DQR ID | Subject | Data Streams Affected |
---|---|---|
D000203.2 | SGP/AOS/C1 - Humidograph water circulation system failure | sgpaosC1.a0 |
D000203.3 | SGP/AOS/C1 - CN counter removed | sgpaosC1.a0 |
D000801.3 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D000801.4 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D000801.5 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D011207.3 | SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding | sgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D011231.1 | SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D011231.2 | SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020110.1 | SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020227.8 | SGP/MPL/C1 - Data missing due to hardware failures | sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1 |
D020313.1 | SGP/THWAPS/C1 - THWAPS C1 miscalibrated | sgpthwapsC1.a1, sgpthwapsC1.b1 |
D020426.6 | SGP/TSI/C1 - sampling rate change | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D020524.27 | SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020526.1 | SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020611.2 | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.34 | SGP/SONDE/C1 - Incorrect Surface Pressure | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.35 | SGP/SONDE/C1 - Bad Temperature Sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020703.1 | SGP/SONDE/C1 - Temperature sensor failure | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020709.3 | SGP/AOS/C1 - AOS Computer Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D020909.1 | SGP/SONDE/C1 - Bad Temperature Sensor | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020909.2 | SGP/SONDE/C1 - Bad Temperature Sensor | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021006.1 | Bad temperature sensor | sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021007.1 | SGP/AOS/C1 - Ozone instrument out of service | sgpaosC1.a0, sgpaosauxC1.a0 |
D021117.1 | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021121.1 | SGP/SONDE/C1 - Contaminated by interference | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021123.2 | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021201.1 | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030114.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030122.1 | SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030130.3 | SGP/TSI/C1 - Metadata Errors in NetCDF Header | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D030206.5 | SGP/SONDE/C1 - Bad temperature/RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030210.1 | SGP/AOS/C1 - Data missing | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0 |
D030330.1 | SGP/Sonde/C1 - Bad temperature, RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030409.1 | SGP/Sonde/C1 - Bad RH in sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.1 | SGP/Sonde/C1 - Sondes launched an hour early | sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.2 | SGP/Sonde/C1 - Incorrect surface temperature on CF sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.3 | SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems | sgpsondeC1.00, sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030419.2 | SGP/SONDE/C1 - Broken Temperature Sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030427.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030507.3 | SGP/SONDE/C1 - Broken temperature sensors | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030614.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030707.7 | SGP/SONDE/C1 - Incorrect surface RH value. | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030722.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030807.1 | SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030917.21 | SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems | sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1 |
D031112.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.b1 |
D031218.1 | SGP/TSI/C1 - Shadowband misaligned | sgptsiC1.00, sgptsicldmaskC1.a1, sgptsiskycoverC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D040127.2 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
D040130.1 | SGP/AOS/C1 - Ozone Instrument removed for repair | sgpaosC1.a0, sgpaosauxC1.a0 |
D040219.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
D040219.2 | SGP/SONDE/C1 - Surface pressure incorrect | sgpsondewnpnC1.b1 |
D040223.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.b1 |
D040301.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.b1 |
D040415.2 | SGP/SONDE/C1 - Temperature sensor broke high into the sounding | sgpsondewnpnC1.b1 |
D040424.1 | SGP/MPL/C1 - Signal degrading | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040426.4 | SGP/MPL/C1 - Detector Failure | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040525.28 | SGP/MPL/C1 - Metadata errors | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040526.1 | SGP/TSI/C1 - Metadata errors | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D040706.4 | SGP/MPL/C1 - Reduced detection sensitivity | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D041005.1 | SGP/SONDE/C1 - Incorrect surface temperature | sgpsondewnpnC1.b1 |
D041013.4 | SGP/SONDE/C1 - Scheduled Soundings Missed | sgpsondeC1.00, sgpsondewnpnC1.b1 |
D041026.3 | SGP/AOS/C1 - PCASP instrument problem | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.4 | SGP/AOS/C1 - Ozone instrument removed for repair | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.5 | SGP/AOS/C1 - Condensation Particle Counter failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.6 | SGP/AOS/C1 - Wet nephelometer problems | sgpaosC1.a0, sgpaosauxC1.a0 |
D041116.2 | SGP/TSI/C1 - Shadowband Misalignment | sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D041123.1 | SGP/THWAPS/C1 - RH Sensor Calibration | sgpthwapsC1.b1 |
D050120.2 | SGP/AOS/C1 - Failed RH sensor | sgpaosC1.a0 |
D050201.1 | SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry error | sgpsondewnpnC1.b1 |
D050321.2 | SGP/TSI/C1 - Instrument failure | sgptsiC1.00, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D050401.1 | SGP/AOS/C1 - wet nephelometer out of service | sgpaosC1.a0 |
D050421.14 | SGP/MPL/C1 - Sensor Calibration | sgpmplC1.00, sgpmplC1.a1 |
D050421.5 | SGP/SONDE/C1 - Surface pressure incorrect | sgpsondewnpnC1.b1 |
D050510.1 | SGP/SONDE/C1 - Surface pressure bad and other data noisy | sgpsondewnpnC1.b1 |
D050510.2 | SGP/SONDE/C1 - Surface pressure incorrect | sgpsondewnpnC1.b1 |
D050603.4 | SGP/SONDE/C1 - Surface pressure incorrect | sgpsondewnpnC1.b1 |
D050614.1 | SGP/VCEIL/C1 - poor signal | sgpvceil25kC1.b1 |
D050725.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
D050811.5 | SGP/SONDE/C1 - Bad T/RH and surface P. | sgpsondewnpnC1.b1 |
D050812.10 | SGP/THWAPS/C1 - Minor bias in humidity | sgpthwapsC1.a1, sgpthwapsC1.b1 |
D050812.12 | SGP/THWAPS/C1 - Minor bias in saturation vapor pressure | sgpthwapsC1.b1 |
D050912.2 | SGP/SONDE/C1 - Temperature/RH incorrect | sgplssondeC1.c1, sgpsondewnpnC1.b1 |
D050914.3 | SGP/MPL/C1 - Instrument offline | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D050928.8 | SGP/TSI/C1 - Heater problem | sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D051024.4 | SGP/AOS/C1 - Nephelometer calibration drift | sgpaosC1.a0, sgpaosauxC1.a0 |
D051027.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
D051121.1 | SGP/SONDE/C1 - Sonde RH values incorrect | sgpsondewnpnC1.b1 |
D060208.2 | SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes | sgpsondewnpnC1.b1 |
D060227.2 | SGP/SONDE/C1 - Soundings done as part of dual-sonde flights | sgpsondewnpnC1.b1 |
D060303.1 | SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launches | sgpsondeC1.00, sgpsondewnpnC1.b1 |
D060515.1 | SGP/TSI/C1 - Birds obstructing view | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskyimageC1.a1 |
D060630.1 | SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde Files | sgpsondewnpnC1.b1 |
D060707.5 | SGP/VCEIL/C1 - low amplitude | sgpvceil25kC1.b1 |
D060906.2 | SGP/AOS/C1 - Missing Condensation Nuclei Counter data | sgpaosC1.a0 |
D060928.2 | SGP/SONDE/C1 - RH values offset due to error in ground check | sgpsondewnpnC1.b1 |
D060928.3 | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry | sgpsondewnpnC1.b1 |
D061127.1 | SGP/CSPHOT/C1 - Unit #99 removed for upgrade | sgpcsphotppC1.00, sgpcsphotppC1.a1, sgpcsphotalmC1.00, sgpcsphotalmC1.a1, sgpcsphotaotC1.00, sgpcsphotaotC1.a1, sgpcsphotsizeC1.00, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.00, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.00, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.00, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.00, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.00, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.00, sgpcsphotcoarsepfn1C1.a1 |
D061201.1 | SGP/SONDE/C1 - RH Sensor failure | sgpsondewnpnC1.b1 |
D070420.1 | SGP/AOS/C1 - Humidifier controller failure | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0 |
D070612.2 | SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode) | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
D070612.4 | SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode) | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
D070905.2 | SGP/AOS/C1 - CPC failure | sgpaosC1.a1 |
D080116.24 | SGP/THWAPS/C1 - RH Data Incorrect | sgpthwapsC1.b1 |
D080307.1 | SGP/ORG/C1 - Frost on lens | sgporgC1.b1 |
D080321.1 | SGP/ORG/C1 - Lens heater failure | sgporgC1.b1 |
D080411.2 | SGP/TSI/C1 - Missing data | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D080414.2 | SGP/TSI/C1 - Contamination of mirror | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
D080717.2 | SGP/CSPHOT/C1 - Instrument failure | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
D080829.2 | SGP/SONDE/C1 - Suspect RH profile from 150-350 m above ground level | sgpsondewnpnC1.b1 |
D080905.3 | SGP/ORG/C1 - Erroneous precipitation observations | sgporgC1.b1 |
D081030.2 | SGP/CSPHOT/C1 - AOT 1640 channel data missing | sgpcsphotaotC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotaotfiltqaC1.a1 |
D090120.5 | SGP/AOS/C1 - Pump failure and subsequent failure of humidified nephelometer | sgpaosC1.a1 |
D090211.2 | SGP/THWAPS/C1 - Barometer intermittent | sgpthwapsC1.b1 |
D090223.6 | SGP/ORG/C1 - False precip measurements | sgporgC1.b1 |
D090224.3 | SGP/SONDE/C1 - Suspect RH values | sgpsondewnpnC1.b1 |
D090306.1 | SGP/THWAPS/C1 - Time stamp of data record incorrect | sgpthwapsC1.b1 |
D090721.1 | SGP/AOS/C1 - Annual maintenance | sgpaosC1.a1, sgpaosauxC1.a1, sgpaosccnC1.a1, sgpaip1ogrenC1.c1, sgpaipavg1ogrenC1.c1 |
D090824.2 | SGP/THWAPS/C1 - Wind speed incorrect | sgpthwapsC1.b1 |
D091104.1 | SGP/ORG/C1 - False reports of precip | sgporgC1.b1 |
D100215.1 | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1 |
D100301.1 | SGP/ORG/C1 - Incorrect precipitation | sgporgC1.b1 |
D100312.1 | SGP/ORG/C1 - Snow falsely identified as rain | sgporgC1.b1 |
D100514.1 | SGP/VCEIL/C1 - Range normalization | sgpvceil25kC1.b1 |
D100803.3 | SGP/SONDE/C1 - Sensor failure | sgpsondewnpnC1.b1 |
D101020.7 | SGP/AOS/C1 - Data processing problem | sgpaosC1.a1, sgpnoaaaosC1.b1, sgpnoaaaosavgC1.b1 |
D101026.2 | SGP/CSPHOT/C1 - Robot errors/Obstruction in tubes | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
D101214.3 | SGP/AOS/C1 - Missing data | sgpaosC1.a1, sgpaosauxC1.a1, sgpaosccnC1.a1 |
D110405.2 | SGP/ORG/C1 - Failure to detect rain | sgporgC1.b1 |
D110414.1 | SGP/ORG/C1 - Incorrect precipitation measurements | sgporgC1.00, sgporgC1.b1 |
D110415.2 | SGP/MET/E13 - PWD data incorrect/missing | sgpmetE13.b1 |
D110419.1 | SGP/MET/E13 - Missing PWD data | sgpmetE13.b1 |
D970207.1 | Metadata for "Height" variable field | sgpmplC1.a0 |
D970408.3 | Continuing signal degradation | sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1 |
D980505.1 | SGP/AOS/C1 - Annual Maintenance | sgpaosC1.a0 |
D980513.1 | SGP/AOS/C1 - Single wavelength nephelometer pump failure | sgpaosC1.a0 |
D980526.1 | SGP/AOS/C1 - PSAP Flow Rate Change | sgpaosC1.a0 |
D980527.2 | SGP/AOS/C1 - Single-wavelength nephelometer errors | sgpaosC1.a0 |
D980527.3 | SGP/AOS/C1 - 3-wavelength nephelometer failure | sgpaosC1.a0 |
D980527.4 | SGP/AOS/C1 - Condensation Particle Counter failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.1 | SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.10 | SGP/AOS/C1 - Instrument communications problems | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.2 | SGP/AOS/C1 - 3-wavelength nephelometer data missing | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.6 | SGP/AOS/C1 - Ozone instrument left in span mode | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.7 | SGP/AOS/C1 - Line 8 bypass in wrong position | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.8 | SGP/AOS/C1 - Light absorption photometer (PSAP) error | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.9 | SGP/AOS/C1 - Ozone Instrument Communication Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D980529.1 | SGP/AOS/C1 - Ozone Instrument data incorrect | sgpaosC1.a0, sgpaosauxC1.a0 |
D980731.1 | SGP/AOS/C1 - Aerosol sampling system and nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D981203.1 | SGP/AOS/C1 - 3-wavelength nephelometer data missing | sgpaosC1.a0, sgpaosauxC1.a0 |
