| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D060106.15 | NIM/ECOR/M1 - Missing data | nim30ecorM1.b1 |
| D060307.1 | NIM/MWRP/M1 - Software problem | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| D060419.3 | NIM/MWRP/M1 - Instrument noise problem | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| D060420.5 | NIM/MWRP/M1 - IRT Sensor Calibration | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| D060523.3 | NIM/AOS/M1 - Mass flow controller failure | nimaosccnM1.a1, nimaosM1.a1, nimaosauxM1.a1 |
| D060523.4 | NIM/AOS/M1 - Nephelometer failure | nimaosM1.a1 |
| D060530.1 | NIM/ECOR/M1 - Flux Data Suspect for Some Wind Directions | nim30ecorM1.b1 |
| D060602.2 | NIM/MWRP/M1 - Reprocessed: IRT configuration setting error | nimmwrpM1.b1 |
| D060619.1 | NIM/MWRP/M1 - Reprocessed - New retrieval coefficients | nimmwrpM1.b1 |
| D060713.1 | NIM/MWRP/M1 - 51.25 GHz channel calibration drifted | nimmwrpM1.b1 |
| D060929.1 | NIM/MWRP/M1 - Sun in radiometer's field of view | nimmwrpM1.b1 |
| D061003.3 | NIM/MWRP/M1 - IRTs do not agree with AERI | nimmwrpM1.b1 |
| D061117.1 | NIM/MWRP/M1 - Reprocessed: K-band calibration drift corrected | nimmwrpM1.b1 |
| D061206.1 | NIM/AOS/M1 - Bypass valve failure | nimaosM1.a1, nimaosauxM1.a1, nimaosccnM1.a1 |
| D061206.2 | NIM/AOS/M1 - Impactor switch stuck in 10 micron mode | nimaosM1.a1 |
| D061206.3 | NIM/AOS/M1 - Flow controller failure | nimaosM1.a1, nimaosauxM1.a1, nimaosccnM1.a1 |
| D061207.3 | NIM/AOS/M1 - CCN failure | nimaosccnM1.a1 |
| D061215.5 | NIM/AOS/M1 - Missing data | nimaosccnM1.a1, nimaosM1.a1, nimaosauxM1.a1 |
| D070215.5 | NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraft | nim30ecorM1.b1 |
| D080428.6 | NIM/MET/M1/S1 - Reprocess: ORG Data has very small rainrate values | nimmetS1.b1 |
| D081022.12 | NIM/MET/S1 - Wind Speed data contain offset due to induced voltage | nimmetS1.b1 |
| D100216.3 | NIM/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | nimvceil25kM1.b1 |
| D101020.4 | NIM/AOS/M1 - Data processing problem | nimnoaaaosM1.b1, nimnoaaaosavgM1.b1, nimaosM1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/11/2005 | 0830 | 12/13/2005 | 1230 |
| 01/28/2006 | 0330 | 01/30/2006 | 0800 |
| 08/25/2006 | 1930 | 08/29/2006 | 0730 |
| Subject: | NIM/ECOR/M1 - Missing data |
| DataStreams: | nim30ecorM1.b1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | nim30ecorM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/28/2006 | 1100 | 03/07/2006 | 1615 |
| Subject: | NIM/MWRP/M1 - Software problem |
| DataStreams: | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| Description: | The MWRP computer failed and it was cloned with a new Gx620. Soon after, the MWRP program started to crash and was intermittent. Data were lost on March 3, 4, 5. On March 7 the program was forcefully ended and restarted. This appears to have cleared the problem. The instrument has been running since. |
| Measurements: | nimmwrpM1.00:
nimmwrpM1.b1:
nimmwrprawM1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/2006 | 0000 | 01/08/2007 | 0000 |
| Subject: | NIM/MWRP/M1 - Instrument noise problem |
| DataStreams: | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| Description: | There are spikes and elevated noise in MWRP data. The origine of the spikes is RF interference from various sources. All brightness temperatures are affected, but in particular the 5 K-band channels. LWP retrievals are noisy and affected by spikes as a result. |
| Measurements: | nimmwrpM1.00:
nimmwrpM1.b1:
nimmwrprawM1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/15/2006 | 0000 | 06/03/2006 | 0000 |
| Subject: | NIM/MWRP/M1 - IRT Sensor Calibration |
| DataStreams: | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
| Description: | Discrepancies between the MWRP and Skyrad IRT were observed in January. The MWRP IRT readings were constantly higher than those of the skyrad IRT. Some changes were introduced to the MWRP IRT to address the problem (see DQR D060602.2). On May 3, the IRT mirror was replaced. After the change in the mirror, the MWRP IRT readings became about 5-8 C lower. On June 3 the agreement between MWRP and Skyrad IRT became satisfactory (2-5 degree C difference). It is hard to numerically quantify the difference in the IRT readings caused by the change in the mirror. We can only warn the user that between January 1 and June 3 the MWRP readings are 8 to 15 degree higher than the skyrad IRT. |
| Measurements: | nimmwrpM1.00:
nimmwrpM1.b1:
nimmwrprawM1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/04/2006 | 1800 | 05/13/2006 | 0748 |
| Subject: | NIM/AOS/M1 - Mass flow controller failure |
| DataStreams: | nimaosccnM1.a1, nimaosM1.a1, nimaosauxM1.a1 |
| Description: | The mass flow controller stopped working. A replacement one was installed at the site. |
| Measurements: | nimaosccnM1.a1:
nimaosM1.a1:
