DQR ID | Subject | Data Streams Affected |
---|---|---|
D090507.2 | GRW/VCEIL/M1 - Receiver failure | grwvceil25kM1.b1 |
D090629.1 | GRW/SONDE/M1 - Wind data missing | grwsondewnpnM1.b1 |
D091019.2 | GRW/MET/M1 - Temperature/RH Aspirator Failure | grwmetM1.b1 |
D100216.6 | GRW/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | grwvceil25kM1.b1 |
D100722.5 | GRW/MET/M1 - Reprocess: ORG Data has very small rainrate values | grwmetM1.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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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:
|