DQRs for Session: 136255 User:wljCompleted: 07-19-2011

Data Quality Reports for Session: 136255 User: wlj Completed: 07/19/2011

TABLE OF CONTENTS

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.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.a0, sgpmfr10mC1.b1
D090520.3	SGP/MFR10M/C1 - Heater failure	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D091112.3	SGP/MFR10M/C1 - Bad connection	sgpmfr10mC1.a0, sgpmfr10mC1.b1
D100722.1	SGP/MFR10M/C1 - Poor connection	sgpmfr10mC1.a0, sgpmfr10mC1.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 : 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
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: 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 : 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.a0, sgpmfr10mC1.b1
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) 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 : 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 : 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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