nimaosauxM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/12/2006 | 0250 | 05/26/2006 | 1540 |
| Subject: | NIM/AOS/M1 - Nephelometer failure |
| DataStreams: | nimaosM1.a1 |
| Description: | There was was an electronic problem with one of the nephelometer circuit boards and the measurements of aerosol scattering coefficients were not recorded. |
| Measurements: | nimaosM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/26/2005 | 1530 | 01/07/2007 | 2359 |
| Subject: | NIM/ECOR/M1 - Flux Data Suspect for Some Wind Directions |
| DataStreams: | nim30ecorM1.b1 |
| Description: | NIM: For some wind directions the horizontal fetch was not representative of the field in which the AMF was located. Therefore, for the wind direction ranges 90-170 (buildings) and 220-280 (trees) degrees, the fluxes are affected by insufficient fetch and surfaces, buildings, or vegetation that are not similar to the local field conditions. |
| Measurements: | nim30ecorM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/15/2006 | 0000 | 04/21/2006 | 0000 |
| Subject: | NIM/MWRP/M1 - Reprocessed: IRT configuration setting error |
| DataStreams: | nimmwrpM1.b1 |
| Description: | The infrared thermometer settings (IRT) were not configured as specified by the manufacturer. The analog output was set to a range of -60 to +50 C (0-10V) instead of -50 to +50 C (0-10V). The settings were changed on April 20. The IR temperatures should be slightly smaller than reported. The data have been reprocessed to correct the IRT calibrations. Reprocessed data were archived in August 2006. |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/2006 | 0000 | 08/24/2006 | 2300 |
| Subject: | NIM/MWRP/M1 - Reprocessed - New retrieval coefficients |
| DataStreams: | nimmwrpM1.b1 |
| Description: | Occasionally, the retrieved relative humidity was exceeding 120%. Upon reviewing the data it was noticed that the high values were appearing in the highest layers (above 8 km) and especially during spring season. Since retrievals at the highest levels are mainly affected by the climatology used to constrain the retrievals, we reviewed the statistical coefficients that were used to retrieve temperature and humidity. It was discovered that, in the training dataset (radiosonde), there were a few outliers (invalid radiosonde soundings) that had escaped the screening process and were affecting the computations of the retrieval coefficients. We recomputed the retrieval coefficients with the newly screened set of radiosonde data and reprocessed all the previous data at Niamey. The reprocessed data were archived in August 2006. The new coefficients improve temperature and humidity profiles in two ways. The relative humidity will not exceed 120% in the upper layers and the temperature profiles will be in better agreement with the sonde in the first 4 km. |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/05/2006 | 0000 | 01/08/2007 | 0000 |
| Subject: | NIM/MWRP/M1 - 51.25 GHz channel calibration drifted |
| DataStreams: | nimmwrpM1.b1 |
| Description: | After a power outage on May 5 the 51.25 GHz had a slight change in the calibration. The resulting LWP computed by using all 6 channels increased of about 0.025 mm (25 g/m2). |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/01/2006 | 0000 | 08/31/2006 | 2359 |
| Subject: | NIM/MWRP/M1 - Sun in radiometer's field of view |
| DataStreams: | nimmwrpM1.b1 |
| Description: | Around noon local time every day there is a spike in the brightness temperature data. This is due to the sun being in the field of view of the radiometer. PWV and LWP are affected as a consequence |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/09/2006 | 0001 | 06/07/2006 | 1900 |
| Subject: | NIM/MWRP/M1 - IRTs do not agree with AERI |
| DataStreams: | nimmwrpM1.b1 |
| Description: | Since deployment at PYE, and then at NIM, the AMF SKYRAD IRT measured about 10K higher sky temperatures than the AERI and the MWRP IRT measured about 20K higher than the AERI. Several actions were taken to diagnose the problem including confirming the correct configuration of the IRTs and data logger, cleaning the mirror and lens, and replacing the mirror. After several days of rain beginning 6/2/2006, the three instruments came into agreement. The cause of the discrepancy was probably dust accumulation on the lens of the instrument |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/01/2006 | 0000 | 11/17/2006 | 1713 |
| Subject: | NIM/MWRP/M1 - Reprocessed: K-band calibration drift corrected |
| DataStreams: | nimmwrpM1.b1 |
| Description: | During October and November there was a drift in the K-Band calibration of the MWRP. This resulted in brightness temperatures that were too high. New calibration coefficients were derived from the median value of the noise diode temperature for the months of October and November and the data were reprocessed to apply the corrected calibrations. The reprocessed data were archived in January 2007. |
