DQR ID | Subject | Data Streams Affected |
---|---|---|
D090507.2 | GRW/VCEIL/M1 - Receiver failure | grwvceil25kM1.b1 |
D090508.1 | GRW/ECOR/M1 - Reprocessed: ECOR Wind direction offset corrected | grw30ecorM1.b1 |
D090604.1 | GRW/TSI/M1 - Mirror reflection | grwtsiskycoverM1.b1 |
D090629.1 | GRW/SONDE/M1 - Wind data missing | grwsondewnpnM1.b1 |
D091019.2 | GRW/MET/M1 - Temperature/RH Aspirator Failure | grwmetM1.b1 |
D100209.3 | GRW/TSI/M1 - Shadowband Misalignment | grwtsicldmaskM1.a1, grwtsiskycoverM1.b1, grwtsiskyimageM1.a1 |
D100216.6 | GRW/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | grwvceil25kM1.b1 |
D100511.1 | GRW/TSI/M1 - Contamination of mirror | grwtsimovieM1.a1, grwtsicldmaskM1.a1, grwtsiskycoverM1.b1, grwtsiskyimageM1.a1 |
D100722.5 | GRW/MET/M1 - Reprocess: ORG Data has very small rainrate values | grwmetM1.b1 |
D110118.2 | GRW/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration by Aircraft | grw30ecorM1.b1 |
D110505.1 | GRW/TSI/M1 - Shadowband Misalignment | grwtsiskycoverM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/22/2009 | 0925 | 05/16/2009 | 1010 |
Subject: | GRW/VCEIL/M1 - Receiver failure |
DataStreams: | grwvceil25kM1.b1 |
Description: | The AMF VCEIL had lower-than-normal laser transmitter power, ~84%, so the instrument was replaced with a spare on 4/22. The spare VCEIL had just been repaired but began to display receiver failure warnings. Diagnostic information was sent to Vaisala and we discussed either replacing the receiver with the one from the original VCEIL (with the degraded transmitter) or replacing the transmitter in the original VCEIL with the one from the spare. Vaisala recommended the latter because the original VCEIL is a much newer unit. On 5/16, the site operator replaced the transmitter in the original VCEIL with the one from the spare, realigned the optics, recalibrated the laser, and put the instrument back into service, successfully correcting the problem. The data during this period were intermittently incorrect, containing warning flags and alarms and unreasonable cloud base heights. |
Measurements: | grwvceil25kM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2009 | 1530 | 05/08/2009 | 1830 |
Subject: | GRW/ECOR/M1 - Reprocessed: ECOR Wind direction offset corrected |
DataStreams: | grw30ecorM1.b1 |
Description: | The ECOR sonic anemometer was initially aligned to an east declination instead of a west declination. For the period stated, ECOR wind direction was 21 degrees too high. Data were reprocessed 20090602 and archived 20090619. |
Measurements: | grw30ecorM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/2009 | 1500 | 06/19/2009 | 1540 |
Subject: | GRW/TSI/M1 - Mirror reflection |
DataStreams: | grwtsiskycoverM1.b1 |
Description: | A deformity in the mirror produced an anomolous refraction within the mirror surface that appeared in the images as a white streak near the top of the mirror and shadowband. The mirror was replaced on 6/19. |
Measurements: | grwtsiskycoverM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/21/2009 | 0500 | 06/24/2009 | 1100 |
Subject: | GRW/SONDE/M1 - Wind data missing |
DataStreams: | grwsondewnpnM1.b1 |
Description: | A GPS problem associated with Vaisala BBSS ground station software issues caused the ground stations to enter into an error state when using GPS wind finding. In some instances, the flight was aborted due to the error state and no data was collected. A workaround was developed to allow sondes to be launched without collecting wind data. |
Measurements: | grwsondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2009 | 0000 | 10/16/2009 | 0915 |
Subject: | GRW/MET/M1 - Temperature/RH Aspirator Failure |
DataStreams: | grwmetM1.b1 |
Description: | The aspirator fan on the solar shield failed causing incorrect readings on the temp, RH and calculated variables. |
Measurements: | grwmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2010 | 1142 | 02/02/2010 | 1125 |
Subject: | GRW/TSI/M1 - Shadowband Misalignment |
DataStreams: | grwtsicldmaskM1.a1, grwtsiskycoverM1.b1, grwtsiskyimageM1.a1 |
Description: | The shadowband was intermittently misaligned and not completely masking the sun because the mirror became loose from the shaft while being polished. The shadowband was realigned on 1/14 but by 1/27 was again slightly misaligned. The instrument was reoriented with true north on 1/27 and the shadowband adjusted again on 1/31. The problem was corrected on 2/2 when the mirror mounting was tightened and the shadowband realigned. |
Measurements: | grwtsicldmaskM1.a1:
grwtsiskycoverM1.b1:
grwtsiskyimageM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/13/2009 | 0000 | 10/31/2009 | 2359 |
Subject: | GRW/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | grwvceil25kM1.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: | grwvceil25kM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/2010 | 1843 | 02/12/2010 | 1604 |
Subject: | GRW/TSI/M1 - Contamination of mirror |
DataStreams: | grwtsimovieM1.a1, grwtsicldmaskM1.a1, grwtsiskycoverM1.b1, grwtsiskyimageM1.a1 |
Description: | A persistent, agile bird was landing on top of and polluting the mirror, multiple times throughout the day, affecting the visible and processed images and cloud fraction data. |
Measurements: | grwtsimovieM1.a1:
grwtsicldmaskM1.a1:
grwtsiskycoverM1.b1:
grwtsiskyimageM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/2009 | 0000 | 06/30/2010 | 2359 |
Subject: | GRW/MET/M1 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | grwmetM1.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 will reprocess the data to remove these small values. |
Measurements: | grwmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2009 | 1530 | 10/11/2010 | 0800 |
Subject: | GRW/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration by Aircraft |
DataStreams: | grw30ecorM1.b1 |
Description: | Aircraft landings, departures, and running aircraft on the airport pad were found to produce spikes in the half hourly CO2 flux and small spikes in CO2 concentration on many days during the entire deployment of the AMF1 at GRW. This influence sometimes occurred 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). Occasionally an influence on water vapor density was detected, but this was fairly rare and usually of very small magnitude. |
Measurements: | grw30ecorM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2010 | 1343 | 05/25/2010 | 0849 |
Subject: | GRW/TSI/M1 - Shadowband Misalignment |
DataStreams: | grwtsiskycoverM1.b1 |
Description: | The shadowband was slightly out of alignment because one corner of the instrument stand had sunk about 25mm. The stand was releveled and the TSI re-aligned. |
Measurements: | grwtsiskycoverM1.b1:
|