DQRs for Session: 180653 User:allisonmCompleted: 10-21-2016

Data Quality Reports for Session: 180653 User: allisonm Completed: 10/21/2016

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected	Data Quality Metric
D140418.1	SGP/ACSM/C1 - Data not available and unrecoverable	sgpaosacsmC1.b1	Missing
D140627.1	SGP/ACSM/C1 - Windows 7 upgrade and turbo molecular pump failure.	sgpaosacsmC1.b1	Missing
D141009.2	SGP/ACSM/C1 - Reprocessing Notice (RID 1237)	sgpaosacsmC1.b1	Does not affect quality
D141107.1	SGP/ACSM/C1 - computer software problem	sgpaosacsmC1.b1	Missing
D141107.5	SGP/ACSM/C1 - Pump Failure	sgpaosacsmC1.b1	Missing
D141205.1	SGP/ACSM/C1 - Unexpected instrument shutdown	sgpaosacsmC1.b1	Incorrect
D150210.1	SGP/ACSM/C1 - Clogged critical orifice	sgpaosacsmC1.b1	Incorrect
D150223.2	SGP/ACSM/C1 - Critical orifice clogged	sgpaosacsmC1.b1	Missing
D150410.1	SGP/ACSM/C1 - missing data	sgpaosacsmC1.b1	Missing
D150410.2	SGP/ACSM/C1 - missing data	sgpaosacsmC1.b1	Missing
D150410.3	SGP/ACSM/C1 - missing data	sgpaosacsmC1.b1	Missing
D150410.4	SGP/ACSM/C1 - missing data	sgpaosacsmC1.b1	Missing
D150429.4	SGP/ACSM/C1 - Vacuum pump failure	sgpaosacsmC1.b1	Incorrect
D150513.1	SGP/ACSM/C1 - Sampling pump failure	sgpaosacsmC1.b1	Incorrect
D150702.7	SGP/ACSM/C1 - Missing data	sgpaosacsmC1.b1	Missing
D150708.1	SGP/ACSM/C1 - Power outage and calibration	sgpaosacsmC1.b1	Missing
D150819.1	SGP/ACSM/C1 - Instrument inlet pressure low	sgpaosacsmC1.b1	Suspect
D150925.1	SGP/ACSM/C1 - Instrument averaging time changed	sgpaosacsmC1.b1	Does not affect quality
D151120.1	SGP/ACSM/C1 - Filter switching valve failure	sgpaosacsmC1.b1	Incorrect
D160104.7	SGP Site Power Outage Due to Winter Storm	sgpaosacsmC1.b1	Does not affect quality
D160105.1	SGP/ACSM/C1 - Power outage	sgpaosacsmC1.b1	Missing
D160715.4	SGP/ACSM/NEPHELOMETER/TDMA/C1 - Data Quality Evaluation Ongoing	sgpaosacsmC1.b1	Does not affect quality

DQRID : D140418.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/08/2014	0200	02/19/2014	1000	Missing

Subject:	SGP/ACSM/C1 - Data not available and unrecoverable
DataStreams:	sgpaosacsmC1.b1
Description:	There are no data for this time period. The ionization filament burned out. The mentor switched to a backup filament on 2/17 and the data stream was good after it was adjusted and monitored on 2/19.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D140627.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/25/2014	1100	06/24/2014	0000	Missing

Subject:	SGP/ACSM/C1 - Windows 7 upgrade and turbo molecular pump failure.
DataStreams:	sgpaosacsmC1.b1
Description:	Instrument was not operational during this period because of turbo molecular pump failure. the pump was replaced and the instrument restarted.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D141009.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
07/01/2012	0000	10/09/2014	0000	Does not affect quality

Subject:	SGP/ACSM/C1 - Reprocessing Notice (RID 1237)
DataStreams:	sgpaosacsmC1.b1
Description:	See below for details of reprocessing that was completed on 20150610. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- The data will be reprocessed with the manufacturer's software to correct errors in the calibration values, collection efficiencies, and instrument response. The data in the current form is incorrect and should not be used.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D141107.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
10/14/2014	1300	10/27/2014	1530	Missing

Subject:	SGP/ACSM/C1 - computer software problem
DataStreams:	sgpaosacsmC1.b1
Description:	There are no data for the time range specified
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D141107.5

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/25/2014	1100	06/23/2014	1900	Missing

Subject:	SGP/ACSM/C1 - Pump Failure
DataStreams:	sgpaosacsmC1.b1
Description:	Turbo pump failure. No data are available for the specified times.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D141205.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
12/03/2014	1625	12/04/2014	2030	Incorrect

Subject:	SGP/ACSM/C1 - Unexpected instrument shutdown
DataStreams:	sgpaosacsmC1.b1
Description:	There was an unexpected shutdown of the ionizer, vaporizer, SEM, and inlet valve, possibly caused by a power outage. This resulted in incorrect data values.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D150210.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/09/2015	1930	02/10/2015	1740	Incorrect

Subject:	SGP/ACSM/C1 - Clogged critical orifice
DataStreams:	sgpaosacsmC1.b1
Description:	Instrument was shut down overnight to clean critical orifice. No useful data were taken during this time.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D150223.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/09/2015	1930	02/10/2015	1740	Missing