D981223.2 | SGP/AOS/C1 - Intermittent leak in AOS spare sampling line and thermal sensitivity | sgpaosC1.a0 |
D990124.2 | SGP/SONDE - Dry bias in sonde RH | sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
D990224.1 | SGP/MPL - Missing data due to blown detector | sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1 |
D990611.1 | SGP/AOS/C1 - Ozone Instrument Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D990614.1 | SGP/AOS/C1 - Invalid absorption data | sgpaosC1.a0, sgpaosauxC1.a0 |
D990618.1 | SGP/AOS/C1 - Incorrect absorption and scattering data | sgpaosC1.a0 |
D990809.1 | SGP/AOS/C1 - Ozone instrument error | sgpaosC1.a0, sgpaosauxC1.a0 |
D991008.1 | SGP/THWAPS - RH values low by factor of 1.1 | sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1, DsgpthwapsC1.a1, DsgpthwapsC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/1999 | 2300 | 01/15/2000 | 0000 |
Subject: | SGP/AOS/C1 - Humidograph water circulation system failure |
DataStreams: | sgpaosC1.a0 |
Description: | The water circulation system for the AOS humidograph failed. Consequently, the humidified nephelometer was reporting aerosol light scattering values during this period that were close to what the reference nephelometer was observing. The difference between the two sets of measurements reflect particle losses in the humidifier and different temperature environments for the two instruments. Humidified nephelometer data during this period are technically valid, they just do not reflect relative humidity scans (the normal operating mode). |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/1999 | 0448 | 01/15/2000 | 0000 |
07/08/2002 | 1131 | 08/05/2002 | 1424 |
Subject: | SGP/AOS/C1 - CN counter removed |
DataStreams: | sgpaosC1.a0 |
Description: | The AOS condensation particle counter performance degraded to unacceptable levels and was removed for repair. For the first time period: upon inspection of the internal condition of the instrument, it was found that oil was present in the intake line. It is unknown how this oil could have arrived in this position. The instrument was thoroughly cleaned and back-flushed, and returned to service during the maintenance visit. For the second time period: The degradation of began July 8th. Data collected during this time period are either incorrect or missing and should not be used. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/02/2000 | 1842 | 06/16/2000 | 2234 |
Subject: | SGP/AOS/C1 - Nephelometer failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer humidograph system during a Friday Preventative Maintenance. This resulted in liquid water getting into the humidified nephelometer. Flow was restored to the system on Monday, but the nephelometers were producing strange data. A number of tests were performed over the next few days to remotely troubleshoot the situation, to no avail. Eventually, the decision was made to pull both nephelometers and return them to Boulder for repair. This DQR refers only to the reference nephelometer, which was out of service for 2 periods due to 2 separate problems. This DQR is for the first period, from 000602 (1842 GMT) to 000616 (2234 GMT). Light absorption are invalid whenever the reference nephelometer is not operational, because those data are required for correction of the absorption data. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/20/2000 | 1340 | 07/03/2000 | 1833 |
Subject: | SGP/AOS/C1 - Nephelometer failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer humidograph system during a Friday Preventative Maintenance. This resulted in liquid water getting into the humidified nephelometer. Flow was restored to the system on Monday, but the nephelometers were producing strange data. A number of tests were performed over the next few days to remotely troubleshoot the situation, to no avail. Eventually, the decision was made to pull both nephelometers and return them to Boulder for repair. This DQR refers only to the reference nephelometer, which was out of service for 2 periods due to 2 separate problems. This DQR is for the second period, from 000620 (1340 GMT) to 000703 (1833 GMT). Light absorption measurements are invalid whenever the reference nephelometer is not operational, because those data are required for correction of the absorption data. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/02/2000 | 1842 | 07/03/2000 | 1833 |
Subject: | SGP/AOS/C1 - Nephelometer failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer humidograph system during a Friday Preventative Maintenance. This resulted in liquid water getting into the humidified nephelometer. Flow was restored to the system on Monday, but the nephelometers were producing strange data. A number of tests were performed over the next few days to remotely troubleshoot the situation, to no avail. Eventually, the decision was made to pull both nephelometers and return them to Boulder for repair. This DQR refers only to the humidified nephelometer, which was out of service for the entire period from 000602 through 000703. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/2001 | 2328 | 12/04/2001 | 0158 |
Subject: | SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It looks as though the temperature sensor was damaged on launch. The recorded temp goes from 16.4 at the surface to -42.6 at 2 seconds into the flight. The temperature never exceeds -42 though the RH and pressure look reasonable, but probably should be considered questionable. |
Measurements: | sgpsondewnpnC1.00:
sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2001 | 0527 | 12/22/2001 | 0659 |
Subject: | SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature data in this sounding look bad after the first value. The temperature series is 11.4, 2.6, -14.3, -32.4 in the first 6 seconds of flight. I don't know why this occurred, but it obviously is incorrect. The pressure and RH data look reasonable. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/28/2001 | 2326 | 12/29/2001 | 0045 |
Subject: | SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature data in this sounding are bad from approximately 16 seconds into the flight. The temperature series is 9.9, 10.8, 11.3, 1.5, 11.6, 11.6, 11.6, -32.2 and remains below -30 degC. I don't know why this occurred, but it clearly is incorrect. The pressure data looks OK as does the RH, though the RH data are missing (probably sensor failure) above roughly 3.5 km. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/2002 | 0528 | 01/08/2002 | 0714 |
Subject: | SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Temperature values in this sounding went from 3.5 degC at the surface to -33.3 degC at the next sample. It appears that all the remaining temperature values have an approximate -35 degC offset. The pressure and RH values appear reasonable. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/10/2001 | 0000 | 10/29/2001 | 2033 |
Subject: | SGP/MPL/C1 - Data missing due to hardware failures |
DataStreams: | sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1 |
Description: | The MPL instrument was out of service during the time range specified due to hardware failures. Data during this period are missing and unrecoverable. |
Measurements: | sgpmplC1.a0:
sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplC1.00:
sgpmplcbh1scottC1.c0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2002 | 0340 | 04/23/2002 | 1418 |
Subject: | SGP/THWAPS/C1 - THWAPS C1 miscalibrated |
DataStreams: | sgpthwapsC1.a1, sgpthwapsC1.b1 |
Description: | Power outages apparently led to the THWAPS HMP233 temperature and RH sensor being replaced at C1. The power went out at 0340 on 3/9 was restored at 0635 and went out again at 2025. The new HMP233 appears to be incorrectly calibrated and all temperature data since its installation are wrong. If I am correct about the nature of the calibration problem, the true average temperature can be recovered from that recorded by a linear conversion, but I don't think its worth the trouble. |
Measurements: | sgpthwapsC1.b1:
sgpthwapsC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 04/26/2002 | 0018 |
Subject: | SGP/TSI/C1 - sampling rate change |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | SGP TSI-880 sampling rate changed from 20-second to 30-second at 20020426.001900 UTC (20020425.1819 SGP CF local time) per ECR-00226 and BCR-00491. This change brings all ARM TSIs to the same operational sampling rate. Daily SGP TSI data volume will decrease by about 1/3 due to this change. |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/22/2002 | 1130 | 05/22/2002 | 1347 |
Subject: | SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the sonde sensor boom was damaged upon launch. The result is that no RH data are reported and the reported temperature is something on the order of 60 degC too low. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/23/2002 | 1129 | 05/23/2002 | 1322 |
Subject: | SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the sensor boom was damaged shortly after launch. The temperature reading jumps -60 degC and the RH goes to 0. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2002 | 0229 | 06/09/2002 | 0236 |
Subject: | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature and RH for this sounding look bad, either because of interference from another sonde or because the temperature sensor was broken on launch. The sounding terminated early in any event. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2002 | 1128 | 06/17/2002 | 1313 |
Subject: | SGP/SONDE/C1 - Incorrect Surface Pressure |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the operator made a typographical error when entering the surface pressure. The file has 987.0 hPa and it probably should be 978.0 which would be consistent with the first sample provided by the radiosonde (977.3 hPa), the surface pressures recorded for the adjacent soundings, and the THWAPS pressure. Because the sounding altitude is calculated assuming the surface pressure is correct, the altitude values for the entire flight and the ascent rate values for the first 30 seconds of the sounding will be incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/2002 | 2329 | 06/20/2002 | 0036 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke shortly after launch. As a result, the temperature and dewpoint values are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/27/2002 | 1728 | 06/27/2002 | 1908 |
Subject: | SGP/SONDE/C1 - Temperature sensor failure |
DataStreams: | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Temperature sensor broke at launch. All temperature-related variables are incorrect. |
Measurements: | sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/23/2002 | 2011 | 05/26/2002 | 2033 |
05/27/2002 | 0232 | 05/28/2002 | 1439 |
05/29/2002 | 0258 | 05/29/2002 | 1516 |
05/29/2002 | 2159 | 05/30/2002 | 1113 |
05/31/2002 | 2310 | 06/04/2002 | 1447 |
Subject: | SGP/AOS/C1 - AOS Computer Failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS computer started to experience periodic failures caused by an aging and failing system disk. Replacement of the AOS computer's system disk occurred between 2-4 June 2002. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2002 | 1727 | 09/06/2002 | 1854 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke upon launch and therefore the reported temperature is approximately 40 degC too low. |
Measurements: | sgplssondeC1.c1:
sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2002 | 0527 | 09/06/2002 | 0718 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke shortly after launch. Temperatures are offset by approxmiately (but not constantly) 40 degC. |
Measurements: | sgplssondeC1.c1:
sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/2002 | 1120 | 10/03/2002 | 1320 |
Subject: | Bad temperature sensor |
DataStreams: | sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperture sensor broke a few seconds into flight. This results in an unreasonably low temperature for the rest of the flight. For some reason, the rh values also go missing shortly after launch. Only the wind and pressure data are reliable. |
Measurements: | sgplssondeC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/30/2002 | 0000 | 10/01/2002 | 1934 |
