DQRs for Session: 142549 User:cw101Completed: 05-22-2012

Data Quality Reports for Session: 142549 User: cw101 Completed: 05/22/2012

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D111017.1	GAN/GNDRAD/M1 - IRT calibration error	gangndrad60sM1.b1
D111101.1	GAN/GNDRAD/M1 - Incorrect up_long_hemisp	gangndrad20sM1.a0, gangndrad60sM1.b1
D120113.7	GAN/SKYRAD/M1 - Degraded IRT mirror	ganskyrad60sM1.b1
D120127.1	GAN/SKYRAD/M1 - PIR2 failure	ganskyrad20sM1.a0, ganskyrad60sM1.b1
D120309.2	GAN/SKYRAD/M1 - PIR1 failure	ganskyrad20sM1.a0, ganskyrad60sM1.b1

DQRID : D111017.1

Start Date	Start Time	End Date	End Time
09/23/2011	0742	10/09/2011	0413

Subject:	GAN/GNDRAD/M1 - IRT calibration error
DataStreams:	gangndrad60sM1.b1
Description:	The IRT surface temperature reported was incorrect because the analog output configuration did not agree with the data logger scale factors. The IRT configuration was corrected on 10/9.
Measurements:	gangndrad60sM1.b1: Effective Surface (Skin) Temperature(sfc_ir_temp) Surface Infra-Red Temperature Minima(sfc_ir_temp_min) Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

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DQRID : D111101.1

Start Date	Start Time	End Date	End Time
09/25/2011	0000	10/05/2011	0444

Subject:	GAN/GNDRAD/M1 - Incorrect up_long_hemisp
DataStreams:	gangndrad20sM1.a0, gangndrad60sM1.b1
Description:	The up_long_hemisp values from the pyrgeometer were much too low, hovering near or just above 100 W/m^2. This was particularly noticeable when comparing these values to those derived from the surface IRT. On 10/05/11, at 0348Z, tower was lowered for removal of PIR SN35836 and installation of PIR SN35839; tower raised at 0444Z. Following installation of PIR SN35839, data quality plots indicate proper up_long_hemisp values.
Measurements:	gangndrad20sM1.a0: inst_up_long_hemisp_dome_resist inst_up_long_hemisp_case_resist inst_up_long_hemisp_tp gangndrad60sM1.b1: up_long_hemisp_std Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max) Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min) Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp) inst_up_long_hemisp_tp inst_up_long_hemisp_dome_temp inst_up_long_hemisp_case_temp

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DQRID : D120113.7

Start Date	Start Time	End Date	End Time
11/29/2011	1424	01/04/2012	0529

Subject:	GAN/SKYRAD/M1 - Degraded IRT mirror
DataStreams:	ganskyrad60sM1.b1
Description:	The gold mirror was worn and needed to be replaced. Degradation of the mirror occurs gradually and it is difficult to determine when it begins to affect the measurement. To estimate the beginning of the problem, I used the time when the difference in IR sky temperature from the MWR3C was consistantly greater that 2.4K (2 times the resolution of the IRT measurement). The problem was corrected when the mirror was replaced.
Measurements:	ganskyrad60sM1.b1: IR Brightness Temperature(sky_ir_temp) sky_ir_temp_std sky_ir_temp_min sky_ir_temp_max

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DQRID : D120127.1

Start Date	Start Time	End Date	End Time
12/12/2011	0000	12/27/2011	0542

Subject:	GAN/SKYRAD/M1 - PIR2 failure
DataStreams:	ganskyrad20sM1.a0, ganskyrad60sM1.b1
Description:	Increasing difference between PIR1 and PIR2 beginning December 12. Suspected problem with PIR2 thermistor bridge or instrument thermistor. OPS replaced PIR2 unit with a spare. The data from PIR2 after replacement appears to be normal.
Measurements:	ganskyrad60sM1.b1: down_long_hemisp2_max down_long_hemisp2_min inst_down_long_hemisp2_case_temp down_long_hemisp2_std inst_down_long_hemisp2_tp Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2) inst_down_long_hemisp2_dome_temp ganskyrad20sM1.a0: inst_down_long_hemisp2_case_resist inst_down_long_hemisp2_tp inst_down_long_hemisp2_dome_resist

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DQRID : D120309.2

Start Date	Start Time	End Date	End Time
01/31/2012	0400	02/09/2012	0600

Subject:	GAN/SKYRAD/M1 - PIR1 failure
DataStreams:	ganskyrad20sM1.a0, ganskyrad60sM1.b1
Description:	PIR1 irradiance data are incorrect beginning Feb 4th and questionable as far back as Jan 31st around 0400 UTC. Site operations ceased Feb 9 before repairs were made.
Measurements:	ganskyrad60sM1.b1: inst_down_long_hemisp1_tp inst_down_long_hemisp1_case_temp down_long_hemisp1_std Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1) inst_down_long_hemisp1_dome_temp down_long_hemisp1_min down_long_hemisp1_max ganskyrad20sM1.a0: inst_down_long_hemisp1_tp inst_down_long_hemisp1_case_resist inst_down_long_hemisp1_dome_resist

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