| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D010831.3 | SGP/MFR10M/C1 - Head temperature problems | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D030916.7 | SGP/MFR10M/C1 - Artifact in data | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D050218.3 | SGP/MFR10M/C1 - Data discontinuities of unknown origin | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D050218.4 | SGP/MFR10M/C1 - Dip in data at solar noon | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| D060411.7 | SGP/MFR10M/C1 - Missing data | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/11/2001 | 0000 | 09/30/2001 | 2359 |
| Subject: | SGP/MFR10M/C1 - Head temperature problems |
| DataStreams: | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | Head temperature control was not functioning during the specified period. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/14/2003 | 0000 | 09/16/2003 | 2359 |
| Subject: | SGP/MFR10M/C1 - Artifact in data |
| DataStreams: | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | A cable was hanging under the instrument and was in the field of view of the instrument. This resulted in some erroneous increases in the data, frequently around 22GMT. These increases are likely from specular reflections off the cable. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
sgpmfr10mC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/27/2003 | 1430 | 06/27/2003 | 1530 |
| 01/20/2005 | 1900 | 01/20/2005 | 2000 |
| Subject: | SGP/MFR10M/C1 - Data discontinuities of unknown origin |
| DataStreams: | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | There is a discontinuity in the data (all channels) just before 1930 UTC on Jan 20, 2005 and just after 1500 UTC on June 27, 2003. There is nothing unusual in the temp or volt data. At these times the tower was lowered for cleaning so the initial assumption was the instrument was dirty, and a cleaning resulted in the discontinuity. This theory doesn't hold up well though as the tower is lowered for instrument cleaning regularly and these are the only two times in the past few years that a discontinuity coinciding with a lowering of the tower has resulted . Down pointing instruments are also not prone to collecting dust and dirt. This instrument is located on the E13 SIRS tower and the down pointing PSP does not show a discontinuity at either time, which further discounts the dirty instrument theory. Site operations were asked to check the instrument mount to see if it was loose possibly causing the instrument to change its position, and they reported that the mount seemed secure and stable. So as of now, this issue is a mystery. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
sgpmfr10mC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/01/2004 | 0000 | 04/30/2005 | 0000 |
| Subject: | SGP/MFR10M/C1 - Dip in data at solar noon |
| DataStreams: | sgpmfr10mC1.00, sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | On clear days there is a dip in the data (all channels) at solar noon that is more pronounced during the winter months. While we currently don't know the cause of this dip, we believe it is related to reflections off the tower pole. The working theory says at solar noon the north-south crossbar shades the tower pole cutting off reflections into the detector. If true, this means data on either side of the dip are being enhanced by reflections and the data within the dip are actually "correct." An experiment is being planned for next fall that will wrap the upper portion of the tower in a non-reflecting cloth. This should determine if the dip is related to reflections from the tower pole. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
sgpmfr10mC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/16/1994 | 0230 | 07/19/1994 | 1831 |
| 08/25/1994 | 2030 | 09/11/1994 | 1631 |
| 12/20/1994 | 2230 | 12/29/1994 | 1248 |
| 05/23/1995 | 1630 | 05/26/1995 | 1327 |
| 07/17/1995 | 0830 | 01/07/1996 | 0533 |
| 01/19/1996 | 1530 | 03/01/1996 | 1731 |
| 04/02/1997 | 1730 | 04/04/1997 | 0019 |
| 05/23/1997 | 1408 | 05/27/1997 | 0104 |
| 05/30/1997 | 1408 | 06/02/1997 | 0314 |
| 10/31/1998 | 1113 | 11/03/1998 | 1935 |
| 12/25/1998 | 2013 | 12/28/1998 | 2014 |
| 03/14/1999 | 0022 | 03/16/1999 | 0135 |
| 04/14/1999 | 2013 | 05/04/1999 | 1914 |
| 06/12/1999 | 0616 | 06/14/1999 | 1414 |
| 07/15/1999 | 1813 | 07/19/1999 | 1813 |
| 11/24/2000 | 1513 | 11/27/2000 | 1814 |
| 12/11/2000 | 1313 | 12/13/2000 | 2115 |
| 08/18/2001 | 0002 | 08/20/2001 | 1602 |
| 01/30/2002 | 1802 | 02/11/2002 | 1502 |
| 03/09/2002 | 2002 | 03/12/2002 | 0702 |
| 11/14/2002 | 2002 | 11/18/2002 | 1602 |
| 07/23/2004 | 2102 | 07/26/2004 | 1458 |
| Subject: | SGP/MFR10M/C1 - Missing data |
| DataStreams: | sgpmfr10mC1.a0, sgpmfr10mC1.b1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | sgpmfr10mC1.b1:
sgpmfr10mC1.a0:
|