Subject: | SGP/AOS/C1 - Ozone instrument out of service |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The ice storm of 30-31 January, 2002 shut down the AOS for ~2 weeks. A controlled power-up of the system found a problem with the ozone monitor. Smoke was observed to come from the ozone instrument, at which time it was shut down. The ozone monitor was removed from the AOS for remote troubleshooting. The cause of the smoke was identified as being from underneath a printed circuit board. At that point, Site Ops staff were requested to send the unit to Boulder for additional troubleshooting. NOAA staff received the unit on 20 February 2002. After a brief inspection, the cause of the smoking was discovered. A one-half inch hole was burned completely through the motherboard. The determination was made that this could not be repaired at the NOAA facility, and a purchase order was initiated to return the unit to Dasibi, Inc. (the manufacturer), for repair/replacement of the motherboard. On 4 March, 2002, NOAA personnel received the OK from ARM to return the instrument to Dasibi, Inc. for service. Dasibi, Inc., received the unit on or around 8 March, 2002. The manufacturer was to test the unit, repair or replace the damaged motherboard, and calibrate the unit according to the NIST standard protocol. On 8 May, 2002, NOAA personnel emailed SGP Site Ops personnel and asked them to check on the status of the repair, which was taking longer then expected. Upon trying to contact the manufacturer, it was discovered that they went out of business. The return of instruments from the manufacturer to customers was being handled by a contract company. The ozone monitor arrived back in Boulder, in an unrepaired state, on or about 1 July 2002. Since there were few other options, NOAA personnel undertook the difficult task of repairing the motherboard. This required the re-routing of several electrical conduits from the burned area in the multilayer board to other acceptable places on the board. This took a considerable amount of electronics technician time and effort. After the motherboard was repaired, extensive testing was required to verify that the repair was done successfully and that other problems were not caused in the unit by the board burning.. The repair was deemed successful on 24 September, 2002. The unit was shipped back to the SGP site immediately thereafter. It was installed during a NOAA AOS maintenance visit on 1 October, 2002. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2002 | 2044 | 11/13/2002 | 2205 |
Subject: | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH data in this sounding is erratic between 2km and 10 km, oscillating between reasonable values (~40%RH) and zero. I certainly doubt that this is a real, heretofore unreported, atmospheric phenomenon so I have to conclude that something is probably wrong with the sensor. I have not seen this behavior before. One would have to look at the absolutely raw RH data to explore further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/19/2002 | 1423 | 11/19/2002 | 1623 |
11/19/2002 | 1726 | 11/19/2002 | 1917 |
11/19/2002 | 2026 | 11/19/2002 | 2204 |
Subject: | SGP/SONDE/C1 - Contaminated by interference |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These three soundings are contaminated by interference from another radiosonde. It is not clear why; this doesn't usually happen at the CF where the operators are very experienced and frequency separation is not usually a problem. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/2002 | 0225 | 11/20/2002 | 0412 |
Subject: | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Like several soundings on 11/19, this sounding was affected by interference from another radiosonde. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2002 | 1130 | 11/21/2002 | 1311 |
Subject: | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH samples in this sounding oscillate between reasonable values (60-80%) and zero. This may be a problem with the RH sensor or the software that alternates between the heated and non-heated RH elements. In either case, the reported values are questionable. More investigation of the raw binary data would be required to diagnose further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2003 | 0536 | 01/11/2003 | 0551 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH values during the first 15 minutes of this sounding oscillate between reasonable values and near-zero values. The oscillation is irregular and seems to be related to failure of the RH sensor heating process. I have informed Vaisala of the problem and provided raw data files to them for analysis. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/19/2003 | 1134 | 01/19/2003 | 1259 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The radiosonde temperature sensor apparently broke during launch. This results in bad temperature, dew point, and rh data. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 01/21/2003 | 2359 |
Subject: | SGP/TSI/C1 - Metadata Errors in NetCDF Header |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | The value of "sample_int" reported in the netCDF header is incorrect. The correct sampling interval is 30 seconds. The maximum values for the variable "sunny" is incorrect. It should be 1, not 100 as documented in the netCDF header. Users should disregard the "qc_sunny" flag during this period of time and apply their own qc check if desired. The minimum value for the variable "solar.altitude" is incorrect. It should be -90, not 10 as documented in the netCDF header. Users should disregard the "qc_solar.altitude" flag during this period of time and apply their own qc check if desired. |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2003 | 1732 | 02/02/2003 | 1832 |
Subject: | SGP/SONDE/C1 - Bad temperature/RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke shortly after launch. All temperature and RH-related data are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/27/2002 | 1805 | 12/31/2002 | 1543 |
Subject: | SGP/AOS/C1 - Data missing |
DataStreams: | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The UPS supplying power to the AOS computer failed on Friday, 12/27/2002. The UPS was repaired on Monday 12/30/2002, but the AOS computer was locked up and would not reboot. Telephone communication was established with Richard Eagan, ANL, who was able to do a remote reboot of the computer using his account. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
sgpaosC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/18/2003 | 1132 | 03/18/2003 | 1322 |
03/20/2003 | 1131 | 03/20/2003 | 1140 |
03/20/2003 | 1731 | 03/20/2003 | 1904 |
Subject: | SGP/Sonde/C1 - Bad temperature, RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These three soundings all show the effects of a temperature sensor broken at launch. The temperature, RH, dew-point values all are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 1144 | 04/06/2003 | 1203 |
Subject: | SGP/Sonde/C1 - Bad RH in sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH sensor heating circuit was out of synch from about 400 sec after launch until the circuit was turned off whent he sounding temperature reached approximately 233 degK (-40 degC) about 1500 sec after launch. During this time period the reported RH oscillates between reasonable values and near-zero values. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 2200 | 04/07/2003 | 0700 |
Subject: | SGP/Sonde/C1 - Sondes launched an hour early |
DataStreams: | sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It looks like someone forgot to set his/her clock ahead. The sounding that should have been done at 23:30 UTC on 4/6 was done at 22:38 and the following sounding, which should have been done at 0530 on 4/7 was done at 04:31. The subsequent soundings all are done at the correct times. |
Measurements: | sgpsondewnpnC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 2238 | 04/06/2003 | 2238 |
Subject: | SGP/Sonde/C1 - Incorrect surface temperature on CF sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the operator entered an incorrect value for surface temperature. Rather than 43.2 degC in the file, the value is most likely 19. degC (thwaps reading 19.4, first sonde reading aloft 18.6). |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2003 | 1730 | 04/01/2003 | 1930 |
04/02/2003 | 0530 | 04/02/2003 | 0730 |
04/02/2003 | 1130 | 04/02/2003 | 1330 |
Subject: | SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems |
DataStreams: | sgpsondeC1.00, sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These sonde launches where unsuccessful due to problems with the antenna configuration resulting in signal loss before the launch. |
Measurements: | sgplssondeC1.c1:
sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2003 | 2332 | 04/16/2003 | 0124 |
Subject: | SGP/SONDE/C1 - Broken Temperature Sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke shortly after launch as a result all variables that are affected by temperature are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/18/2003 | 1130 | 04/18/2003 | 1310 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All temperature-related variables (dp, tdry, rh) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/04/2003 | 1130 | 05/04/2003 | 1145 |
05/04/2003 | 2330 | 05/05/2003 | 0116 |
Subject: | SGP/SONDE/C1 - Broken temperature sensors |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensors broke at launch on both of these soundings. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2003 | 1730 | 06/09/2003 | 1737 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/22/2003 | 2331 | 06/22/2003 | 2331 |
Subject: | SGP/SONDE/C1 - Incorrect surface RH value. |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The surface RH value, reported as 0%RH should be 52%. This resulted from a typographical error by the operator when entering the surface data. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/2003 | 1730 | 07/19/2003 | 1930 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2003 | 1725 | 08/02/2003 | 1726 |
Subject: | SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | I've never seen this before. The temperature reported by the radiosonde dropped over 30 degC just after launch (usually a symptom of a broken temperature sensor), but then recovered after 14 seconds of bad readings. The temperatures from 2 seconds through 14 seconds after launch are incorrect, the remainder of the sounding looks fine. I have sent the data files to Vaisala for their consideration. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2002 | 2055 | 03/11/2002 | 2005 |
03/13/2002 | 1755 | 03/14/2002 | 1505 |
Subject: | SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems |
DataStreams: | sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1 |
Description: | Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems. |
Measurements: | sgpthwapsC1.b1:
sgpthwapsB5.00:
sgpthwapsC1.a1:
sgpthwapsB6.a1:
sgpthwapsC1.00:
sgpthwapsB6.b1:
sgpthwapsB1.00:
sgpthwapsB1.b1:
sgpthwapsB1.a1:
sgpthwapsB6.00:
sgpthwapsB5.a1:
sgpthwapsB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2003 | 1133 | 11/01/2003 | 1315 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/2003 | 1840 | 07/05/2003 | 1523 |
Subject: | SGP/TSI/C1 - Shadowband misaligned |
DataStreams: | sgptsiC1.00, sgptsicldmaskC1.a1, sgptsiskycoverC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | The shadowband and mask were initially misaligned after the re-installation of the TSI. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsiC1.00:
sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/2004 | 2015 | 01/16/2004 | 2151 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The RH values during the first half of this sounding oscillate between reasonable values and near-zero values. The oscillation is irregular and seems to be related to failure of the RH sensor heating process. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2003 | 1636 | 01/27/2004 | 2208 |
Subject: | SGP/AOS/C1 - Ozone Instrument removed for repair |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The ozone instrument was removed for calibration on 2003 11/21. It was shipped to Boulder and was cleaned and calibrated. It was sent back to SGP on 2003 12/02, but was damaged in transit by FedEx. The instrument was reinstalled on 2003 12/03 but was found to be defective. Large spikes were observed in the data. Afetr a few days the instrument was removed and shipped to a vendor for repair. The ozone monitor was returned to service after repair at 2004 01/27 (2208 GMT). |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/2004 | 0530 | 02/09/2004 | 0601 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The RH values during the first part of this sounding oscillate between reasonable values and near-zero values. The oscillation seems to be related to failure of the RH sensor heating process. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0530 | 02/02/2004 | 0826 |
Subject: | SGP/SONDE/C1 - Surface pressure incorrect |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | I think the operator inadvdertently transposed to digits when entering the surface pressure value. The value entered is 987.0 hPa but the value shown in the raw data file at launch is 978.0. As a result, the absolute altitudes in this sounding will be slightly incorrect as will be the ascent rate during the first 30 seconds of flight. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/19/2004 | 1746 | 02/19/2004 | 1946 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2004 | 0531 | 02/27/2004 | 0721 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke shortly after launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/13/2004 | 1229 | 04/13/2004 | 1301 |
Subject: | SGP/SONDE/C1 - Temperature sensor broke high into the sounding |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The temperature sensor on this radiosonde appeared to break 56 minutes and 22 seconds into the sounding at an altitude of 16570 m. All the data below this point are good; only the data above this point to the end of the sounding (88 minutes and 14 seconds) are bad. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/2002 | 0000 | 01/16/2003 | 2359 |
