DQRs for Session: 153689 User:bsyin1Completed: 10-09-2013

Data Quality Reports for Session: 153689 User: bsyin1 Completed: 10/09/2013

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D010831.3	SGP/MFR10M/C1 - Head temperature problems	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D020620.42	SGP/MFR25M/C1 - Loose connections	sgpmfr25mC1.a0, sgpmfr25mC1.b1
D030916.7	SGP/MFR10M/C1 - Artifact in data	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D050218.3	SGP/MFR10M/C1 - Data discontinuities	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D050218.4	SGP/MFR10M/C1 - Dip in data at solar noon	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D060411.7	SGP/MFR10M/C1 - Missing data	sgpmfr10mC1.b1, sgpmfr10mC1.a0
D090226.8	SGP/MFR25M/C1 - Missing data	sgpmfr25mC1.a0, sgpmfr25mC1.b1
D090520.3	SGP/MFR10M/C1 - Heater failure	sgpmfr10mC1.b1, sgpmfr10mC1.a0
D091112.3	SGP/MFR10M/C1 - Bad connection	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D100722.1	SGP/MFR10M/C1 - Poor connection	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D120229.2	SGP/MFR10M/C1 - Noise in ch415, sensor degradation	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D120229.3	SGP/MFR10M/C1 - Channel 615 dead	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D120229.4	SGP/MFR10M/C1 - Broadband channel failure	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D941227.4	SGP/MFR10M/C1 - Tower lowered for maintenance	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D950327.1	SGP/MFR10M/C1 - New datalogger PROM	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D960914.17	SGP/MFR10m/C1 - Small intermittent time stamp error	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D960914.18	SGP/MFR25M/C1 - Intermittent small time stamp error	sgpmfr25mC1.a0, sgpmfr25mC1.b1
D961008.1	SGP/MFR10M/C1 - Corrupt or truncated data	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D961010.1	SGP/MFR25M/C1 - poor data quality	sgpmfr25mC1.a0, sgpmfr25mC1.b1
D990906.1	SGP/MFR10M/C1 - Head heater not working	sgpmfr10mC1.a0, sgpmfr10mC1.b1

DQRID : D010831.3

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: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) callang_flags cosine_solar_zenith_angle 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: callang_flags head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D020620.42

Start Date	Start Time	End Date	End Time
03/24/2002	0908	04/11/2002	2202

Subject:	SGP/MFR25M/C1 - Loose connections
DataStreams:	sgpmfr25mC1.a0, sgpmfr25mC1.b1
Description:	No solar data after 03/24/2002 and no head temp data after 03/25/2002. Connections were reseated on 04/02/2002, but the data still looked bad. More maintenance occurred on 04/11/2002, when a reseating and tightening of the connections was performed.
Measurements:	sgpmfr25mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) lon logger_volt cosine_solar_zenith_angle time_offset base_time lat 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) alt callang_flags head_temp sgpmfr25mC1.a0: alt base_time head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) lat 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) callang_flags logger_volt time_offset lon

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DQRID : D030916.7

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.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: logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) base_time cosine_solar_zenith_angle 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) time_offset 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) alt callang_flags lon head_temp lat sgpmfr10mC1.a0: callang_flags time_offset 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) lon base_time head_temp 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) lat alt

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DQRID : D050218.3

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
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	There is a discontinuity in the data (all channels) just after 1500 UTC on June 27, 2003 and again, just before 1930 UTC on Jan 20, 2005. 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. Also, 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, the cause of this issue is a mystery. Compare with other down pointing instruments to help ascertain if data on one side of the discontinuity or the other are "better." Perform an error analysis to determine if this would introduce a significant error in the role the data stream plays in a user's research.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D050218.4

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.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. Since at this point we don't know if the dip consists of bad or good data, users should be aware there is a problem and treat all the data as suspect. It should noted that the magnitude of the problem is relatively small, likely no greater than 2.5%, so the dataset as whole is probably still useful as is for most users.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D060411.7

Start Date	Start Time	End Date	End Time
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
07/16/1994	0230	07/19/1994	1831
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
07/23/2004	2102	07/26/2004	1458
06/12/2011	0500	06/14/2011	1959
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
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

