DQR ID | Subject | Data Streams Affected |
---|---|---|
D030712.25 | SGP/VCEIL/B1 - recurrent frequent data gaps | sgpvceil25kB1.00, sgpvceil25kB1.a1, sgpvceil25kB1.b1 |
D040502.1 | SGP/VCEIL/B4 - Receiver failure | sgpvceil25kB4.00, sgpvceil25kB4.a1, sgpvceil25kB4.b1 |
D050721.2 | SGP/VCEIL/B4 - Detection optics degrading | sgpvceil25kB4.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2003 | 0828 | 07/15/2003 | 1949 |
Subject: | SGP/VCEIL/B1 - recurrent frequent data gaps |
DataStreams: | sgpvceil25kB1.00, sgpvceil25kB1.a1, sgpvceil25kB1.b1 |
Description: | Beginning on 07/06/2003, frequent short-term data gaps began occurring. The situation continued to worsen until the PC locked up entirely on 07/14/2003. After the computer was re-booted, the data gaps stopped and have not returned. The problem appears to be restricted entirely to the computer and does not involve the ceilometer itself. Thus, there appears to be no problem with the data records that were properly collected. |
Measurements: | sgpvceil25kB1.b1:
sgpvceil25kB1.a1:
sgpvceil25kB1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/2002 | 0000 | 01/10/2003 | 2359 |
Subject: | SGP/VCEIL/B4 - Receiver failure |
DataStreams: | sgpvceil25kB4.00, sgpvceil25kB4.a1, sgpvceil25kB4.b1 |
Description: | The receiver failed abruptly just a few minutes after 00:00 UTC on Dec. 12, 2002. The problem was resolved by replacement of the broken ceilometer with a working ceilometer on Jan. 10, three days after the problem was PIFed. |
Measurements: | sgpvceil25kB4.00:
sgpvceil25kB4.a1:
sgpvceil25kB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2003 | 1725 | 05/10/2004 | 1815 |
Subject: | SGP/VCEIL/B4 - Detection optics degrading |
DataStreams: | sgpvceil25kB4.b1 |
Description: | Backscatter plots exhibited horizontal striping due to electronic ringing of either the detector or the associated amplification electronics. The instrument was changed out on May 10. The ceilometer continued to correctly detected clouds during this period, though users should be aware of the degraded performance. |
Measurements: | sgpvceil25kB4.b1:
|