Subject: | SGP/MPL/C1 - Signal degrading |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The MPL viewport window was blown off during a storm on 2002/09/25. The MPL received a soaking of rain. Following this event, although site operations cleaned and dried the optics, the lidar performance continued to degrade over the next few months. Although initially suitable for cloud detection, by Dec 10th the lidar was providing useful results only during the day (oddly enough). By Jan 16, the detector was dead. It is not recommended to depend on night-time cloud base heights after Dec. 10 2002. It is not recommended to use any of the data after 9/25 for aerosol retrievals. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/2003 | 0000 | 01/31/2003 | 2359 |
Subject: | SGP/MPL/C1 - Detector Failure |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The detector failed following a period of data quality degradation. The MPL was replaced on 1/31/2003. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1996 | 0000 | 01/19/2000 | 2359 |
Subject: | SGP/MPL/C1 - Metadata errors |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The latitude, longitude and altitude of the Micropulse Lidar (MPL) were incorrectly entered into the ARM database. The correct location of the SGP.C1 MPL is: Lat: 36.606N Lon: 97.485W Alt: 316m |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 05/05/2003 | 2359 |
Subject: | SGP/TSI/C1 - Metadata errors |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | The latitude, longitude and altitude of the Total Sky Imager (TSI) were incorrectly entered into the ARM database. The correct location of the SGP.C1 TSI is: Lat: 36.606N Lon: 97.485W Alt: 316m |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 1500 | 07/07/2004 | 0350 |
07/23/2004 | 2200 | 09/10/2004 | 2100 |
Subject: | SGP/MPL/C1 - Reduced detection sensitivity |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | During the time periods indicated, the laser power supply was low. This resulted in compromised detection sensitivity, particularly for thin clouds and/or during daylight hours. That is, some clouds may not have been identified. The low laser power would not have resulted in false positives. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/02/2004 | 1130 | 10/02/2004 | 1131 |
Subject: | SGP/SONDE/C1 - Incorrect surface temperature |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The operator entered a the surface temperature incorrectly on this sounding. The sonde data file shows the temperature as 33.5 degC but the operations log shows it as 3.5 degC. The first temperature recorded by the sonde after launch is 3.7 degC, consistent with the typical early morning inversion. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/2004 | 2330 | 01/17/2004 | 1830 |
01/18/2004 | 0530 | 01/18/2004 | 0630 |
01/21/2004 | 0530 | 01/21/2004 | 0630 |
Subject: | SGP/SONDE/C1 - Scheduled Soundings Missed |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.b1 |
Description: | The following scheduled sonde launches were missed due to computer system failures: 20040116.2330 20040117.0530 20040117.1130 20040117.1730 20040118.0530 20040121.0530 |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2004 | 0000 | 10/26/2004 | 1200 |
Subject: | SGP/AOS/C1 - PCASP instrument problem |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | PCASP (optical particle counter) gave unusually low aerosol signal counts despite numerous attempts to fix the instrument by the mentor and manufacturer. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2003 | 1600 | 01/28/2004 | 0000 |
Subject: | SGP/AOS/C1 - Ozone instrument removed for repair |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The ozone monitor was removed and sent back to the manufacturer for repair. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/28/2004 | 1400 | 08/27/2004 | 1540 |
Subject: | SGP/AOS/C1 - Condensation Particle Counter failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The CPC signal declined to a low value. The instrument was shipped back to the mentor, cleaned and repaired. The instrument inlet was clogged. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/24/2004 | 0000 | 02/18/2004 | 1800 |
Subject: | SGP/AOS/C1 - Wet nephelometer problems |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The humidifier tube was coated with mold and had to be replaced. This affects the wet nepheleometer measurements and the calculations of the aerosol hygroscopic growth. The humidifer was cleaned and replaced. A filter was added to the water circulation to minimize mold. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/25/2004 | 1640 | 11/16/2004 | 2232 |
Subject: | SGP/TSI/C1 - Shadowband Misalignment |
DataStreams: | sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | The shadowband was slightly misaligned and was corrected by adjusting it +2 degrees. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/2004 | 2135 | 11/29/2004 | 1930 |
Subject: | SGP/THWAPS/C1 - RH Sensor Calibration |
DataStreams: | sgpthwapsC1.b1 |
Description: | The analog output for the T/RH probe was incorrectly calibrated. This caused excessively high readings of RH. |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2004 | 0000 | 05/01/2005 | 2359 |
Subject: | SGP/AOS/C1 - Failed RH sensor |
DataStreams: | sgpaosC1.a0 |
Description: | The RH sensor inside the humidified nephelometer began to slowly decline in value in the upper RH range beginning in early 2004 and becoming more noticable poor on 20041117. The sensor currently reaches a high RH value of about 60% when the actual RH is closer to 80%. The sensor was replaced in the Spring of 2005, but the problem remained. Effective 1/1/2004, this sensor is not used to calculate scientific data and is therefore essentially abandoned in the field. An end-date of 20050501 is being used as a placeholder. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/19/2005 | 0531 | 01/19/2005 | 0706 |
Subject: | SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry error |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | There is a discrepency between the surface pressure and temperature data entered by the operator and that recorded by the THWAPS. Review of the raw data from the radiosonde shows that the pressure was periodically varying by as much as 12 hPa (~988 to 1000)in the time period before launch. The operator entry of 998.2 is at the high end of this range - the concurrent THWAPS reading was about 988.4 at the low end. The operator entered temperature 6.2 degC is considerably higher than the THWAPS value of 1.8. The pre-flight log entry for this sounding is missing from the OMIS database. If not for the extremely unstable pressure reading I would have assumed this was an operator error. It will take some more research to figure out what is going on. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/17/2005 | 1925 | 04/05/2005 | 1630 |
Subject: | SGP/TSI/C1 - Instrument failure |
DataStreams: | sgptsiC1.00, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | The TSI-880 experienced a power and/or computer failure. It was replaced with a spare TSI-440 and data collection resumed 4/5/05. Note: this is a temporary replacement. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsiC1.00:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/04/2005 | 0000 | 03/22/2005 | 1955 |
Subject: | SGP/AOS/C1 - wet nephelometer out of service |
DataStreams: | sgpaosC1.a0 |
Description: | The humidified nephelometer was removed and shipped back to CMDL to test and work on the relative humidity sensor inside the instrument. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/2004 | 0000 | 02/23/2005 | 2300 |
Subject: | SGP/MPL/C1 - Sensor Calibration |
DataStreams: | sgpmplC1.00, sgpmplC1.a1 |
Description: | The Energy Monitor records the value of the laser energy. During the time in question, the laser energy exceed the maximum value in the calibration table for the energy monitor. In other words, the value is pegged. This condition does not affect the backscatter signal. But it will prevent users from normalizing the backscatter signal to the laser output. |
Measurements: | sgpmplC1.a1:
sgpmplC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2005 | 1749 | 04/11/2005 | 1920 |
Subject: | SGP/SONDE/C1 - Surface pressure incorrect |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | I think the operator inadvdertently entered an incorrect surface pressure value. The value entered is 988.8 hPa but the value shown in the raw data file at launch is 968.8. As a result, the absolute altitudes in this sounding will be slightly incorrect as will be the ascent rate during the first 30 seconds of flight. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2005 | 1726 | 04/26/2005 | 1910 |
Subject: | SGP/SONDE/C1 - Surface pressure bad and other data noisy |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | I was checking this sounding because the surface pressure entered by the operator was considerably higher than that recorded by the TWHAPS and SMOS. I'm not sure why, but the pressure data are very noisy while the sonde is on the ground (which accounts for the incorrect surface pressure) and the RH data aloft do not look terrible but do not look great either. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/29/2005 | 2329 | 04/30/2005 | 0111 |
Subject: | SGP/SONDE/C1 - Surface pressure incorrect |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | I think the operator inadvdertently typed an 89 instead of a 78 when entering the surface pressure value. The value entered is 989.9 hPa but the value shown in the raw data file at launch is 978.9. As a result, the absolute altitudes in this sounding will be slightly incorrect as will be the ascent rate during the first 30 seconds of flight. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/11/2005 | 0530 | 05/11/2005 | 0750 |
Subject: | SGP/SONDE/C1 - Surface pressure incorrect |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | I think the operator inadvdertently mistyped a digit when entering the surface pressure value. The value entered is 975.6 hPa but the value shown in the raw data file at launch is 972.6. As a result, the absolute altitudes in this sounding will be slightly incorrect as will be the ascent rate during the first 30 seconds of flight. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/05/2005 | 1842 | 04/19/2006 | 1713 |
Subject: | SGP/VCEIL/C1 - poor signal |
DataStreams: | sgpvceil25kC1.b1 |
Description: | When parameters were changed (set noise_h2_compensation to "ON" and units to "METERS") to correct a low amplitude problem, the backscatter plots began displaying horizontal stripes indicating detector "ringing". However, the cloud base heights are not affected. The problem was corrected when the instrument was replaced. |
Measurements: | sgpvceil25kC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/17/2005 | 2347 | 07/18/2005 | 0141 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The RH values below 6 km are incorrect. The problem relates to a failure of the GC25 ground check set used before this particular sounding. The failure seems to have affected the sensor calibration with the effect that one of the two sensors was reading artificially high. Because the internal processing software uses the highest of the two sensor readings, the bad sensor value is chosen whenever it is not heated. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2005 | 1132 | 08/01/2005 | 0116 |
Subject: | SGP/SONDE/C1 - Bad T/RH and surface P. |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Apparently multiple failures. The radiosonde temperature sensor broke on launch causing an approximate 35 degC negative offset and as a result, the RH is incorrect. Furthermore, it appears that the pressure sensor was off by approximately 4 hPa, though this would not affect the altitude calculation, the absolute pressure is wrong. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/1999 | 0000 | 12/07/1999 | 1100 |
Subject: | SGP/THWAPS/C1 - Minor bias in humidity |
DataStreams: | sgpthwapsC1.a1, sgpthwapsC1.b1 |
Description: | The THWAPS humidity sensor output was scaled so that the instrument output voltage range (0-1VDC) represented 0-100 %RH. Comparisons with the co-located chilled mirror sensor at the CF suggested that the THWAPS RH sensor was reading artifically low at high humidities because of this 100 %RH maximum. The scaling of the system was changed so that 0-1 VDC now represents 0-110 %RH. This resulted in a slight loss of precision in the measurements, but since the RH measurement is only accurate to 2-3 %RH at best, this isn't a significant problem. |
Measurements: | sgpthwapsC1.b1:
sgpthwapsC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/1999 | 0000 | 08/10/2005 | 1445 |
Subject: | SGP/THWAPS/C1 - Minor bias in saturation vapor pressure |
DataStreams: | sgpthwapsC1.b1 |
Description: | The saturation vapor correction when temps are below 0C contained an error in the multiplier. The incorrect multiplier only equates to an error of 0.01 kPa which is less than the stated uncertainty of the measurement (+/- 0.035 kPa). |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/09/2005 | 1132 | 09/09/2005 | 1332 |
Subject: | SGP/SONDE/C1 - Temperature/RH incorrect |
DataStreams: | sgplssondeC1.c1, sgpsondewnpnC1.b1 |
Description: | The temperature throughout this sounding is too high and as a result the RH values will be incorrect as well. I'm not sure what is wrong here but the operators noted reasonable values (18.1 degC, 87%) in the log before launch. Review of the raw data, however, shows the sonde reporting temperatures nearly 20 degC higher. I suppose it is possible that the operator entered into the log the reference temperature from the GC25 ground check set rather than the temperature reported by the sonde - I can't think of any other explanation - there is no doubt that the temperature sensor on this sonde was bad. |