Subject:	SGP/MFR10M/C1 - Missing data
DataStreams:	sgpmfr10mC1.b1, sgpmfr10mC1.a0
Description:	Data are missing and unrecoverable.
Measurements:	sgpmfr10mC1.b1: logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) base_time cosine_solar_zenith_angle 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) time_offset 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) alt callang_flags lon head_temp lat sgpmfr10mC1.a0: callang_flags time_offset logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) lon base_time head_temp 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) lat alt

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DQRID : D090226.8

Start Date	Start Time	End Date	End Time
02/13/2004	1702	02/20/2004	1525
07/02/2004	2302	07/06/2004	1502
12/22/2007	1808	12/24/2007	0211
02/04/2009	1609	02/12/2009	1709
11/18/1995	0130	11/20/1995	0232
11/22/1995	2331	11/24/1995	1715
11/25/1995	0431	11/27/1995	0931
12/06/1995	1331	12/10/1995	1653
02/28/1996	2030	03/01/1996	1531
03/02/1996	0232	03/04/1996	0450
04/05/1996	0332	04/08/1996	2010
01/04/1998	0909	01/07/1998	2115
01/11/1998	2011	01/14/1998	1712
02/04/1998	1912	02/06/1998	2212
05/01/1998	1811	05/04/1998	1611
10/31/1998	1114	11/03/1998	1313
12/25/1998	2115	12/28/1998	2015
01/02/1999	1114	01/04/1999	1506
09/30/1996	1932	10/08/1996	2033
11/16/1996	1532	11/18/1996	1533
02/28/1997	1131	03/03/1997	1933
08/12/1997	1510	08/14/1997	1932
10/12/1997	0310	10/15/1997	1416
11/01/1997	0111	11/03/1997	2212
03/13/1999	2123	03/16/1999	0325
10/18/2000	1414	11/09/2000	2316
08/18/2001	0002	08/20/2001	1602
01/30/2002	1802	02/19/2002	1702
03/09/2002	2002	03/12/2002	0702
09/03/1994	1420	09/06/1994	1223
10/08/1994	2320	10/10/1994	0225
12/20/1994	2231	12/29/1994	1634
05/23/1995	1631	05/26/1995	1634

Subject:	SGP/MFR25M/C1 - Missing data
DataStreams:	sgpmfr25mC1.a0, sgpmfr25mC1.b1
Description:	Data are missing and unrecoverable.
Measurements:	sgpmfr25mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) lon time logger_volt cosine_solar_zenith_angle time_offset base_time lat 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) alt callang_flags head_temp sgpmfr25mC1.a0: alt base_time head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) lat 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) callang_flags time logger_volt time_offset lon

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DQRID : D090520.3

Start Date	Start Time	End Date	End Time
05/17/2009	0528	05/20/2009	2300
05/24/2009	0300	06/10/2009	1600

Subject:	SGP/MFR10M/C1 - Heater failure
DataStreams:	sgpmfr10mC1.b1, sgpmfr10mC1.a0
Description:	The heater stopped working on 20090517. Maintenance on 20090520 seemed to resolve the problem, but the heater failed again on 5/24. Additional maintenance on 20090610 seems to have resolved the issue. The instrument is designed to operate with a head temp of around 40 deg C. As the head was at ambient temp during the period covered by this DQR, the mentor suggests looking at the 25m MFR if one is interested in these data.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D091112.3

Start Date	Start Time	End Date	End Time
11/05/2009	1809	11/25/2009	2000

Subject:	SGP/MFR10M/C1 - Bad connection
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	The instrument was pulled for quarterly calibration on 20091105. When the instrument was reinstalled, the head cable was not making a good connection to the head. Cleaning the connector and reinstalling resolved the issue.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D100722.1

Start Date	Start Time	End Date	End Time
05/11/2010	2014	05/13/2010	1505

Subject:	SGP/MFR10M/C1 - Poor connection
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	The instrument was pulled for calibration on 5/11. Upon re-installation, a good connection was not made. Problem resolved on 5/13.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D120229.2

