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NOAA-16 and 17, AVHRR Instrument, Vis-Cal updates, Implementation Date TBA- Issued: Date 18 August 2005; time issued 1950 UTC

*Topic*:
Update to visible calibration coefficients

*Date/Time(UTC) Message Issued:*
18 August 2005 1950 UTC

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

*Instrument(s) Involved:*
AVHRR

*Product(s) Involved/Affected:*
All products using AVHRR channels 1, and 2 on NOAA-16

All products using AVHRR channels 1,2,and 3 on NOAA-17

*Date/Time(UTC) of Initial Implementation:*
TBA

*Details/Specifics of Change:* ive all deta
The following update of the calibration coefficients are recommended for:

NOAA-16 AVHRR

Ch_1_lo = 0.05389*count - 2.078, count<498.96
Ch_1_hi = 0.1573*count - 53.46, count>498.96

Ch_2_lo = 0.05798*count - 2.190, count<500.16
Ch_2_hi = 0.1708*count - 58.63, count>500.16

NOAA-17 AVHRR

Ch_1_lo = 0.05477*count - 2.192, count<501.12
Ch_1_hi = 0.1608*count - 55.32, count>501.12

Ch_2_lo = 0.06655*count - 2.613, count<500.73
Ch_2_hi = 0.1981*count - 68.59, count>500.73

Ch_3_lo = 0.03164*count - 1.334, count<501.37
Ch_3_hi = 0.2218*count - 96.84, count>501.37

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

*Contact Person(s) Name/Email/Phone Number for Questions:*

*Xiangqian Wu, Ph. D.
Physical Scientist, NOAA/NESDIS/ORA
E/RA2, Office 7214, 5200 Auth Rd.
Camp Springs, MD 20746-4304
Phone: 301-763-8136 ext. 138
FAX: 301-763-8580*
Xiangqian.Wu@noaa.gov

*Cecil Paris
Physical Scientist
301-457-5247 ext 129
cecil.paris@noaa.gov*

*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/poesstatus/ - SOCC polar satellites status
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports

--
*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Product Systems Branch
* Pre-Product Processing Group
* E/SP13, 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
*
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ppp@nesdis.noaa.gov

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