Measurements: | sgplssondeC1.c1:
sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0350 | 07/23/2004 | 2150 |
Subject: | SGP/MPL/C1 - Instrument offline |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | Instrument was taken offline due to a failure of the laser power supply. Data are missing and unrecoverable. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2005 | 2135 | 10/06/2005 | 1650 |
Subject: | SGP/TSI/C1 - Heater problem |
DataStreams: | sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | The TSI was converted from a model 880 to 660 which requires separate power for the mirror heater. The heater was not powered during this period so morning dew and other condensation was not quickly evaporated. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2005 | 1536 | 10/28/2005 | 1940 |
Subject: | SGP/AOS/C1 - Nephelometer calibration drift |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | Bad span check on the humidified nepehelometer. Instrument was recalibrated and returned to service on 10/28/2005 at 1940 UTC. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/24/2005 | 1140 | 10/24/2005 | 1204 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The RH values during this sounding oscillate between reasonable values and near-zero values. The oscillation is due to failure of the RH sensor heating process. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/13/2005 | 2346 | 04/15/2005 | 1732 |
Subject: | SGP/SONDE/C1 - Sonde RH values incorrect |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | RH values for all sondes launched during this time were incorrect due to a faulty Ground Check set which damaged or conditioned the RH sensor improperly. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/10/2006 | 0000 | 12/31/2006 | 2359 |
Subject: | SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Because of a manufacturer's production problem, we will be using both RS92-SGP (GPS windfinding and RS92-KL (Loran windfinding) radiosondes at the SGP/CF starting February 10, 2006. The radiosonde type used for the each sounding may be determined by looking the metadata variable "launch_status" in the netCDF data files. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/22/2006 | 0000 | 02/27/2006 | 0000 |
Subject: | SGP/SONDE/C1 - Soundings done as part of dual-sonde flights |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The following soundings done during the subject time period were flown in dual-sonde mode in which the standard ARM RS92 radiosonde was attached to the same balloon with a NASA ATR (atmospheric temperature reference) radiosonde. The radiosondes were separated by a 6' styrofoam bar. To accommodate the additional weight, we used 1200g balloons rather than 350g balloons. Accordingly, we want to alert users that these soundings may reach higher altitudes than normal for ARM soundings and that the ascent rate may be somewhat higher. The following soundings are affected: Sequence Date UTC launch time 1 2/22 0530 2 2/22 1730 3 2/22 2330 <---- No data: launch failure 4 2/23 0230 5 2/23 0530 6 2/23 1730 7 2/23 2030 8 2/23 2330 9 2/24 2330 10 2/25 0215 11 2/25 0509 12 2/25 1730 13 2/25 1930 14 2/25 2300 |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/17/2004 | 2331 | 01/18/2004 | 0108 |
01/18/2004 | 1138 | 01/18/2004 | 1252 |
01/18/2004 | 1729 | 01/18/2004 | 1852 |
01/18/2004 | 2339 | 01/19/2004 | 0111 |
01/19/2004 | 0531 | 01/19/2004 | 0711 |
01/19/2004 | 1136 | 01/19/2004 | 1316 |
01/19/2004 | 1723 | 01/19/2004 | 1752 |
01/19/2004 | 2331 | 01/20/2004 | 0101 |
01/20/2004 | 0531 | 01/20/2004 | 0703 |
01/20/2004 | 1132 | 01/20/2004 | 1332 |
01/20/2004 | 1728 | 01/20/2004 | 1928 |
01/20/2004 | 2330 | 01/21/2004 | 0130 |
01/21/2004 | 1731 | 01/21/2004 | 1931 |
Subject: | SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launches |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.b1 |
Description: | The digiCORA-III failed on Saturday 2004-01-17. The operators reported that they were unable to load the software and conduct normal soundings. Following procedure, they conducted the regular soundings by using the S01/S02 systems as allowed by the AIRS IOP schedule. The netCDF header fields "input_source" and "facility_id" will mention which of the S01/S02 systems was used in these launches. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/20/2005 | 0000 | 06/05/2005 | 2359 |
05/02/2006 | 0000 | 06/14/2006 | 1525 |
Subject: | SGP/TSI/C1 - Birds obstructing view |
DataStreams: | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskyimageC1.a1 |
Description: | Birds were frequently in the the field-of-view and soiling the mirror, affecting the visible sky image and resulting processed cloud fraction image. Bird deterant spikes were installed on top of the camera housing and arm on 5/16 which prevented their perching on the camera so that the impact on the sky image was reduced. But birds were still present around the edges of the mirror until additional spikes were installed on top of the four corners of the enclosure on 6/14. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsimovieC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2006 | 0000 | 06/21/2006 | 2359 |
Subject: | SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde Files |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The wind finding hardware failed so that no wind or latitude/longitude data was collected on the launches for these days. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/06/2004 | 1820 | 05/05/2005 | 1841 |
Subject: | SGP/VCEIL/C1 - low amplitude |
DataStreams: | sgpvceil25kC1.b1 |
Description: | When the instrument was replaced with a spare, the backscatter plots began displaying a suspiciously low amount of amplitude (noise) but the cloud base heights were not affected. Discovered that when the vendor repaired this unit in August 2004, noise compensation was set to "OFF". Changed the parameters to "ON". Also noted that the measurement units was set to "FEET". This was changed to "METERS. The heights are not affected because the ingest recognizes the raw data units and automatically converts to meters. |
Measurements: | sgpvceil25kC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/31/2006 | 1355 | 09/11/2006 | 1900 |
Subject: | SGP/AOS/C1 - Missing Condensation Nuclei Counter data |
DataStreams: | sgpaosC1.a0 |
Description: | AOS Condensation Nuclei Counter stopped detecting particle counts and was returned to mentor for cleaning. The instrument has small orifices and has a tendency to clog. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2006 | 2332 | 09/25/2006 | 1600 |
Subject: | SGP/SONDE/C1 - RH values offset due to error in ground check |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Background: After installation of the latest software update , we began performing formal ground checks on RS92 radiosondes. By comparing the radiosonde readings with reference values in a controlled environment, the ground check is intended to ensure that the radiosonde sensors are in calibration before launch. The radisonde values during the ground check process are recorded automatically; the reference values are entered by the operator. If the radiosonde readings vary from the reference values, the system 'corrects' the radiosonde values. In the case of RH, the correction is applied as an offset (true RH = indicated RH + correction). Problem: Some operators misunderstood the ground-check procedure and entered the radiosonde values of RH rather than the reference value (assumed 0%RH), thus, some soundings done during this period have RH values that are different from what they would be if the ground check procedure had been done correctly. Consequence: Because the RH corrections generally are small (averaging about 0.5% RH) and the precision of the reported RH data during this time period is 1% RH, some values will not be affected at all; others will be off by about 1% RH (still within the stated accuracy of the sensor). Furthermore, because entering the radiosonde value as the reference value results in a near zero 'correction,' one may view these soundings as being done without the ground check correction. Also note that the dew point value will be suspect as well. I am attaching below a listing of the soundings that were affected during the indicated time period. Users can see the magnitude of the problem and choose whether or not to apply an offset in RH. Note that application of the offset to the processed RH data (in the netCDF file) will not have the same effect of applying the correction to the absolutely raw data (before processing), but the differences should be insignificant. Also note that the corrections for each sounding are included in the netCDF header information. These attributes are named 'humidity_correction' and 'humidity_correction_2'. The values of RH indicated by the radiosonde while it is in the ground check set are in attributes 'humidity_gc_sonde' and 'humidity_gc_sonde_2.' There is an RH reading for each of the two RH sensors used in the RS92 radiosonde. Here is the list - RH1 and RH2 are the radiosonde readings in the ground check set. Ref is the reference value entered by the operator. The correcte reference value should be 0%. To obtain an approximation to the RH value that would have been recorded if the ground check had been done properly, subtract the Ref value from the indicated RH. YYYYMMDD HHMM SerialN RH1 RH2 Ref 20060827 2332 B2624322 1.00 1.00 1.00 20060828 1731 B2634078 1.00 1.00 1.00 20060828 2332 B2624380 3.00 3.00 2.00 20060909 2331 B2615266 1.00 1.00 1.00 20060915 1759 B2914012 1.00 1.00 1.00 20060919 2350 B2825128 1.00 1.00 1.00 20060920 1800 B2825088 1.00 1.00 1.00 20060920 2346 B2815633 1.00 1.00 1.00 20060921 1728 B2834732 1.30 1.30 1.30 20060921 2330 B2825042 1.50 1.50 1.50 20060922 0527 B2825043 1.70 1.80 1.70 20060922 1128 B2825031 1.60 1.50 1.60 20060922 1729 B2834437 1.50 1.50 1.50 20060922 2330 B2825040 0.40 0.50 0.50 20060923 0529 B2834733 0.30 0.30 0.30 20060923 1128 B2825026 0.40 0.40 0.40 20060923 1729 B2825064 0.60 0.70 0.60 20060923 2330 B2825041 0.40 0.50 0.50 20060924 0529 B2825039 0.30 0.30 0.30 20060924 1729 B2825025 0.20 0.30 0.20 20060924 2329 B2825032 0.30 0.40 0.40 20060925 0529 B2824234 0.20 0.30 0.20 |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/28/2006 | 1728 | 12/31/9999 | 2359 |
Subject: | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The output precision of the following variables was increased 20060928 alt changed from 1m to 0.1m dp changed from 0.1degC to 0.01degC pres changed from 0.1 hPa to 0.01 hPa RH changed from 1%RH to 0.01%RH tdry changed from .1degC to 0.01degC Note that the increase in precision does not necessarily imply an increase in accuracy. Users are cautioned to continue to use their best scientific judgement when using these or any other data. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2006 | 1530 | 12/07/2006 | 1420 |
Subject: | SGP/CSPHOT/C1 - Unit #99 removed for upgrade |
DataStreams: | sgpcsphotppC1.00, sgpcsphotppC1.a1, sgpcsphotalmC1.00, sgpcsphotalmC1.a1, sgpcsphotaotC1.00, sgpcsphotaotC1.a1, sgpcsphotsizeC1.00, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.00, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.00, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.00, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.00, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.00, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.00, sgpcsphotcoarsepfn1C1.a1 |
Description: | S/N 99 was returned to Aeronet for calibration/modification at the end of Sept. On return, the upgraded and recalibrated instrument was relocated to be next to the SWS. |
Measurements: | sgpcsphotalmC1.a1:
sgpcsphotcoarsepfn1C1.00:
sgpcsphotsizeC1.a1:
sgpcsphottotalpfn1C1.00:
sgpcsphotalm1duboC1.00:
sgpcsphottotalpfn1C1.a1:
sgpcsphotaotfiltC1.00:
sgpcsphotfinepfn1C1.00:
sgpcsphotsizeC1.00:
sgpcsphotalmC1.00:
sgpcsphotaotfiltC1.a1:
sgpcsphotppC1.a1:
sgpcsphotppC1.00:
sgpcsphotaotfiltqaC1.a1:
sgpcsphotfinepfn1C1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotaotfiltqaC1.00:
sgpcsphotaotC1.00:
sgpcsphotcoarsepfn1C1.a1:
sgpcsphotaotC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/27/2006 | 2331 | 11/28/2006 | 0056 |
Subject: | SGP/SONDE/C1 - RH Sensor failure |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The differences between the two RH sensors on this sonde are unreasonably high (~20%). As a result the reported RH values oscillate by this amount during the times the sensors are alternately heated. After the heating stops, the reported RH comes from the sensor reading the higher value. There is no way of knowing if this is the correct value. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2007 | 1912 | 04/12/2007 | 2107 |
Subject: | SGP/AOS/C1 - Humidifier controller failure |
DataStreams: | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | Watlow PID controller which controls the humidifier stopped working. This mostly affects calculated fits of fRH |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