| Measurements: | nimmwrpM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/22/2006 | 1045 | 03/23/2006 | 1000 |
| Subject: | NIM/AOS/M1 - Bypass valve failure |
| DataStreams: | nimaosM1.a1, nimaosauxM1.a1, nimaosccnM1.a1 |
| Description: | The flow bypass valve failed which routed flow through the bypass line rather than through the instruments. The bypass line was capped the next day. The valve was replaced on 4/19. Data is considered unusable during the time between the valve failure on 3/22 and the capping of the flow line on 3/23. |
| Measurements: | nimaosccnM1.a1:
nimaosM1.a1:
nimaosauxM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/23/2006 | 1000 | 05/04/2006 | 1800 |
| Subject: | NIM/AOS/M1 - Impactor switch stuck in 10 micron mode |
| DataStreams: | nimaosM1.a1 |
| Description: | A wire came loose in the ball valve that switches between the two impactor size cuts. The impactor was stuck on the sub 10 micron size cut during this period of time. There was no data from the sub 1 micron size cut during this time. |
| Measurements: | nimaosM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/04/2006 | 1800 | 08/11/2006 | 1445 |
| Subject: | NIM/AOS/M1 - Flow controller failure |
| DataStreams: | nimaosM1.a1, nimaosauxM1.a1, nimaosccnM1.a1 |
| Description: | Following a power outage at the site both a PID controller for the main sample flow as well as a circuit board on the reference nephelometer were inoperable. The PID controller was replaced on 5/18 and the neph circuit board was replaced on 6/22. On a site visit in August the mentor found the PID had not been programmed correctly and was reading erroneous flows. The actual flow was at 50% of the recorded flow. Because the sample flow is diluted by 50% this makes most if not all of the sample flow from 5/18 to 8/11 from the diluter. |
| Measurements: | nimaosccnM1.a1:
nimaosM1.a1:
nimaosauxM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/04/2006 | 0155 | 09/07/2006 | 0950 |
| Subject: | NIM/AOS/M1 - CCN failure |
| DataStreams: | nimaosccnM1.a1 |
| Description: | The tech noticed that the CCN temperature wasn't stepping correctly and that there wasn't much signal. He was able to find and correct the problem by 9/7. |
| Measurements: | nimaosccnM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/17/2006 | 0836 | 11/22/2006 | 0025 |
| 05/13/2006 | 0749 | 05/18/2006 | 1044 |
| Subject: | NIM/AOS/M1 - Missing data |
| DataStreams: | nimaosccnM1.a1, nimaosM1.a1, nimaosauxM1.a1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | nimaosccnM1.a1:
nimaosM1.a1:
nimaosauxM1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/26/2005 | 1530 | 01/07/2007 | 2330 |
| Subject: | NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraft |
| DataStreams: | nim30ecorM1.b1 |
| Description: | Aircraft landings, departures, and running aircraft on the airport pad were found to produce large spikes in the half hourly CO2 flux and small spikes in CO2 concentration on many days during the entire deployment of the AMF at NIM. This influence was found on 40% of the days in March and April 2006 and sometimes for multiple periods in a day; this was typical of the year of data. The spikes range from only several micromoles s-1 m-2 to one hundred or more for flux (a typical spike was in the twenties) and near zero to 1.0 mmoles m-3 for CO2 concentration (typically around 0.15). The aircraft influence was caused by persistent easterly winds; the airport terminal pad and the nearest part of the runway were almost directly to the east of the ECOR location. Occasionally an influence on water vapor density was detected, but this was fairly rare and usually of very small magnitude. |
| Measurements: | nim30ecorM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/26/2005 | 0000 | 12/08/2006 | 2359 |
| Subject: | NIM/MET/M1/S1 - Reprocess: ORG Data has very small rainrate values |
| DataStreams: | nimmetS1.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: | nimmetS1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/26/2005 | 0000 | 12/08/2006 | 2359 |
| Subject: | NIM/MET/S1 - Wind Speed data contain offset due to induced voltage |
| DataStreams: | nimmetS1.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: | nimmetS1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/23/2005 | 0000 | 01/07/2007 | 2359 |
| Subject: | NIM/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
| DataStreams: | nimvceil25kM1.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: | nimvceil25kM1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/21/2005 | 0000 | 12/31/2006 | 0000 |
| Subject: | NIM/AOS/M1 - Data processing problem |
| DataStreams: | nimnoaaaosM1.b1, nimnoaaaosavgM1.b1, nimaosM1.a1 |
| 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: | nimnoaaaosavgM1.b1:
nimaosM1.a1:
nimnoaaaosM1.b1:
|