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NOAA-16, 17, & 18, AVHRR, January Visible Calibraton Update, 10 January 2006 - Issued: 06 January 2006; 1600 UTC

*Topic*:
AVHRR Visible Calibration Update for January 2006

*Date/Time(UTC) Message Issued:*
06 January 2006, 1600 UTC

*Satellite(s) Involved:*
NOAA-16, 17, and 18

*Instrument(s) Involved:*
AVHRR

*Product(s) Involved/Affected:*
NOAA-16 channels 1 and 2
NOAA-17 channels 1, 2, and 3
NOAA-18 channels 1 and 2

*Date/Time(UTC) of Initial Implementation:*
10 January 2006, Time TBD UTC

*Details/Specifics of Change:*
The following update of the visible calibration coefficients are planned for January 10, 2006:

NOAA-16 AVHRR
Ch_1_lo = 0.05418*count - 2.089, count<498.96
Ch_1_hi = 0.1581*count - 53.75, count>498.96

Ch_2_lo = 0.05835*count - 2.204, count<500.16
Ch_2_hi = 0.1719*count - 59.00, count>500.16

NOAA-17 AVHRR
Ch_1_lo = 0.05494*count - 2.199, count<501.12
Ch_1_hi = 0.1613*count - 55.50, count>501.12

Ch_2_lo = 0.06649*count - 2.611, count<500.73
Ch_2_hi = 0.1979*count - 68.53, count>500.73

Ch_3_lo = 0.03181*count - 1.341, count<501.37
Ch_3_hi = 0.2230*count - 97.35, count>501.37

NOAA-18 AVHRR
Ch_1_lo = 0.05346*count - 2.108, count<500.54
Ch_1_hi = 0.1594*count - 54.82, count>500.54

Ch_2_lo = 0.06140*count - 2.419, count<500.40
Ch_2_hi = 0.1842*count - 64.19, count>500.40

These coefficients are intended to be optimal on January 27, in the middle of the two scheduled updates.

*Contact Person(s) Name/Email/Phone Number for Questions:*
Xiangqian.Wu@noaa.gov 301-763-8136 ext. 138 instrument scientist
Emily.Harrod@noaa.gov 301-457-5247 ext. 117 with ops questions

*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.htm - SOCC morning reports

*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, Federal Building #4, room 0318
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-457-5247 ext 117
* fax 301-457-5199
* email Emily.Harrod@noaa.gov
*
*******************************************


ppp@nesdis.noaa.gov

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