DQR ID | Subject | Data Streams Affected |
---|---|---|
D050321.1 | PYE/SKYRAD/M1 - Reprocessed: Installation problems | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
D050321.6 | PYE/TSI/M1 - Misalignment | pyetsimovieM1.a1, pyetsicldmaskM1.a1, pyetsiskycoverM1.b1, pyetsiskyimageM1.a1 |
D050405.1 | PYE/SKYRAD/M1 - Reprocessed: IRT configuration and calibration | pyeskyradM1.00, pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
D050412.1 | PYE/MET/M1 - Data questionable | pyesmet60sM1.b1 |
D050503.2 | PYE/TSI/M1 - water in lens | pyetsiM1.00, pyetsimovieM1.a1, pyetsicldmaskM1.a1, pyetsiskycoverM1.b1, pyetsiskyimageM1.a1 |
D050811.6 | PYE/SONDE/M1 - Broken RH sensor | pyesondewnpnM1.b1 |
D050823.1 | PYE/SONDE/M1 - Bad temperature and RH | pyesondewnpnM1.b1 |
D050912.3 | PYE/SONDE/M1 - Bad RH sensor | pyesondewnpnM1.b1 |
D050912.4 | PYE/SONDE/M1 - Bad RH sensor | pyesondewnpnM1.b1 |
D050923.1 | PYE/SKYRAD/M1 - IRT bias | pyeskyrad60sM1.b1 |
D060630.43 | PYE/SKYRAD/M1 - Reprocess: Longwave Calibration error | pyeskyrad60sM1.b1 |
D070124.2 | PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwave | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
D080428.8 | PYE/SMET/M1 - Reprocess: ORG Data has very small rainrate values | pyesmet60sM1.b1 |
D081022.10 | PYE/SMET/M1 - Wind Speed data contain offset due to induced voltage | pyesmet60sM1.b1 |
D100216.2 | PYE/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | pyevceil25kM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/14/2005 | 0000 | 04/30/2005 | 2359 |
Subject: | PYE/SKYRAD/M1 - Reprocessed: Installation problems |
DataStreams: | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
Description: | The installation of the SKYRAD instrument was not without problems. During all or part of the time period specified the calibrations were incorrect or incomplete, the downwelling diffuse and direct normal leads were switched, and the shadowband was severely out of alignment. These data have been reprocessed to apply corrections as follows: 1) NIP & PSP-diffuse leads swapped 20050214-20050412.1645 - swapped the NIP and PSP columns in the raw data files - backed out the original, incorrect calibrations - applied correct calibrations 2) PSP-diffuse calibration error 050214-050215 - backed out the original, incorrect calibration - applied correct calibrations 3) PSP-DS cal error 050214-050215 - backed out the original, incorrect calibration - applied correct calibration 4) NIP cal error 050214-050215 and 050218-050401 - backed out the original, incorrect calibrations - applied correct calibration The reprocessed data were archived in February, 2007. Users are encouraged to still use these data with caution only after a thorough quality review to be certain the data meet their requirements. |
Measurements: | pyeskyrad60sM1.b1:
pyeskyrad20sM1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 1525 | 04/07/2005 | 1715 |
Subject: | PYE/TSI/M1 - Misalignment |
DataStreams: | pyetsimovieM1.a1, pyetsicldmaskM1.a1, pyetsiskycoverM1.b1, pyetsiskyimageM1.a1 |
Description: | The TSI was not aligned with true north. |
Measurements: | pyetsiskycoverM1.b1:
pyetsiskyimageM1.a1:
pyetsimovieM1.a1:
pyetsicldmaskM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/17/2005 | 1821 | 03/11/2005 | 2032 |
Subject: | PYE/SKYRAD/M1 - Reprocessed: IRT configuration and calibration |
DataStreams: | pyeskyradM1.00, pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
Description: | The configuration of the IRT was inadvertently set to default and the program of the data loggers were changed to that used at TWP.C3. This caused the calibration of the data to be wrong. It was corrected by reconfiguring the IRT and changing the conversion factors in the data logger program. These data have been reprocessed to apply correct calibrations and the reprocessed data were archived in February, 2007. |
Measurements: | pyeskyrad60sM1.b1:
pyeskyradM1.00:
pyeskyrad20sM1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/11/2005 | 0000 | 03/14/2005 | 2359 |
Subject: | PYE/MET/M1 - Data questionable |
DataStreams: | pyesmet60sM1.b1 |
Description: | During the listed time period, the AMF was in the beginning phase of deployment. Data during this time may not be representative and should be used with caution. |
Measurements: | pyesmet60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/23/2005 | 0032 | 05/07/2005 | 1822 |
Subject: | PYE/TSI/M1 - water in lens |
DataStreams: | pyetsiM1.00, pyetsimovieM1.a1, pyetsicldmaskM1.a1, pyetsiskycoverM1.b1, pyetsiskyimageM1.a1 |
Description: | The lower half of the TSI images were blurry due to water in the camera lens and/or filter. The problem was corrected when both were cleaned. |
Measurements: | pyetsiskycoverM1.b1:
pyetsiskyimageM1.a1:
pyetsimovieM1.a1:
pyetsicldmaskM1.a1:
pyetsiM1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2005 | 1129 | 08/02/2005 | 1225 |
Subject: | PYE/SONDE/M1 - Broken RH sensor |
DataStreams: | pyesondewnpnM1.b1 |
Description: | One of the RH sensors on this radiosonde was bad. The RH oscillates rapidly between near 0 and ambient up to approximately 11 km. The near-zero values are incorrect. |