sgpaosC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/18/2007 | 0000 | 02/05/2007 | 2359 |
Subject: | SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode) |
DataStreams: | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
Description: | There were problems associated with the implementation of "cloud mode" on the upgraded CSPHOT system resulting from problems with the programming on the internal EPROM. The "cloud mode" did not work properly and other observations were also affected. For example, early morning sun and almucantar observations were missing. On 4/30/2007, the instrument was re-installed with cloud mode and was verified to be working. |
Measurements: | sgpcsphotalmC1.a1:
sgpcsphotsizeC1.a1:
sgpcsphotppC1.a1:
sgpcsphotaotfiltqaC1.a1:
sgpcsphotfinepfn1C1.a1:
sgpcsphottotalpfn1C1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotcoarsepfn1C1.a1:
sgpcsphotaotC1.a1:
sgpcsphotaotfiltC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2007 | 0000 | 04/29/2007 | 2359 |
Subject: | SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode) |
DataStreams: | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
Description: | The instrument was temporarily replaced while the primary instrument was out for repairs. Data should be unaffected, however, zenith observations are not available during this time period. On 4/30/2007, the primary instrument was re-installed with cloud mode and was verified to be working. |
Measurements: | sgpcsphotalmC1.a1:
sgpcsphotsizeC1.a1:
sgpcsphotppC1.a1:
sgpcsphotaotfiltqaC1.a1:
sgpcsphotfinepfn1C1.a1:
sgpcsphottotalpfn1C1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotcoarsepfn1C1.a1:
sgpcsphotaotC1.a1:
sgpcsphotaotfiltC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/11/2007 | 0940 | 07/24/2007 | 2205 |
08/17/2007 | 2140 | 08/30/2007 | 1900 |
Subject: | SGP/AOS/C1 - CPC failure |
DataStreams: | sgpaosC1.a1 |
Description: | The Condensation Particle Counter stopped recording counts. Upon inspection the tech found that water had condensed in the reservoir. The CPC was shipped back to the mentor for repair and a replacement CPC from NOAA was sent to the site. The replacement Condensation Particle Counter stopped measuring particle counts and was removed and returned to NOAA. The thermoelectric cooler in the device had stopped working. The ARM CPC that had previously been sent back to NOAA for repair was fixed and returned to SGP. |
Measurements: | sgpaosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2007 | 1750 | 12/22/2007 | 2130 |
Subject: | SGP/THWAPS/C1 - RH Data Incorrect |
DataStreams: | sgpthwapsC1.b1 |
Description: | The RH data was incorrect during the times listed. Reason unknown. The sensor recovered on its own. |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/06/2008 | 0000 | 02/06/2008 | 2359 |
Subject: | SGP/ORG/C1 - Frost on lens |
DataStreams: | sgporgC1.b1 |
Description: | Frost build up on the instrument lenses caused a faulty precipitation measurement. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2008 | 0000 | 03/10/2008 | 1600 |
Subject: | SGP/ORG/C1 - Lens heater failure |
DataStreams: | sgporgC1.b1 |
Description: | Any measurements made in freezing conditions are suspect due to failure of the lens heaters. Users of the data can use the SMOS E13 data to determine if temperatures below 0 degrees C occurred. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/23/2007 | 2110 | 08/27/2007 | 1530 |
Subject: | SGP/TSI/C1 - Missing data |
DataStreams: | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsimovieC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/21/2008 | 0000 | 04/15/2008 | 1600 |
Subject: | SGP/TSI/C1 - Contamination of mirror |
DataStreams: | sgptsimovieC1.a1, sgptsicldmaskC1.a1, sgptsiskycoverC1.b1, sgptsiskyimageC1.a1 |
Description: | A persistent bird was landing on and polluting the mirror, multiple times throughout the day. Spikes were placed on the corners and top of the instrument (an affective deterrent in the past) but this bird had the agility to perch on the top-center of the mirror. |
Measurements: | sgptsicldmaskC1.a1:
sgptsiskyimageC1.a1:
sgptsimovieC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/22/2008 | 0000 | 07/24/2008 | 2359 |
Subject: | SGP/CSPHOT/C1 - Instrument failure |
DataStreams: | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
Description: | There was a distinct cosine curve in the AOD data, which indicated a problem with the instrument, possibly due to a bad eprom in the control box. The instrument was removed from service on 7/24/08 and replaced on 9/24/08. |
Measurements: | sgpcsphotalmC1.a1:
sgpcsphotsizeC1.a1:
sgpcsphotppC1.a1:
sgpcsphotaotfiltqaC1.a1:
sgpcsphotfinepfn1C1.a1:
sgpcsphottotalpfn1C1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotcoarsepfn1C1.a1:
sgpcsphotaotC1.a1:
sgpcsphotaotfiltC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/06/2006 | 1100 | 08/06/2006 | 1800 |
08/12/2006 | 1100 | 08/12/2006 | 2359 |
08/13/2006 | 2300 | 08/13/2006 | 2359 |
08/14/2006 | 1100 | 08/14/2006 | 1200 |
08/16/2006 | 1100 | 08/16/2006 | 1200 |
08/25/2006 | 1136 | 08/25/2006 | 1436 |
08/26/2006 | 1134 | 08/26/2006 | 1434 |
08/28/2006 | 0533 | 08/28/2006 | 0833 |
09/02/2006 | 1135 | 09/02/2006 | 1435 |
09/02/2006 | 1734 | 09/02/2006 | 2034 |
09/03/2006 | 0534 | 09/03/2006 | 0834 |
09/03/2006 | 1130 | 09/03/2006 | 1430 |
09/03/2006 | 1730 | 09/03/2006 | 2030 |
09/04/2006 | 1134 | 09/04/2006 | 1434 |
09/04/2006 | 1731 | 09/04/2006 | 2031 |
09/05/2006 | 1131 | 09/05/2006 | 1431 |
09/11/2006 | 0532 | 09/11/2006 | 0832 |
09/12/2006 | 1131 | 09/12/2006 | 1431 |
09/13/2006 | 1131 | 09/13/2006 | 1431 |
09/14/2006 | 1131 | 09/14/2006 | 1431 |
Subject: | SGP/SONDE/C1 - Suspect RH profile from 150-350 m above ground level |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Several radiosondes were noticed to have a very stark dry layer between 150 m and 350 m, where the RH dropped from approximately 60-80% (which I would take as close to the ambient conditions) to less than 2%. The character of these dropouts look like instrument issues, as it only a handful of radiosondes that appear to be affected. The quicklook images from the Raman lidar does not show any very dry layers, thus supporting the hypothesis that the RH measurements from these radiosondes (at least in this small ~200 m level) are in error. I should note that the temperature profiles look normal. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/28/2008 | 0000 | 07/28/2008 | 1200 |
Subject: | SGP/ORG/C1 - Erroneous precipitation observations |
DataStreams: | sgporgC1.b1 |
Description: | Precipitation observed by the optical rain gauge was not observed by the SMOS tipping bucket or by the disdrometer nearby. The optical rain gauge results should be considered erroneous. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/2008 | 0000 | 07/25/2010 | 2359 |
Subject: | SGP/CSPHOT/C1 - AOT 1640 channel data missing |
DataStreams: | sgpcsphotaotC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotaotfiltqaC1.a1 |
Description: | AOT 1640 channel data missing. The instrument deployed at SGP from September 2008 to July 2010 was not upgraded with this additional channel. |
Measurements: | sgpcsphotaotfiltqaC1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotaotfiltC1.a1:
sgpcsphotaotC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/2008 | 0112 | 01/06/2009 | 1912 |
Subject: | SGP/AOS/C1 - Pump failure and subsequent failure of humidified nephelometer |
DataStreams: | sgpaosC1.a1 |
Description: | The pump for the aerosol sampling system failed over a weekend. The humidifier continued to operate and soaked the inside of both the reference and wet nephelometers. The nephelometers were returned for repair. A replacement neph was installed on 2008-August 5 @1858 UTC. The nephs were repaired and returned to SGP in December 2008. The humidification system was rebuilt and installed on 2009 January 6 at 1912 UTC. |
Measurements: | sgpaosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/2009 | 0000 | 02/13/2009 | 2359 |
Subject: | SGP/THWAPS/C1 - Barometer intermittent |
DataStreams: | sgpthwapsC1.b1 |
Description: | Intermittent dropouts on the barometer data were occurring, with data reading low or missing. Loose wiring was the probable culprit. In most instances, only 1 minute of data was missing. Linear interpolation between the last known good point and the first good point following the dropout can be accomplished. |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2009 | 0000 | 01/15/2009 | 2359 |
01/23/2009 | 0000 | 01/23/2009 | 2359 |
01/26/2009 | 0000 | 01/26/2009 | 2359 |
01/27/2009 | 0000 | 01/27/2009 | 2359 |
Subject: | SGP/ORG/C1 - False precip measurements |
DataStreams: | sgporgC1.b1 |
Description: | False measurements of precipitation occurred due to icing or conditions where the dew point temperature became close to the air temperature. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2009 | 1730 | 01/06/2009 | 1730 |
Subject: | SGP/SONDE/C1 - Suspect RH values |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | RH values only are suspect for the duration of this radiosonde flight, exhibiting a "sawtooth" pattern. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/2008 | 0000 | 01/23/2009 | 2359 |
Subject: | SGP/THWAPS/C1 - Time stamp of data record incorrect |
DataStreams: | sgpthwapsC1.b1 |
Description: | Due to problems with the collector system, the datalogger was being time synched inappropriately. This problem was intermittent and did not affect every time stamp. The worst case time adjustments were approximately +/- 7 minutes. These were infrequent and most of the time adjustments were less than 7 minutes. |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2009 | 2000 | 07/10/2009 | 0000 |
Subject: | SGP/AOS/C1 - Annual maintenance |
DataStreams: | sgpaosC1.a1, sgpaosauxC1.a1, sgpaosccnC1.a1, sgpaip1ogrenC1.c1, sgpaipavg1ogrenC1.c1 |
Description: | The instruments were not connected to the inlet while they were being cleaned and calibrated. |
Measurements: | sgpaosC1.a1:
sgpaip1ogrenC1.c1:
sgpaipavg1ogrenC1.c1:
sgpaosauxC1.a1:
sgpaosccnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/17/2009 | 0000 | 11/27/2009 | 1745 |
Subject: | SGP/THWAPS/C1 - Wind speed incorrect |
DataStreams: | sgpthwapsC1.b1 |
Description: | The wind sensor was reporting 0 m/s winds for excessive periods of time and appeared to measure lower wind speeds than nearby co-located wind sensors. Sensor was replaced. |
Measurements: | sgpthwapsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2009 | 0000 | 10/01/2009 | 0000 |
Subject: | SGP/ORG/C1 - False reports of precip |
DataStreams: | sgporgC1.b1 |
Description: | False positive observations occur during foggy periods and the accompanying rain gauges should always be consulted. However, the period covered by this DQR was not foggy and false positive readings became an issue. The instrument was removed for repair in 10/1/2009. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 10/31/2009 | 2359 |
Subject: | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1 |
Description: | Attribute serial_number: In most cases, this field is not representative of the actual serial number of the instrument because the value did not change when an instrument changed locations or was replaced with a spare. Variable sum_backscatter: An out-of-range condition for the "sum of detected and normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 0.0999 /srad. This DQR also applies to a1 level data collected prior to b1 level. |
Measurements: | sgpvceil25kC1.b1:
sgpvceil25kB4.b1:
sgpvceil25kB6.b1:
sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/14/2009 | 0000 | 12/25/2009 | 2359 |
Subject: | SGP/ORG/C1 - Incorrect precipitation |
DataStreams: | sgporgC1.b1 |
Description: | The ORG has difficulty making correct observations of precipitation when the dew point temperature is high or when snow occults the sensor. Snow was definitely the culprit during 12/24 and 12/25. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/28/2010 | 2300 | 01/31/2010 | 1200 |
Subject: | SGP/ORG/C1 - Snow falsely identified as rain |
DataStreams: | sgporgC1.b1 |
Description: | Snow that obstructed the ORG's sensor was interpreted by the instrument as rain. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2010 | 2202 | 04/23/2010 | 2241 |
Subject: | SGP/VCEIL/C1 - Range normalization |
DataStreams: | sgpvceil25kC1.b1 |
Description: | The range gate data were not normalized during this period because, when the CL31 was first deployed, I was uncertain about this parameter and returned it to its default setting of "off". Range gate normalization was enabled after receiving the following from Vaisala: ''We do recommend to keep this 'profile noise_h2' setting on. If 'profile noise_h2' is off, then range correction of the signal would freeze at 2400 m, unless the algorithm has detected a cloud region. This had been designed to make profiles in CL-VIEW look less noisy and to emphasize the presence of clouds.'' |
Measurements: | sgpvceil25kC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/12/2002 | 0533 | 06/12/2002 | 0533 |
Subject: | SGP/SONDE/C1 - Sensor failure |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Temperature sensor failure on sonde. Data is incorrect, do not use. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2009 | 0000 | 10/01/2010 | 0000 |
