DQR ID | Subject | Data Streams Affected |
---|---|---|
D070412.1 | FKB/MET/M1 - Optical Rain Gauge Data Incorrect | fkbmetM1.b1 |
D070412.2 | FKB/MET/M1 - ORG Data incorrect during calibration | fkbmetM1.b1 |
D070417.1 | FKB/MET/M1 - Incorrect ORG data | fkbmetM1.b1 |
D070628.1 | FKB/MWRP/M1 - Reprocess: Incorrect calibration | fkbmwrpM1.b1 |
D071009.1 | FKB/MWRP/M1 - LN2 Calibration- | fkbmwrpM1.b1 |
D071016.1 | FKB/MWRP/M1 - Reprocessed: Updated 30-GHz calibration coefficient | fkbmwrpM1.b1 |
D071207.1 | FKB/MWRP/M1 - Heavy rain and fog at the site | fkbmwrpM1.b1 |
D080116.1 | FKB/MWRP/M1 - Possible slight drift of V-band calibration | fkbmwrpM1.b1 |
D080116.2 | FKB/MWRP/M1 - Periodic decrease in the 30-GHz brightness temperature | fkbmwrpM1.b1 |
D080116.25 | FKB/MET/M1 - ORG reporting precip constantly | fkbmetM1.b1 |
D081022.9 | FKB/MET/M1 - Wind Speed data contain offset due to induced voltage | fkbmetM1.b1 |
D100216.4 | FKB/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | fkbvceil25kM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/17/2007 | 0000 | 03/17/2007 | 0600 |
04/02/2007 | 0000 | 04/02/2007 | 0800 |
04/03/2007 | 0300 | 04/03/2007 | 0800 |
04/04/2007 | 2300 | 04/05/2007 | 0900 |
04/06/2007 | 0100 | 04/06/2007 | 0800 |
04/07/2007 | 0000 | 04/07/2007 | 0700 |
04/09/2007 | 0000 | 04/09/2007 | 0800 |
04/10/2007 | 0000 | 04/10/2007 | 0700 |
04/11/2007 | 0000 | 04/11/2007 | 0700 |
Subject: | FKB/MET/M1 - Optical Rain Gauge Data Incorrect |
DataStreams: | fkbmetM1.b1 |
Description: | The optical rain gauge (ORG) data was incorrect during the listed times. Ice/frost was forming on the lenses causing the ORG to believe there was precipitation occurring. |
Measurements: | fkbmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/08/2007 | 0736 | 04/08/2007 | 0745 |
Subject: | FKB/MET/M1 - ORG Data incorrect during calibration |
DataStreams: | fkbmetM1.b1 |
Description: | The ORG data was incorrect during calibration checks. The check mimics a precipitation event so the precip amounts that were collected were not actually measured. |
Measurements: | fkbmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2007 | 0000 | 04/28/2007 | 2359 |
Subject: | FKB/MET/M1 - Incorrect ORG data |
DataStreams: | fkbmetM1.b1 |
Description: | Precipitation was being reported on days with no rain. Problems with the grounding and the orientation of the receiver facing south (sunlight in the optics) caused erroneous readings. |
Measurements: | fkbmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/20/2007 | 0520 | 06/21/2007 | 2000 |
Subject: | FKB/MWRP/M1 - Reprocess: Incorrect calibration |
DataStreams: | fkbmwrpM1.b1 |
Description: | The software was started with the wrong calibration data. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2007 | 1100 | 09/17/2007 | 1500 |
Subject: | FKB/MWRP/M1 - LN2 Calibration- |
DataStreams: | fkbmwrpM1.b1 |
Description: | Between 1100 and 1500 there were two calibration attempts. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2007 | 1500 | 10/09/2007 | 1840 |
Subject: | FKB/MWRP/M1 - Reprocessed: Updated 30-GHz calibration coefficient |
DataStreams: | fkbmwrpM1.b1 |
Description: | On 9/17 the instrument was calibrated with liquid nitrogen. For the 30-GHz channel the results of calibration were not optimal and were causing a negative bias in the retrieved LWP. On 10/9 the 30-GHz calibration parameters were updated with values derived from tip curves. Data between 9/17 and 10/9 were reprocessed to correct the 30-GHz calibration. Reprocessed data were archived 20080122. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2007 | 0000 | 12/15/2007 | 0000 |
Subject: | FKB/MWRP/M1 - Heavy rain and fog at the site |
DataStreams: | fkbmwrpM1.b1 |
Description: | The months of November and December have been very rainy and wet at the AMF site. During rain events the radiometer does not work properly because of water accumulating on the window. In addition condensation and fog will affect the data causing very high brightness temperatures. Although the instrument is equipped with rain detection system to flag bad data, it is important that the user pays extra attention to the quality of the data during periods of continuous rain, drizzle or fog by applying the quality checks and screening for high brightness temperatures. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2007 | 0000 | 12/31/2007 | 2300 |
Subject: | FKB/MWRP/M1 - Possible slight drift of V-band calibration |
DataStreams: | fkbmwrpM1.b1 |
Description: | During the month of November and December the bias between model computations and measurements for the 51.25 and 52.28 GHz channels has slightly increased to about 3 K. This might be due to a slight drift in the calibration of these channels. The calibration error associated with these data is increased, to 2-3 K, for these two months. See this plot for a comparison of measurements (solid lines) and model (red dots) for the 51.25 (black), 52.28 (blue) and 53.85-GHz (green) channels. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/19/2007 | 0000 | 12/31/2007 | 0000 |
Subject: | FKB/MWRP/M1 - Periodic decrease in the 30-GHz brightness temperature |
DataStreams: | fkbmwrpM1.b1 |
Description: | Starting around 12/19 until the end of December, the 30-GHz brightness temperature started to show a periodic oscillation between 9 and 11 AM GMT. The cause of this is probably thermal instability of the radiometer since it does correspond with some larger oscillations of the mixer temperature. During this time external temperatures displayed large variations going from -10 C at night to about +5 C during the day. The corresponding liquid water path retrievals are affected showing periodic negative values. Liquid water path retrievals between 12/19 and 12/31 are the most affected variable since they are largely affected by the 30-GHz channel. A time series plot of the data will clearly show the periodic fluctuation of the LWP variable. |
Measurements: | fkbmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/15/2007 | 0300 | 12/31/2007 | 2359 |
Subject: | FKB/MET/M1 - ORG reporting precip constantly |
DataStreams: | fkbmetM1.b1 |
Description: | During the time period listed the ORG reported precip consistently. Reason unknown as deployment ended before resolution of problem. |
Measurements: | fkbmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2007 | 0000 | 01/01/2008 | 2359 |
Subject: | FKB/MET/M1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | fkbmetM1.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: | fkbmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2007 | 0000 | 01/01/2008 | 2359 |
Subject: | FKB/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | fkbvceil25kM1.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: | fkbvceil25kM1.b1:
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