[nws-changes] 20071116: NOAA 18

[Linda Miller]

ubject:
NOAA-18, AMSU-A, Channel 9 Anomaly, 14 Novmber 2007 - Issued: 15 
November 2007; 1830 UTC
From:
Emily Harrod <Emily.Harrod at noaa.gov>
Date:
Fri, 16 Nov 2007 13:28:35 -0500

To:
undisclosed-recipients: ;


*Topic:*
    Noise in radiometric data

*Date/Time(UTC) Message Issued:*
    16 November 2007, 1830 UTC

*Satellite(s) Involved:*
     NOAA-18

*Instrument(s) Involved:*
     AMSU-A

*Product(s) Involved/Affected:*
    Those using channel 9

*Date/Time(UTC) of Initial Implementation:*
    14 November 2007, Time 1852 UTC

*Details/Specifics of Change:*
On November 14 (day 318) and 15 (day 319), an anomaly was detected in 
several passes of the NOAA-18 AMSU-A (see below).  Noise was detected in 
channel 9 radiometric data.  This appeared to be a sporadic problem that 
affected several scans in the mid latitudes.  In the level 1b data, the 
channel 9 calibration quality flag bit 5 was set in the data record when 
the anomaly occurred.  Data was affected within passes with data times 
between day 318 at 1852 UTC through day 319 at 0534 UTC for the first 
occurrence and between day 319 at 1030 UTC through 1541 UTC for the 
second occurrence.  NOAA has a team investigating the anomaly.

Nov 14 21:13 NSS.AMAX.NN.D07318.S1852.E2047.B1280810.GC
Nov 14 22:53 NSS.AMAX.NN.D07318.S2041.E2229.B1281011.GC
Nov 15 00:35 NSS.AMAX.NN.D07318.S2223.E0012.B1281112.GC
Nov 15 02:54 NSS.AMAX.NN.D07319.S0006.E0201.B1281213.SV
Nov 15 04:33 NSS.AMAX.NN.D07319.S0155.E0344.B1281314.SV
Nov 15 06:03 NSS.AMAX.NN.D07319.S0339.E0534.B1281415.WI

Nov 15 12:43 NSS.AMAX.NN.D07319.S1030.E1220.B1281819.GC
Nov 15 14:24 NSS.AMAX.NN.D07319.S1214.E1401.B1281920.GC
Nov 15 16:03 NSS.AMAX.NN.D07319.S1355.E1541.B1282021.GC

*Contact Person(s) Name/Email/Phone Number for Questions:*
  Emily Harrod,  Emily.Harrod at noaa.gov,  301-817-3882
  ESPC Operations,  ESPCoperations at noaa.gov, 301-817-3880

*Web site(s) that contain other relevant information (where applicable):*
     http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B 
notices
     http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices
     http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status
     http://www.oso.noaa.gov/goes/index.htm - SOCC geostationary 
satellite status
     http://www.oso.noaa.gov/daily-news/index.asp 
<http://www.oso.noaa.gov/daily-news/index.htm> - SOCC morning reports
 
 


-- 
*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, NSOF, room 1460
* 4231 Suitland Road
* Suitland, Maryland  20746-4304
* USA
* voice 301-817-3882
* fax   301-817-3902
* email Emily.Harrod at noaa.gov
*
*******************************************