Subject: | SGP/AOS/C1 - Data processing problem |
DataStreams: | sgpaosC1.a1, sgpnoaaaosC1.b1, sgpnoaaaosavgC1.b1 |
Description: | The AOS data was reprocessed for the AMF, SGP and NSA sites. There was an error in the processing of the corrections for the PSAP absorption signal such that a low pass filter was implemented for the scattering data used in these corrections.The difference between the corrected and previous data is < 0.05 Mm-1 (below the instrument detection limit) and should not have a significant effect on the previous data. Data will be reprocessed at a later time when more significant changes to the data processing are implemented. |
Measurements: | sgpnoaaaosavgC1.b1:
sgpaosC1.a1:
sgpnoaaaosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/14/2010 | 0000 | 10/18/2010 | 2359 |
Subject: | SGP/CSPHOT/C1 - Robot errors/Obstruction in tubes |
DataStreams: | sgpcsphotppC1.a1, sgpcsphotalmC1.a1, sgpcsphotaotC1.a1, sgpcsphotsizeC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotfinepfn1C1.a1, sgpcsphotaotfiltqaC1.a1, sgpcsphottotalpfn1C1.a1, sgpcsphotcoarsepfn1C1.a1 |
Description: | Data are questionable due to problems with the robot and possible obstruction in collimator tubes. |
Measurements: | sgpcsphotalmC1.a1:
sgpcsphotsizeC1.a1:
sgpcsphotppC1.a1:
sgpcsphotaotfiltqaC1.a1:
sgpcsphotfinepfn1C1.a1:
sgpcsphottotalpfn1C1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotcoarsepfn1C1.a1:
sgpcsphotaotC1.a1:
sgpcsphotaotfiltC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2007 | 1829 | 12/24/2007 | 1500 |
04/26/2008 | 0100 | 04/28/2008 | 1539 |
05/13/2010 | 1018 | 05/18/2010 | 1427 |
08/21/2010 | 0119 | 08/23/2010 | 1248 |
10/18/2010 | 1238 | 10/19/2010 | 1624 |
10/29/2010 | 1620 | 11/01/2010 | 1348 |
01/15/2011 | 1616 | 01/18/2011 | 1602 |
Subject: | SGP/AOS/C1 - Missing data |
DataStreams: | sgpaosC1.a1, sgpaosauxC1.a1, sgpaosccnC1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpaosC1.a1:
sgpaosauxC1.a1:
sgpaosccnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/08/2011 | 0000 | 03/08/2011 | 2359 |
Subject: | SGP/ORG/C1 - Failure to detect rain |
DataStreams: | sgporgC1.b1 |
Description: | The ORG failed to observe any rain during the rain event that took place on this day. Rain that occurred later in the month were detected. |
Measurements: | sgporgC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/2010 | 0115 | 10/11/2010 | 2359 |
10/19/2010 | 0000 | 10/19/2010 | 2359 |
10/22/2010 | 0000 | 10/22/2010 | 2359 |
11/11/2010 | 0000 | 11/12/2010 | 2359 |
11/15/2010 | 0000 | 11/17/2010 | 2359 |
Subject: | SGP/ORG/C1 - Incorrect precipitation measurements |
DataStreams: | sgporgC1.00, sgporgC1.b1 |
Description: | The ORG did not recorded any precip during the time period specified. Based on intercomparison plots with the TBRG at E13 there were precipitation events during this time. |
Measurements: | sgporgC1.b1:
sgporgC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2011 | 1300 | 02/18/2011 | 2200 |
Subject: | SGP/MET/E13 - PWD data incorrect/missing |
DataStreams: | sgpmetE13.b1 |
Description: | Data collection problems during the time period specified resulted in incorrect or missing PWD data. |
Measurements: | sgpmetE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/09/2010 | 0000 | 01/10/2011 | 2000 |
Subject: | SGP/MET/E13 - Missing PWD data |
DataStreams: | sgpmetE13.b1 |
Description: | PWD data were missing due to an accidental reset on the instrument. |
Measurements: | sgpmetE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/1996 | 0000 | 04/30/1996 | 2359 |
Subject: | Metadata for "Height" variable field |
DataStreams: | sgpmplC1.a0 |
Description: | The metadata defining the variable "Height" is incorrect. The metadata states that "Height" is the altitude of the BOTTOM of the range bins. In fact, "Height" is the altitude to the MIDDLE of the range bins. This amounts to an interpreted difference of 150 meters, since the range bins are 300 meters in width. The actual data values are unchanged, only interpretation of the altitude is different. This pertains to all existing data produces from the MPL02 at the SGP site. |
Measurements: | sgpmplC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/17/1997 | 0000 | 04/14/1997 | 2359 |
Subject: | Continuing signal degradation |
DataStreams: | sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1 |
Description: | Despite recent efforts (970310-970314) by the instrument mentor, signal degradation of the MPL has continued. The degradation has continued to the point that the effective range of the MPL is nearing 10 km. The instrument mentor and PI have concluded that an overhaul of the instrument by the vendor is in order. |
Measurements: | sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
DsgpmplC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/04/1997 | 1459 | 08/08/1997 | 1348 |
04/20/1998 | 1449 | 04/23/1998 | 2136 |
07/19/1999 | 1452 | 07/30/1999 | 1829 |
01/10/2000 | 1400 | 01/15/2000 | 0000 |
09/30/2002 | 1300 | 10/04/2002 | 1900 |
03/17/2003 | 1547 | 03/21/2003 | 2248 |
Subject: | SGP/AOS/C1 - Annual Maintenance |
DataStreams: | sgpaosC1.a0 |
Description: | The AOS Annual maintenance/calibration visit occurred during these periods. During these times, instruments were cleaned, calibrated, and when necessary, repaired. Instruments were online collecting data for some of the time; however, periods of contamination are probable because aerosol sampling lines were opened for inspection and cleaning and pumps were switched off for periods of time. Any data fields during this period that contain data should be considered incorrect. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/08/1998 | 1900 | 04/16/1998 | 1630 |
Subject: | SGP/AOS/C1 - Single wavelength nephelometer pump failure |
DataStreams: | sgpaosC1.a0 |
Description: | The pump failed on the single-wavelength nephelometer line. The vacuum gauge also failed, giving vacuum readings that made it appear that the pump was still working. Technicians reported that the pump was still working during this period, although the vacuum gauge read slightly lower than expected. The nephelometer was measuring aerosol scattering inside the scattering volume, which over time showed consistently low scattering values. This problem was difficult to diagnose given the faulty vacuum gauge and the fact that the site experienced relatively low ambient aerosol scattering values during this period. The repair was made just prior to the AOS annual maintenance visit in April 1998. The only field in the AOS data files that was affected was Field 29, "Bscat530nm". |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/1995 | 0000 | 05/26/1998 | 1910 |
Subject: | SGP/AOS/C1 - PSAP Flow Rate Change |
DataStreams: | sgpaosC1.a0 |
Description: | The AOS PSAP flow rate was reduce due to data becoming noisy at the end of each weekend, probably due to the decrease in the dynamic range of the instrument experienced when the filter is heavily loaded. The flow rate of the PSAP was decreased from its previous nominal value of 0.90 standard liters per minute to 0.75 standard liters per minute on 5/26/98 at 1910 GMT. This should lessen the aerosol deposit buildup at the end of the weekends |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/16/1997 | 2010 | 06/20/1997 | 1313 |
Subject: | SGP/AOS/C1 - Single-wavelength nephelometer errors |
DataStreams: | sgpaosC1.a0 |
Description: | Due to a malfunctioning bypass valve, the single wavelength nephelometer was not properly sampling ambient air. Thus, scattering values during this period are incorrect. The incorrect data field is "Bscat530nm". |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/24/1997 | 1652 | 06/26/1997 | 1847 |
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer failure |
DataStreams: | sgpaosC1.a0 |
Description: | The backscatter shutter on the TSI 3-wavelength nephelometer failed and the unit had to be replaced. Data are either missing or incorrect. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/30/1997 | 0707 | 07/08/1997 | 1946 |
08/27/1997 | 1400 | 09/16/1997 | 1355 |
Subject: | SGP/AOS/C1 - Condensation Particle Counter failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | During the time periods specified, the AOS Condensation Particle Counter was down for maintenance. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/1997 | 0936 | 07/03/1997 | 1556 |
08/01/1997 | 1329 | 08/08/1997 | 1348 |
05/05/1998 | 0926 | 06/16/1998 | 1505 |
06/09/1999 | 0824 | 07/26/1999 | 2205 |
09/08/2000 | 0426 | 10/13/2000 | 1630 |
05/17/2002 | 0602 | 05/20/2005 | 1847 |
05/23/2002 | 2011 | 05/31/2002 | 1258 |
09/09/2002 | 0000 | 10/07/2002 | 1905 |
Subject: | SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS Optical Particle Spectrometer (PCASP-X sizing probe) was down during these periods. This lowers the laser reference voltage and results in inaccurate sizing. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/1997 | 2023 | 12/15/1997 | 1834 |
Subject: | SGP/AOS/C1 - Instrument communications problems |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | Several of the AOS instruments apparently lost communications with the AOS computer during this period. These instruments were the TSI 3-wavelength nephelometer, the PSAP light absorption photometer, and the Dasibi ozone instrument. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/29/1997 | 1340 | 07/31/1997 | 2236 |
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer data missing |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS TSI 3-wavelength nephelometer lost communications with the AOS data system during this period. Cause of the communications break is unknown. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/29/1997 | 1348 | 09/02/1997 | 1326 |
Subject: | SGP/AOS/C1 - Ozone instrument left in span mode |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | AOS Ozone instrument was left in span mode over the weekend. Span value was logged during this period. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/15/1997 | 1540 | 09/16/1997 | 1420 |
Subject: | SGP/AOS/C1 - Line 8 bypass in wrong position |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The Line 8 bypass valve was stuck in the wrong position. Consequently, air was not being drawn through the TSI 3-wavelength nephelometer and the PSAP light absorption photometer, and thus they were not measuring ambient (outdoor) aerosols. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/23/1997 | 1440 | 09/24/1997 | 1700 |
Subject: | SGP/AOS/C1 - Light absorption photometer (PSAP) error |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS continuous light absorption photometer (PSAP) showed inaccurate data during this period due to a filter being inserted into the optical assembly incorrectly. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/1997 | 2030 | 12/01/1997 | 1514 |
03/20/1998 | 1849 | 03/23/1998 | 2147 |
Subject: | SGP/AOS/C1 - Ozone Instrument Communication Failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS Ozone instrument apparently lost communications with the AOS computer during these periods. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/1998 | 1634 | 01/08/1998 | 1634 |
Subject: | SGP/AOS/C1 - Ozone Instrument data incorrect |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | A filter of the wrong type was placed in the ozone instrument intake line. This filter destroys ozone, and consequently the measured ozone values during this period are abnormally low. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/1998 | 0435 | 07/28/1998 | 2053 |
Subject: | SGP/AOS/C1 - Aerosol sampling system and nephelometer failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The electronic valve that switches the aerosol sampling system from sampling the total aerosol (D<10 um) to the submicrometer (D<1 um) aerosol began having intermittent positioning problems. All 3-wavelength nephelometer and light absorption photometer data collected during this time period should be viewed as suspect, since we can't be sure what particle size range was being sampled at any time. During this interval, the nephelometer lamp became unstable and finally blew, giving no nephelometer data for the end of this period. The period of lamp failure in the AOS data files can be recognized by prolonged periods of missing value codes for aerosol scattering and nephelometer housekeeping channels. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/05/1998 | 1558 | 11/12/1998 | 0501 |
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer data missing |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | The AOS data system lost communications initially with the 3-wavelength TSI nephelometer. A communications port on the Sun workstation became locked, and attempts to unlock it were unsuccesful. Stopping and restarting the data collection software did not solve the problem. Missing value codes were being generated for all TSI nephelometer measurements and parameters. The decision was made to reboot the workstation. On 981110, at 1555 GMT, the workstation was rebooted. We discovered then that we did not have the proper root user password to log back onto the system and restart the software. From 981110 (1555GMT) to 981112 (0501GMT) no data were being logged by the AOS data system. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/1998 | 1830 | 10/08/1998 | 1925 |
