DQR ID | Subject | Data Streams Affected |
---|---|---|
D030117.21 | SGP/VCEIL/B5 - REPROCESS: CBH reported in feet but labeled meters | sgpvceil25kB5.a1, sgpvceil25kB5.b1 |
D050406.2 | SGP/VCEIL/B5 - Noisy Backscatter | sgpvceil25kB5.b1 |
D051005.3 | SGP/VCEIL/B5 - Backscatter noise affects cloud detection | sgpvceil25kB5.b1 |
D071101.2 | SGP/VCEIL/B5 - Degraded hardware | sgpvceil25kB5.b1 |
D080924.4 | SGP/VCEIL/B5 - Missing data | sgpvceil25kB5.b1 |
D100215.1 | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/27/2001 | 0000 | 12/13/2001 | 0013 |
Subject: | SGP/VCEIL/B5 - REPROCESS: CBH reported in feet but labeled meters |
DataStreams: | sgpvceil25kB5.a1, sgpvceil25kB5.b1 |
Description: | The cloud base heights reported in the file are in feet despite being labelled meters. Reprocessing of this data is highly recommended. The first affected file is from 2001-05-27 when the ceilometer was exchanged with a repaired one. The last affected file is on 2001-12-13 when the new vceil_ingest version 7.2 was released which applies the proper units conversion from feet to meters. |
Measurements: | sgpvceil25kB5.a1:
sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/19/2004 | 1330 | 04/13/2005 | 2359 |
Subject: | SGP/VCEIL/B5 - Noisy Backscatter |
DataStreams: | sgpvceil25kB5.b1 |
Description: | Since October of 2004, the noise in the backscatter plots occasionally become high in amplitude for periods of time lasting anywhere from an hour or so to as much as a day. This problem appears similar to a dirty window (such as the problem at B6 last week), but the fact that the plots show high amplitude for short durations of time imply that this problem is different. Cloud base height detection appears to be unaffected. |
Measurements: | sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/2005 | 0000 | 07/14/2005 | 2359 |
Subject: | SGP/VCEIL/B5 - Backscatter noise affects cloud detection |
DataStreams: | sgpvceil25kB5.b1 |
Description: | Performance of the instrument degraded resulting in very noisy backscatter data to the extent that cloud detection was severely impacted beyond approximately 3 km (day and night). |
Measurements: | sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/25/2007 | 0630 | 11/08/2007 | 1729 |
Subject: | SGP/VCEIL/B5 - Degraded hardware |
DataStreams: | sgpvceil25kB5.b1 |
Description: | Following repair at Vaisala and re-installation on 10/23/2007, the ceilometer experiencing intermittent receiver alarms and discontinuities in the backscatter plot. Vaisala recommended the old firmware card be replaced but that did not resolve the problems. The instrument was replaced with a spare and returned to the vendor for repair. |
Measurements: | sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/08/2002 | 1859 | 03/11/2002 | 2013 |
09/23/2008 | 2033 | 09/25/2008 | 1945 |
Subject: | SGP/VCEIL/B5 - Missing data |
DataStreams: | sgpvceil25kB5.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpvceil25kB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 10/31/2009 | 2359 |
Subject: | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.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. This DQR also applies to a1 level data collected prior to b1 level. |
Measurements: | sgpvceil25kC1.b1:
sgpvceil25kB4.b1:
sgpvceil25kB6.b1:
sgpvceil25kB5.b1:
|