DQRs for Session: 101820 User:blueskyCompleted: 09-29-2006

Data Quality Reports for Session: 101820 User: bluesky Completed: 09/29/2006

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D060803.2	NSA/SONDE/C1 - Noisy/Unstable RH and dew point data	nsasondewnpnC1.b1
D060811.1	NSA/SONDE/C1 - Bad surface RH and temperature values	nsasondewnpnC1.b1

DQRID : D060803.2

Start Date	Start Time	End Date	End Time
07/31/2006	0515	07/31/2006	0523

Subject:	NSA/SONDE/C1 - Noisy/Unstable RH and dew point data
DataStreams:	nsasondewnpnC1.b1
Description:	The RH readings during the first 8 minutes of this sounding include three apparently incorrect oscillations to near-zero values. After checking the absolutely raw data, it seems as though this period was excessively noisy, resulting in many missing values. The noise abatted and the remaining sounding values are valid.
Measurements:	nsasondewnpnC1.b1: Relative humidity scaled, by total column amount from MWR(rh) Surface dew point temperature(dp)

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DQRID : D060811.1

Start Date	Start Time	End Date	End Time
07/30/2006	0522	07/30/2006	0523
08/01/2006	0520	08/01/2006	0521
08/04/2006	0532	08/04/2006	0533
08/06/2006	0528	08/06/2006	0529
08/08/2006	0517	08/08/2006	0518
08/09/2006	0527	08/09/2006	0528
08/11/2006	0525	08/11/2006	0526
08/15/2006	0534	08/15/2006	0535
08/17/2006	0535	08/17/2006	0536
08/18/2006	0516	08/18/2006	0517
08/19/2006	0538	08/19/2006	0539
08/19/2006	1745	08/19/2006	1746
08/20/2006	0532	08/20/2006	0533
08/20/2006	1729	08/20/2006	1730
08/21/2006	0530	08/21/2006	0531
08/22/2006	0524	08/22/2006	0525

Subject:	NSA/SONDE/C1 - Bad surface RH and temperature values
DataStreams:	nsasondewnpnC1.b1
Description:	This is a subtle problem that might escape notice. For the identified sonde launches, the ground station lost its signal between the time it was removed from the ground check set and the time it was launched. As a result, the software, which automatically determines the launch time and surface conditions at time of launch mistakenly used values of temperature and RH representative of the ground check set and the GW rather than of the ambient conditions before launch. The bad values influenced only the first few samples and the remainder of the sounding values are correct. A procedural problem was identified and corrected.
Measurements:	nsasondewnpnC1.b1: Relative humidity scaled, by total column amount from MWR(rh) Dry-Bulb Temperature(tdry) Surface dew point temperature(dp)

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