Start Date	Start Time	End Date	End Time
09/09/2010	0000	02/06/2012	2359

Subject:	SGP/MFR10M/C1 - Noise in ch415, sensor degradation
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	This instrument experienced general degradation over a period of more than a year. Please see D120229.3 (DQPR-2693) and D120229.4 (DQPR-2763) for more information. The 415nm channel was noisy. The noise wasn't extreme, so initially at least, the mentor would not expect much impact in using the 415 data. However, toward the end of the period covered by this DQR, we start seeing a general degradation of this instrument. On 20110720, after a calibration, channel 615 is dead. On 20111101 the open channel stops functioning. This instrument is calibrated every three months. The past couple/few calibrations showed a steady decline in the sensitivity of 415. The declining sensitivity should be generally accounted for by each new calibration, but as time moved one, one should become less and less confident in those (415) data. In general, the mentor would suggest using 20110720 as a cut-off date for reliable data (all channels). Caution is given for all channels as the instrument is failing, though the channels not specifically mentioned may be OK.
Measurements:	sgpmfr10mC1.b1: 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) sgpmfr10mC1.a0: 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)

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DQRID : D120229.3

Start Date	Start Time	End Date	End Time
07/19/2011	1304	02/06/2012	2359

Subject:	SGP/MFR10M/C1 - Channel 615 dead
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	This instrument experienced general degradation over a period of more than a year. Please see D120229.2 (DQPR-2564) and D120229.4 (DQPR-2763) for more information. On 20110719 channel 615 stopped functioning.
Measurements:	sgpmfr10mC1.b1: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) sgpmfr10mC1.a0: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)

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DQRID : D120229.4

Start Date	Start Time	End Date	End Time
11/01/2011	2004	02/06/2012	2359

Subject:	SGP/MFR10M/C1 - Broadband channel failure
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	This instrument experienced general degradation over a period of more than a year. Please see D120229.2 (DQPR-2564) and D120229.3 (DQPR-2693) for more information. The open, or broadband, channel died on 20111101.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) sgpmfr10mC1.a0: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)

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DQRID : D941227.4

Start Date	Start Time	End Date	End Time
08/18/1994	1530	08/18/1994	1630
10/19/1994	1420	10/19/1994	1500

Subject:	SGP/MFR10M/C1 - Tower lowered for maintenance
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	The 10-m tower at the central facility central cluster was lowered by site operations personnel for maintenance and repair activities. During this time interval, the multifilter radiometer on the tower had a field of view that were altered, possibly to include some sky radiation. Data from this sensor should not be included in any analyses, for the specified time interval and location.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D950327.1

Start Date	Start Time	End Date	End Time
03/08/1995	2131	03/08/1995	2231

Subject:	SGP/MFR10M/C1 - New datalogger PROM
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	The sgpmfr10m datalogger had its PROM upgraded during a visit by the instrument mentors. The new PROM is Version 13 with the capability of operating the MFR heater without a shadowband motor attached to the MFR head. No operating changes resulted from this upgrade.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) callang_flags cosine_solar_zenith_angle 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: callang_flags head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D960914.17

Start Date	Start Time	End Date	End Time
03/26/1994	0000	03/27/1996	2359

Subject:	SGP/MFR10m/C1 - Small intermittent time stamp error
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	The internal code that runs the MFR data logger had a bug that occasionally caused the time stamp associated with the data to be slightly in error. This error is thought to be very small (say less than 30 seconds) and very infrequent. (Unfortunately, we cannot give firm estimates of the magnitude and frequency of the error). Also, the upwelling MFR measurements were contaminated by electrical noise originating from the heater contained in the sensor head. During the time the sensor head was polled by the data logger, the heater would strobe "on and off", and the noise caused by this strobing could greatly contaminate the data. Some of the data is so contaminated that it is virtually useless. After 96/03/27 these problems were corrected. Those who use the data before this time should realize that the time stamp for each record of data might be slightly in error, and the data could be very noisy due to the heater switching on and off.
Measurements:	sgpmfr10mC1.b1: logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) base_time cosine_solar_zenith_angle 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) time_offset 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) callang_flags head_temp sgpmfr10mC1.a0: callang_flags time_offset 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) base_time head_temp 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)

