DQR ID | Subject | Data Streams Affected |
---|---|---|
D060113.1 | TWP/VCEIL/C3 - low receiver sensitivity | twpvceil25kC3.b1 |
D060224.3 | TWP/MPL/C3 - Temporary laser failure | twpmplC3.00, twpmplC3.a1 |
D060227.1 | TWP/MPL/C3 - Backscatter profiles are inaccurate due to computer HD corruption. | twpmplC3.00, twpmplC3.a1 |
D060426.8 | TWP/SMET/C3 - ORG data noisy due to degraded ground | twpsmet60sC3.b1 |
D060629.1 | TWP/MMCR/C3 - Reprocess: Reflectivity Calibration Problems | twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
D060818.3 | TWP/SMET/C3 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC3.b1 |
D061011.4 | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC3.b1 |
D070112.3 | TWP/MMCR/C3 - Reprocess: Height Error | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2005 | 0555 | 05/18/2006 | 2300 |
Subject: | TWP/VCEIL/C3 - low receiver sensitivity |
DataStreams: | twpvceil25kC3.b1 |
Description: | The ceilometer reported frequent receiver alarms. There are periods when the receiver sensitivity dropped to about 50%. The problem was corrected by replacing the instrument with a spare. |
Measurements: | twpvceil25kC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2006 | 0600 | 02/23/2006 | 0600 |
Subject: | TWP/MPL/C3 - Temporary laser failure |
DataStreams: | twpmplC3.00, twpmplC3.a1 |
Description: | No backscatter information is in the data. The backscatter data in the files during this time is solar background information only. The laser turned it's self off, reason: unknown. A power cycle of the entire system corrected the problem. |
Measurements: | twpmplC3.00:
twpmplC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/24/2006 | 0600 | 02/27/2006 | 0700 |
Subject: | TWP/MPL/C3 - Backscatter profiles are inaccurate due to computer HD corruption. |
DataStreams: | twpmplC3.00, twpmplC3.a1 |
Description: | The data shows a consistent cloud deck at 7.5km with what appears to be a duplication of the data from ground zero. The temperature and energy monitor values are also affected. The computer was found with multiple corruption problems. These corruptions may have cause the ghost data at 7.5km. A chkdsk was performed which appears to have corrected the problem. |
Measurements: | twpmplC3.00:
twpmplC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2005 | 0000 | 08/24/2006 | 2359 |
Subject: | TWP/SMET/C3 - ORG data noisy due to degraded ground |
DataStreams: | twpsmet60sC3.b1 |
Description: | SMET Rain Data began to be noisy during December 2005 and the problem slowly became worse over time so that in February 2006 the ORG was reporting with a constant background value of around 0.10 mm/hr rain rate. ORG voltage showed a near constant value above the 85mV threshold. The ground for the ORG had become degraded and was lost due to corrosion. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/2005 | 0000 | 07/18/2006 | 2359 |
Subject: | TWP/MMCR/C3 - Reprocess: Reflectivity Calibration Problems |
DataStreams: | twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
Description: | There was a problem with the reflectivity values being shifted 15-20 dBz less than what one might expect them to be. The low noise amplifier (LNA) was damaged by lightning. The LNA was replaced 20060718. |
Measurements: | twpmmcrspecmomC3.a0:
twpmmcrmomC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/2003 | 0000 | 07/13/2006 | 2219 |
Subject: | TWP/SMET/C3 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC3.b1 |
Description: | Barometric pressure data was converted from hPa to kPa in order to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2002 | 0000 | 09/26/2006 | 1435 |
Subject: | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC3.b1 |
Description: | A tipping bucket rain gauge was added to the SMET suite of instruments effective 20060926. Two new variables (count and rain amount) were added at the end of the twpsmet60sC1.b1 datastream. When reprocessing of this datastream occurs these variables will be added with -9999 (missing) as the value for dates prior to gauge installation. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/04/2005 | 0500 | 01/10/2007 | 2000 |
Subject: | TWP/MMCR/C3 - Reprocess: Height Error |
DataStreams: | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
Description: | A timing error was found in the PIRAQ MMCR's. It resulted in recorded heights being too high for each radar mode by the following amounts: Mode 1: 24.8756 m too high Mode 2: 25.6249 m too high Mode 3: 33.1176 m too high Mode 4: 33.1176 m too high Range gate spacing was not affected. |
Measurements: | twpmmcrspecmomC3.a0:
twpmmcrmomC3.00:
twpmmcrmomC3.b1:
|