Data Quality Reports for Session: 113300 User: wlj Completed: 07/21/2008


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060310.1NIM/AOS/M1 - Time uncertaintynimnoaaaosM1.00


DQRID : D060310.1
Start DateStart TimeEnd DateEnd Time
12/04/2005000012/10/20051614
Subject:
NIM/AOS/M1 - Time uncertainty
DataStreams:nimnoaaaosM1.00
Description:
We discovered a problem with the laptop computer being able to keep correct time on 
12/02/2005. The time was drifting by as much as 25 sec per minute and causing multiple entries 
at the same time. The problem seemed to have resolved itself within a few days.  On 
12/11/2005 we noted that the computer clock was within 1 second of the time.gov atomic clock.

Data before 12/04/2005 was edited out as the computer clock was off and during this period 
the instruments were being set and calibrated. The time offset for the time between 
12/04/2006 and 12/11/2006 was verified by comparing a fast response temperature sensor on the 
AOS stack outside the trailer to the time response of the temperature sensor on the 
microwave radiometer profiler(mwrp). The two temperature signals were within 15 minutes of 
each other. We estimate the time uncertainty associated with the AOS data during this time 
period to be +/- 15 minutes.

Please see 
 
http://www.db.arm.gov/PIFCARDQR2/attachment/gif_attachments/NIM_T.jpg 
Measurements:nimnoaaaosM1.00:
  • Raw data stream - documentation not supported(raw)


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