Subject:	SGP/ACSM/C1 - Critical orifice clogged
DataStreams:	sgpaosacsmC1.b1
Description:	Inlet pressure was low because the critical orifice was clogged. Orifice was cleaned and the instrument restored to operation.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150410.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
07/29/2011	1307	08/02/2011	1416	Missing
08/08/2011	1012	08/09/2011	2154	Missing
12/31/2011	2216	12/31/2011	2320	Missing
11/23/2011	1839	11/25/2011	1529	Missing
10/18/2011	0906	10/18/2011	1042	Missing
12/30/2011	2023	12/30/2011	2126	Missing
12/31/2011	1938	12/31/2011	2042	Missing
07/14/2011	2250	07/18/2011	1945	Missing
12/27/2011	1755	12/27/2011	1859	Missing
03/01/2011	0000	03/01/2011	2359	Missing
10/09/2011	1256	10/09/2011	1947	Missing

Subject:	SGP/ACSM/C1 - missing data
DataStreams:	sgpaosacsmC1.b1
Description:	Data for the specified periods are missing because if instrument problems.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150410.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
10/03/2012	0140	10/03/2012	1832	Missing
11/11/2012	2201	11/15/2012	0051	Missing
03/21/2012	1058	03/21/2012	1233	Missing
04/01/2012	0102	04/03/2012	0913	Missing
05/23/2012	1806	05/23/2012	1909	Missing
07/02/2012	1623	07/03/2012	2105	Missing
07/12/2012	1038	07/30/2012	2221	Missing
06/01/2012	0000	07/01/2012	0000	Missing
11/20/2012	1358	11/21/2012	1633	Missing

Subject:	SGP/ACSM/C1 - missing data
DataStreams:	sgpaosacsmC1.b1
Description:	Data for the periods specified is missing because of instrument problems.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150410.3

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/27/2013	1619	05/27/2013	1723	Missing
07/01/2013	2347	07/04/2013	0223	Missing
05/10/2013	0232	05/24/2013	1733	Missing
12/09/2013	1441	12/10/2013	1618	Missing
06/09/2013	0250	06/13/2013	2223	Missing
10/25/2013	1903	10/31/2013	1418	Missing
09/21/2013	2157	09/21/2013	2300	Missing
02/26/2013	0341	02/28/2013	0512	Missing
04/01/2013	0102	04/03/2013	0913	Missing

Subject:	SGP/ACSM/C1 - missing data
DataStreams:	sgpaosacsmC1.b1
Description:	Data from the specified time periods are missing because of instrument problems.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150410.4

Start Date	Start Time	End Date	End Time	Data Quality Metric
10/05/2014	2054	10/06/2014	1916	Missing
05/25/2014	0000	10/01/2014	0000	Missing
10/28/2014	1324	10/28/2014	1422	Missing
02/08/2014	0100	02/23/2014	0314	Missing
05/05/2014	1248	05/05/2014	1352	Missing
10/09/2014	1300	10/09/2014	1937	Missing
12/03/2014	1432	12/05/2014	0214	Missing
10/15/2014	1656	10/27/2014	1617	Missing
01/30/2014	1537	01/30/2014	1744	Missing
03/05/2014	1440	03/05/2014	1544	Missing

Subject:	SGP/ACSM/C1 - missing data
DataStreams:	sgpaosacsmC1.b1
Description:	Data are missing for the specified periods because of instrument problems. Data for the period from the end of May through end of September are missing because of the failure of two turbo pumps and the return of the instrument to the manufacturer for service.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150429.4

Start Date	Start Time	End Date	End Time	Data Quality Metric
04/08/2015	0530	04/27/2015	1440	Incorrect

Subject:	SGP/ACSM/C1 - Vacuum pump failure
DataStreams:	sgpaosacsmC1.b1
Description:	The vacuum pump used for pulling samples past the inlet of the ACSM failed. The instrument was operational, but not seeing any aerosol. Replacement of the pump solved the problem.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D150513.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
04/08/2015	0337	04/24/2015	2150	Incorrect

Subject:	SGP/ACSM/C1 - Sampling pump failure
DataStreams:	sgpaosacsmC1.b1
Description:	The filter switching valve and sampling pump failed. Data were collected, but no external air was being drawn into the system so there is no aerosol signal.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D150702.7

Start Date	Start Time	End Date	End Time	Data Quality Metric
06/24/2015	1804	06/26/2015	1506	Missing

Subject:	SGP/ACSM/C1 - Missing data
DataStreams:	sgpaosacsmC1.b1
Description:	The data acquisition program locked up during the period specified. Program restarted and the instrument began collecting data.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150708.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
07/06/2015	0236	07/07/2015	2243	Missing

Subject:	SGP/ACSM/C1 - Power outage and calibration
DataStreams:	sgpaosacsmC1.b1
Description:	There was a power outage on 2015-07-06 that shut down the instrument.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D150819.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
08/11/2015	1739	10/06/2015	1927	Suspect