Measurements: | pyesondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/30/2005 | 0528 | 06/30/2005 | 0711 |
Subject: | PYE/SONDE/M1 - Bad temperature and RH |
DataStreams: | pyesondewnpnM1.b1 |
Description: | The temperature appears to be approximately 10 degC too high during the entire sounding. This also causes the RH to be too low. Most likely the problem was a bad temperature sensor. |
Measurements: | pyesondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/31/2005 | 1130 | 08/31/2005 | 1140 |
Subject: | PYE/SONDE/M1 - Bad RH sensor |
DataStreams: | pyesondewnpnM1.b1 |
Description: | The RH sensor heating circuit failed on this sounding. RH values during the first part of the sounding oscillate between a reasonable value and a very low value. It appears that (a) the heating was out of phase, and (b) incorrect values were being reported during the first 10 minutes or so of flight. |
Measurements: | pyesondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/29/2005 | 1128 | 08/29/2005 | 1340 |
Subject: | PYE/SONDE/M1 - Bad RH sensor |
DataStreams: | pyesondewnpnM1.b1 |
Description: | Two problems here - failure of the RH sensor heating circuit and a bad RH sensor. |
Measurements: | pyesondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/03/2005 | 0200 | 09/14/2005 | 2359 |
Subject: | PYE/SKYRAD/M1 - IRT bias |
DataStreams: | pyeskyrad60sM1.b1 |
Description: | The SKYRAD IRT measured lower sky temperatures than the AERI. This may have been due to a dirty mirror or lens. |
Measurements: | pyeskyrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0000 | 09/14/2005 | 0000 |
Subject: | PYE/SKYRAD/M1 - Reprocess: Longwave Calibration error |
DataStreams: | pyeskyrad60sM1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | pyeskyrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2005 | 0000 | 09/14/2005 | 2359 |
Subject: | PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwave |
DataStreams: | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
Description: | The excitation delays used in measuring the PIR1 case thermistor, "Case1", and the PIR2 dome thermistor, "Dome2", were discovered to have been incorrectly set to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were installed. The result of no delay in these measurements results in an error in the measured resistance of the thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 irradiances. The absolute value of the errors are inversely proportial to temperature. At Pt Reyes, we are unable to determine if the excitation delay problem was present. The first Skyrad datalogger program installed at PYE was correct but later versions modified and uploaded in March and April of 2005 may have had the Delay0 problem. The problem also can not be determined from the data. Pt. Reyes temperature fluctuations throughout the year are maritime and fall into a relatively narrow range in 2005 between 2.5-20C. The Delay0 problem introduces larger errors into PIR1 and PIR2 irradiance calculations as the temperature drops. At the lowest temperature at Pt Reyes in 2005 (approx 2.5C occurring in March) the largest PIR1 error would be -.48 W/m2 and PIR2 +.38 W/m2. The scale of these errors are smaller than the resolution of the instrument and are lost in the normal variation of the instrument readings. Cursory review of the thermistor data during cold periods does not show any discernable biases. Furthermore, the data logger programming "error" due to the Delay0 problem is an order of magnitude less than the total estimated measurement uncertainty of the pyrgeometer data from any ARM installation (+/- 5 W/sq m for 4-coeff and +/- 10 W/sq m for 2-coeff calibrations). Due to these issues, no Delay0 corrections will be applied to PYE Skyrad data. |
Measurements: | pyeskyrad60sM1.b1:
pyeskyrad20sM1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0000 | 09/15/2005 | 2359 |
Subject: | PYE/SMET/M1 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | pyesmet60sM1.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We are reprocessing the data to remove these small values and are adjusting the collection program to remove them before ingest. |
Measurements: | pyesmet60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0000 | 09/01/2005 | 2359 |
Subject: | PYE/SMET/M1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | pyesmet60sM1.b1 |
Description: | The marine model of the RM Young wind sensor needs twisted pair shielded cable. The manufacturer did not originally supply the pigtail with twisted pair shielded cable. Use of twisted pair shielded cable for the rest of the cable run to the logger was also not specified. This caused an induced voltage in the wind speed line from the wind direction excitation. The induced voltage varied from sensor to sensor and probably changed anytime the cable was replaced or parts of the wind sensor were repaired or replaced. The induced voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s. |
Measurements: | pyesmet60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0000 | 09/15/2005 | 2359 |
Subject: | PYE/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | pyevceil25kM1.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. |
Measurements: | pyevceil25kM1.b1:
|