Subject: | SGP/AOS/C1 - Intermittent leak in AOS spare sampling line and thermal sensitivity |
DataStreams: | sgpaosC1.a0 |
Description: | Starting on 980619, periodic fluctuations in several of the measured AOS parameters (e.g., Aerosol light absorption coefficent, TSI nephelometer relative humidity, condensation particle counts, etc.) were observed. The start of these fluctuations coincided exactly with the shutdown of the AOS for power washing of the wooden stairs and stack platform. Numerous attempts at troubleshooting were conducted via telephone with technicians at the site. These concentrated on 1) trying to find an electrical noise problem or 2) determining whether our stack heating unit was somehow producing particles. Tests were devised to check both of these possibilities, and both were determined to be non-problems. The troubleshooting of this signal fluctuation problem was compounded and delayed by the concurrent unrelated electronic ball valve problem (see AOS DQR#980731.1). Pat Sheridan and Jim Wendell from the NOAA Aerosols Group went to the SGP Central Facility to diagnose and repair the problem. All electromagnetic noise possibilities, including bad grounds and RF fields were checked. These were not causing the fluctuations, which varied in period from ~15-30 minutes. Upon dismantling the insulated air intake assembly inside the trailer, a minute crack was found in one of the spare sampling lines at its connection to the manifold. This line was one of the original installed by the previous mentor. Repair of this line break essentially repaired the fluctuation problem, although this extensive troubleshooting revealed a slight temperature dependence for some of our reference signals (more on this below). Our explanation of this problem is as follows. When the AOS stairs were power washed, either the activities associated with power washing (e.g. people or compressors on the platform) or lowering the stack caused enough vibration to cause a hairline break in the spare sampling line at the connection with the manifold. We believe this tubing is high-density polyethylene, which is semi-rigid, and it has now been replaced with less brittle material. The routine daily system zero checks established by the previous mentor would not have detected this leak problem, because overpressurization of the manifold with particle-free air showed up as good zero checks in all instruments and some of this clean air would have simply flowed out of the spare line tubing crack. Since the crack was beneath at least two layers of foam insulation which itself was covered with foam-backed metallic tape, we believe that free air flow of trailer air to the crack was not likely. However, during periods when the large air conditioning unit was on, pressurization of the trailer caused air to slowly leak into the spare sampling line and back into the manifold and other sampling lines. Upon arrival at the site, we found the fan for the A/C system operating only when the A/C compressor came on. We were informed by Dan Nelson, Site Engineer, that this fan is supposed to stay on all the time. Our data suggest that this fan has been off since before the problem began. This is fortuitous, because the trailer was not continually pressurized and room air was not sampled continuously over this period. Thus, only a portion of the data are of questionable quality. This leak was not immediately obvious (to AOS technicians or to us) because of its concealed location and because some aerosol measurements (e.g., particle number concentrations, aerosol light absorption coefficents, etc.) did not change dramatically during these periods (i.e., the aerosols brought inside the trailer through the cooling system were often not much different in concentration or optical properties than were aerosols sampled at the top of the stack). Thus data during the A/C periods will be labeled as questionable. We will institute a new leak check/zero check procedure which should catch leaks of this type. The old system zero check devised by the previous mentor was insufficient to find this leak. The A/C unit in the AOS trailer is more than adequate to cool that space. The cold air that comes out of the vents is probably >20F cooler than trailer air. This cold air causes slight fluctuations in the lamp voltages and reference signals of several of our instruments. We expect this problem to be more severe in the summertime because of increased air conditioner use and indoor temperature swings. Fortunately, these signal fluctuations are not observed in the final processed signals from these instruments. They do, however, suggest that a gentler cooling of the trailer should be considered. Possibilities for this could include: 1) Installation of a smaller air conditioning unit 2) Changing the ratio of outside air mixed in with the cooled air 3) Venting the exhaust from the cabinets into the air recirculating system to preheat the cooled air. We realize that these suggestions may not be in line with the notion of efficient cooling of the trailer. However, we feel that the root cause of the observed temperature fluctuations is that the air conditioning unit has far more capacity than is needed by the AOS trailer. A smaller air conditioner, properly matched to the heat load of the trailer, would probably be a more efficient solution. Since the cooling of the trailer generally was faster than the warming-up period, a majority of data should be valid. Also, not all measurements appeared questionable (i.e., the data did not appear to change when the A/C unit came on). We have flagged all aerosol data as "questionable" during A/C "on" periods because of the likelihood that at least some mixing of trailer air with ambient air occurred. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/27/1992 | 0000 | 05/31/2002 | 2359 |
Subject: | SGP/SONDE - Dry bias in sonde RH |
DataStreams: | sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
Description: | Vaisala has confirmed ARM findings of an apparent dry bias in the relative humidity measured by RS-80H radiosondes. The cause of the dry bias is thought to be contamination of the humidity sensor by volatile organic substances originating from some plastic parts of the radiosonde. The amount of contamination is a function of the time between the date of sonde manufacture and its use. All RS-80H sondes manufactured before week 34 of 1998 will show this bias. After week 34 of 1998 Vaisala changed its packaging to reduce, but not eliminate the contamination problem. Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala enclosed the sensor boom in an inert plastic shield, thereby eliminating the contamination that caused the dry bias. Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002 at the NSA, ARM has moved to using RS-90 radiosondes. These sondes are not subject to the contaminatino that caused the dry bias. Vaisala is in the process of developing an algorithm that can be used to estimate the correct RH from knowledge of the sonde age. All of the ARM sounding data have sufficient metadata available to apply the correction. Additionally, ARM has funded a Science Team effort (Milosevich) to develop a 'best' correction algorithm for the RS-80 radiosonde humidity data. When completed this algorithm will allow us to reprocess the accumulated RS-80 data and produce a new data platform with what we hope will be more accurate data. |
Measurements: | sgpsondeptuC1.00:
sgpsondeB4.a1:
sgpsondeB4.a0:
DsgpsondeptuB4.00:
sgpsondewrprB1.00:
DsgpsondeC1.a1:
DsgpsondeB5.a0:
DsgpsondeC1.a0:
sgpsondewrpnC1.a1:
sgpsondewnprC1.a1:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnB5.00:
sgpsondewrpnB4.a0:
sgpsondewnpnB1.a0:
sgpsondewnpnB1.a1:
DsgpsondeB5.a1:
sgpsondewrprB4.a1:
sgpsondewrpnB4.a1:
DsgpsondeB4.a0:
sgpsondewrpnB6.00:
DsgpsondeB4.a1:
sgpsondewrprB4.a0:
DsgpsondeptuB6.00:
sgpsondewnpnC1.a0:
sgpsondewrpnB6.a0:
DsgpsondeptuB5.00:
sgpsondewnpnC1.a1:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB4.00:
sgpsondewrpnB6.a1:
DsgpsondenogcptucalcB4.c1:
DsgpsondeC1.00:
DsgpsondeptuC1.00:
DsgpsondeptucalcB1.c1:
DsgpsondeptucalcB5.c1:
sgpsondewrpnB1.00:
sgpsondewrpnB1.a1:
sgpsondewrpnB1.a0:
DsgpsondeptuB1.00:
DsgpsondeB1.00:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnB5.c1:
sgpsondewrpnB5.a0:
sgpsondewrpnB5.a1:
DsgpsondenogcptucalcB1.c1:
sgpsondeC1.00:
sgpsondewrprB4.00:
sgpsondeB4.00:
sgpsondewrprB1.a0:
sgpsondewrprC1.00:
sgpsondewrprB1.a1:
sgpsondewnpnB5.a0:
sgpsondeB1.a0:
DsgpsondeB5.00:
sgpsondewnpnB5.a1:
sgpsondeB1.a1:
sgpsondewnpnB4.a1:
sgpsondewnpnB6.a0:
sgpsondewnpnB6.a1:
sgpsondewnpnB4.a0:
DsgpsondenogcwrpnB1.c1:
sgpsondeB5.00:
sgpsondeB6.00:
DsgpsondenogcptucalcB5.c1:
sgpsondewrprB5.00:
DsgpsondeptucalcC1.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeC1.a1:
sgpsondeC1.a0:
DsgpsondeB1.a0:
sgpsondewrpnC1.00:
sgpsondeB5.a0:
sgpsondewrpnB4.00:
sgpsondeB5.a1:
DsgpsondeB1.a1:
sgpsondewrprC1.a1:
sgpsondewrprB5.a0:
sgpsondewrprB5.a1:
sgpsondewrpnC1.a0:
sgpsondewnprC1.a0:
sgpsondeB1.00:
sgpsondewrprC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/1998 | 0000 | 01/23/1999 | 2359 |
Subject: | SGP/MPL - Missing data due to blown detector |
DataStreams: | sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1 |
Description: | Sometime early 11/11 the detector on the MPL-004 blew out. The Detector was replaced by Albert Mendoza. The instrument was operational on Jan. 23, 1999. Link this to P981119.2 that reported the blown detector and the corrective action taken |
Measurements: | sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
sgpmplnor1campC1.c1:
DsgpmplhrC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/1999 | 1556 | 05/14/1999 | 1445 |
Subject: | SGP/AOS/C1 - Ozone Instrument Failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | A malfunction occurred with the AOS surface ozone instrument during the period 990507 1556 GMT to 990514 1445 GMT. The instrument reported an ozone concentration of 9.91e-01 ppm (991 ppb) continuously during this time. Quality checking of the data the following week revealed that the problem began at about the time weekly maintenance check was made on Friday. The problem continued until the next weekly maintenance check was done. Site Ops was notified by the mentor of the problem on Friday, 5/14/99, and a technician was sent to inspect the system. No switches on the instrument front panel were found in the wrong position (for example, if the instrument was inadvertantly left in a calibration mode). By the time the technician arrived at the trailer, the instrument appeared to be working correctly. No explanation is given as to why these erroneous values were being generated by the ozone instrument, except that possibly it locked up with the throwing of the weekly preventative maintenance switch and this problem was not corrected until the same switch was thrown the following week. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/21/1999 | 1413 | 05/27/1999 | 1819 |
Subject: | SGP/AOS/C1 - Invalid absorption data |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | During the period noted, a valve position error with the 1-um/10-um impactor switching valve occurred. The result of this error was to invalidate all switched data. The software correctly inserted missing value codes in the nephelometer data, but the PSAP light absorption photometer for some reason reported a constant value over this period. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/21/1999 | 1348 | 05/27/1999 | 1822 |
Subject: | SGP/AOS/C1 - Incorrect absorption and scattering data |
DataStreams: | sgpaosC1.a0 |
Description: | The electronically switched valve that alternately switches flow through 1-um and 10-um impactors showed an error during this time period. This error invalidated all downstream data. In the raw data files, aerosol light scattering coefficients for the TSI reference and humidified nephelometers were assigned missing value codes. The aerosol light absorption coefficient was observed to stick at a constant value over this period. The problem went away after the weekly maintenance was performed, although nothing specific was done to the valve. The flipping of the maintenance switch appears to have solved the problem. |
Measurements: | sgpaosC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/18/1999 | 1628 | 06/22/1999 | 1537 |
06/25/1999 | 1630 | 06/28/1999 | 1343 |
Subject: | SGP/AOS/C1 - Ozone instrument error |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
Description: | A switch on the front panel of the ozone instrument was left in the wrong position. This resulted in a bad value for ozone concentration being logged for these periods. |
Measurements: | sgpaosC1.a0:
sgpaosauxC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/27/1999 | 1445 | 10/14/1999 | 2230 |
Subject: | SGP/THWAPS - RH values low by factor of 1.1 |
DataStreams: | sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1, DsgpthwapsC1.a1, DsgpthwapsC1.b1 |
Description: | Because of instrument mentor stupidity, all C1 THWAPS RH data collected from the begin date of this DQR are low by a factor of 1.1. This error also will affect the vapor pressure data. The problem is that the CSI data logger is expecting the data to be scaled 0-100%RH on the range 0-1V, but it is now being scaled 0-110%RH on the range 0-1V. |
Measurements: | sgpthwapsC1.b1:
sgpthwapsC1.a1:
sgpthwapsC1.00:
DsgpthwapsC1.a1:
DsgpthwapsC1.b1:
|