DQR ID | Subject | Data Streams Affected |
---|---|---|
D020227.8 | SGP/MPL/C1 - Data missing due to hardware failures | sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1 |
D040424.1 | SGP/MPL/C1 - Signal degrading | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040426.4 | SGP/MPL/C1 - Detector Failure | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040525.28 | SGP/MPL/C1 - Metadata errors | sgpmplC1.a1, sgpmplnor1campC1.c1 |
D040706.4 | SGP/MPL/C1 - Reduced detection sensitivity | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D050421.14 | SGP/MPL/C1 - Sensor Calibration | sgpmplC1.00, sgpmplC1.a1 |
D050914.3 | SGP/MPL/C1 - Instrument offline | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D970408.3 | Continuing signal degradation | sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1 |
D990224.1 | SGP/MPL - Missing data due to blown detector | sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/10/2001 | 0000 | 10/29/2001 | 2033 |
Subject: | SGP/MPL/C1 - Data missing due to hardware failures |
DataStreams: | sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1 |
Description: | The MPL instrument was out of service during the time range specified due to hardware failures. Data during this period are missing and unrecoverable. |
Measurements: | sgpmplC1.a0:
sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplC1.00:
sgpmplcbh1scottC1.c0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/2002 | 0000 | 01/16/2003 | 2359 |
Subject: | SGP/MPL/C1 - Signal degrading |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The MPL viewport window was blown off during a storm on 2002/09/25. The MPL received a soaking of rain. Following this event, although site operations cleaned and dried the optics, the lidar performance continued to degrade over the next few months. Although initially suitable for cloud detection, by Dec 10th the lidar was providing useful results only during the day (oddly enough). By Jan 16, the detector was dead. It is not recommended to depend on night-time cloud base heights after Dec. 10 2002. It is not recommended to use any of the data after 9/25 for aerosol retrievals. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/2003 | 0000 | 01/31/2003 | 2359 |
Subject: | SGP/MPL/C1 - Detector Failure |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The detector failed following a period of data quality degradation. The MPL was replaced on 1/31/2003. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1996 | 0000 | 01/19/2000 | 2359 |
Subject: | SGP/MPL/C1 - Metadata errors |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1 |
Description: | The latitude, longitude and altitude of the Micropulse Lidar (MPL) were incorrectly entered into the ARM database. The correct location of the SGP.C1 MPL is: Lat: 36.606N Lon: 97.485W Alt: 316m |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 1500 | 07/07/2004 | 0350 |
07/23/2004 | 2200 | 09/10/2004 | 2100 |
Subject: | SGP/MPL/C1 - Reduced detection sensitivity |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | During the time periods indicated, the laser power supply was low. This resulted in compromised detection sensitivity, particularly for thin clouds and/or during daylight hours. That is, some clouds may not have been identified. The low laser power would not have resulted in false positives. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/2004 | 0000 | 02/23/2005 | 2300 |
Subject: | SGP/MPL/C1 - Sensor Calibration |
DataStreams: | sgpmplC1.00, sgpmplC1.a1 |
Description: | The Energy Monitor records the value of the laser energy. During the time in question, the laser energy exceed the maximum value in the calibration table for the energy monitor. In other words, the value is pegged. This condition does not affect the backscatter signal. But it will prevent users from normalizing the backscatter signal to the laser output. |
Measurements: | sgpmplC1.a1:
sgpmplC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0350 | 07/23/2004 | 2150 |
Subject: | SGP/MPL/C1 - Instrument offline |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | Instrument was taken offline due to a failure of the laser power supply. Data are missing and unrecoverable. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/17/1997 | 0000 | 04/14/1997 | 2359 |
Subject: | Continuing signal degradation |
DataStreams: | sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1 |
Description: | Despite recent efforts (970310-970314) by the instrument mentor, signal degradation of the MPL has continued. The degradation has continued to the point that the effective range of the MPL is nearing 10 km. The instrument mentor and PI have concluded that an overhaul of the instrument by the vendor is in order. |
Measurements: | sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
DsgpmplC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/1998 | 0000 | 01/23/1999 | 2359 |
Subject: | SGP/MPL - Missing data due to blown detector |
DataStreams: | sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1 |
Description: | Sometime early 11/11 the detector on the MPL-004 blew out. The Detector was replaced by Albert Mendoza. The instrument was operational on Jan. 23, 1999. Link this to P981119.2 that reported the blown detector and the corrective action taken |
Measurements: | sgpmplcbh1scottC1.c1:
sgpmplC1.a1:
sgpmplnor1campC1.c1:
DsgpmplhrC1.00:
|