Subject:	SGP/ACSM/C1 - Instrument inlet pressure low
DataStreams:	sgpaosacsmC1.b1
Description:	The pressure at the inlet to the instrument was at least 100 torr below ambient after work was performed on the vacuum line serving the ACSM. The inlet pressure also dropped from 1.3 torr to approximately 1 torr. Examination of the data during reprocessing shows that aerosol loadings during the period specified are unreasonably low and suggest that the instrument was not sampling ambient air. The data for the specified period are unreliable and should not be used. I visited SPG to perform ACSM tuning and calibration on 2015-10-06. While there I measured the flow in the line bringing sample to the ACSM. The flow was > 45 lpm. This high rate was pulling a vacuum on the ACSM sampling line. The vacuum was high when the cyclone was in line upstream of the ACSM and was the cause of the low pressure seen after the changes to the system were made in August. The flow past the ACSM inlet should be 3 lpm. The inlet pressure was ~700 torr when it should be ambient. I disconnected the sampling line from the Gast vacuum pump and reconnected and connected it to the Aerodyne pump which is part of the dryer system. The flow rate is now 3 lpm, the ambient pressure 740 torr, and the inlet pressure 1.3 torr. The instrument was calibrated and is now performing properly.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium)

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DQRID : D150925.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
08/26/2015	1900	09/22/2015	1319	Does not affect quality

Subject:	SGP/ACSM/C1 - Instrument averaging time changed
DataStreams:	sgpaosacsmC1.b1
Description:	The number of sets collected in each data write was changed when the instrument was restarted on 2015-08-26. This resulted in a change in the averaging time from 30 minutes to 10 minutes. Users should be aware that the data during this period are 10 minute averages and not the standard 30 minute average. The original settings were restored on 2015-09-22 at 13:19. Other than the change in averaging time the data are unaffected.
Measurements:	sgpaosacsmC1.b1: Mass concentration of chloride, ambient aerosol in air(chloride) time_offset org_mx base_time Mass concentration of total organics, ambient aerosol in air.(total_organics) amus org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of sulfate, ambient aerosol in air.(sulfate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time

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DQRID : D151120.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
11/03/2015	1803	11/18/2015	1836	Incorrect

Subject:	SGP/ACSM/C1 - Filter switching valve failure
DataStreams:	sgpaosacsmC1.b1
Description:	There are no data available for the period the switching valve was not working.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D160104.7

Start Date	Start Time	End Date	End Time	Data Quality Metric
12/26/2015	0000	01/01/2016	2359	Does not affect quality

Subject:	SGP Site Power Outage Due to Winter Storm
DataStreams:	sgpaosacsmC1.b1
Description:	On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result was very very slick roads and mass power outages. The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th. The power was restored on 7:56 PM CDT on Wednesday, December 30th Site Emergency procedures were activated and Technicians drained water out of instrument reservoirs and other measures as needed, early Monday morning. On Wednesdays as roads and power started was restored to much of the areas east of I-35 , Site Technicians performed maintenance on several Extended Facilities. During this period, data are potentially missing, incorrect, or suspect. Carefully inspect the data before use.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D160105.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
12/28/2015	0129	01/04/2016	1558	Missing

Subject:	SGP/ACSM/C1 - Power outage
DataStreams:	sgpaosacsmC1.b1
Description:	Power was out at the SGP central facility from 2015-12-28 to 2015-12-30. The instrument was restarted on 2016-01-04. There are no data for the time period specified.
Measurements:	sgpaosacsmC1.b1: time_offset base_time org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) Mass concentration of ammonium, ambient aerosol in air(ammonium) time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx Mass concentration of total organics, ambient aerosol in air.(total_organics) amus Mass concentration of sulfate, ambient aerosol in air.(sulfate) East longitude(lon) Altitude above mean sea level(alt)

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DQRID : D160715.4

Start Date	Start Time	End Date	End Time	Data Quality Metric
03/01/2011	0012	09/30/2014	2359	Does not affect quality

Subject:	SGP/ACSM/NEPHELOMETER/TDMA/C1 - Data Quality Evaluation Ongoing
DataStreams:	sgpaosacsmC1.b1
Description:	A closure analysis is currently being perform on the ACSM, TDMA, and wet and dry NOAA NEPHELOMETERS at SGP C1. If problems are found during this analysis, they will be promptly documented through the DQR system. The results of this analysis will be made available once completed. Please contact the respective instrument mentors with any questions regarding these data over the specified period.
Measurements:	sgpaosacsmC1.b1: time_bounds time_offset qc_total_organics qc_ammonium base_time org_mx_err qc_org_mx_err Mass concentration of nitrate, ambient aerosol in air.(nitrate) qc_org_mx Mass concentration of ammonium, ambient aerosol in air(ammonium) qc_nitrate time Mass concentration of chloride, ambient aerosol in air(chloride) North latitude(lat) org_mx qc_sulfate Mass concentration of total organics, ambient aerosol in air.(total_organics) amus qc_chloride Mass concentration of sulfate, ambient aerosol in air.(sulfate) Altitude above mean sea level(alt) East longitude(lon)

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END OF DATA