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DQRID : D960914.18

Start Date	Start Time	End Date	End Time
03/23/1994	0000	03/27/1996	2359

Subject:	SGP/MFR25M/C1 - Intermittent small time stamp error
DataStreams:	sgpmfr25mC1.a0, sgpmfr25mC1.b1
Description:	The internal code that runs the MFR data logger had a bug that occasionally caused the time stamp associated with the data to be slightly in error. This error is thought to be very small (say less than 30 seconds) and very infrequent. (Unfortunately, we cannot give firm estimates of the magnitude and frequency of the error). Also, the upwelling MFR measurements were contaminated by electrical noise originating from the heater contained in the sensor head. During the time the sensor head was polled by the data logger, the heater would strobe "on and off", and the noise caused by this strobing could greatly contaminate the data. Some of the data is so contaminated that it is virtually useless. After 96/03/27 these problems were corrected. Those who use the data before this time should realize that the time stamp for each record of data might be slightly in error, and the data could be very noisy due to the heater switching on and off.
Measurements:	sgpmfr25mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) logger_volt cosine_solar_zenith_angle time_offset base_time 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) callang_flags head_temp sgpmfr25mC1.a0: base_time head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) callang_flags logger_volt time_offset

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DQRID : D961008.1

Start Date	Start Time	End Date	End Time
08/18/1996	0000	10/03/1996	2359

Subject:	SGP/MFR10M/C1 - Corrupt or truncated data
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	On about 96/08/18, the data logger board for the downlooking 10m MFR was modified to test an upgrade. Unfortunately this upgrade did not work as planned, and some data was either corrupted or truncated. You can't miss the corrupted data (from which you can infer albedos much greater than one!). The truncated data is truncated in time, by which we mean that only a half day's worth of data was collected. The daily time span of these truncated data is from midnight to about 1 PM (local time). At about 96/10/03, these problems were corrected. Note: The "begin date" given for this DQR may be off a day or two, so beware.
Measurements:	sgpmfr10mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) cosine_solar_zenith_angle callang_flags 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) head_temp 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) sgpmfr10mC1.a0: callang_flags head_temp logger_volt 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)

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DQRID : D961010.1

Start Date	Start Time	End Date	End Time
08/22/1996	0000	10/08/1996	1900

Subject:	SGP/MFR25M/C1 - poor data quality
DataStreams:	sgpmfr25mC1.a0, sgpmfr25mC1.b1
Description:	In the middle of August, the logger board that collects data from the 25m MFR was upgraded. This upgrade did not work out as planned, and the data quality from the MFR are not good. The poor data is easily identifiable - you'll know it when you see it. After 19961008, a new logger board was installed that solved the problem. Note: the exact date when these problems started is not known with precision; it could be several days prior to or after 960822.
Measurements:	sgpmfr25mC1.b1: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) cosine_solar_zenith_angle callang_flags sgpmfr25mC1.a0: 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband) callang_flags 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6) 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2) 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)

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DQRID : D990906.1

Start Date	Start Time	End Date	End Time
04/15/1999	0000	09/02/1999	2221

Subject:	SGP/MFR10M/C1 - Head heater not working
DataStreams:	sgpmfr10mC1.a0, sgpmfr10mC1.b1
Description:	On 19990415, the tower upon which the 10-m MFR was mounted was dismantled and replaced with a so-called "tippy tower". After the 10-m MFR was reinstalled on the new tower, the mfr head heater did not work, or worked intermittently (at best). A new mfr head was installed on 99.09.02 and that solved the problem. Data was collected from the old head in the morning up to the time it was replaced. Once the new head was installed, data collection resumed. There's a gap of about an hour between the time the old head was removed and the new head was installed. If we try to gauge how well the old head was calibrated by comparing the two segments of data (old head, new head) it appears as if the old head remained in a good state of calibration even though the head heater was not working.
Measurements:	sgpmfr10mC1.b1: head_temp sgpmfr10mC1.a0: head_temp

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