Topic:
Anomaly 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@noaa.gov, 301-817-3882
ESPC Operations, ESPCoperations@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 - SOCC morning reports
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*
* 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@noaa.gov
*
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