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NOAA-16, 17, 18, & MetOp-2/A, AVHRR, Monthly Visible Calibration Update, 10 June 2008 - Issued: 3 June 2008; 1700 UTC

Topic:
Visible calibration update for month of June 2008

Date/Time(UTC) Message Issued:
3 June 2008, 1700 UTC

Satellite(s) Involved:
NOAA-16, 17, 18, & MetOp-2/A

Instrument(s) Involved:
AVHRR

Product(s) Involved/Affected:
All Products from channels 1, 2, and 3a.

Date/Time(UTC) of Initial Implementation:
10 June 2008, Time TBD UTC

Details/Specifics of Change:

Followings are the AVHRR solar reflective channels calibration coefficient updates for the month of June 2008. Please note that starting with the May 2008 update, all the Metop-2/A calibration coefficients are and will be generated using its own Bi-directional Reflectance Distribution Function (BRDF).

The update of the calibration coefficients will occur on June 10. These coefficients are intended to be optimal on June 24, in the middle of the two scheduled updates.

*********************************************************
Metop-A/2

Ch_1_lo = 0.05287*count - 2.138, count<501.00
Ch_1_hi = 0.1562*count - 53.93, count>501.00

Ch_2_lo = 0.06264*count - 2.490, count<500.00
Ch_2_hi = 0.1861*count - 64.25, count>500.00

Ch_3_lo = 0.03148*count - 1.293, count<502.00
Ch_3_hi = 0.2186*count - 95.23, count>502.00

***********************************************************
NOAA-18 AVHRR

Ch_1_lo = 0.05329*count - 2.101, count<501.00
Ch_1_hi = 0.1589*count - 54.64, count>501.00

Ch_2_lo = 0.06091*count - 2.400, count<500.00
Ch_2_hi = 0.1827*count - 63.68, count>500.00

***********************************************************
NOAA-17 AVHRR

Ch_1_lo = 0.05601*count - 2.241, count<501.12
Ch_1_hi = 0.1644*count - 56.57, count>501.12

Ch_2_lo = 0.06740*count - 2.646, count<500.73
Ch_2_hi = 0.2006*count - 69.46, count>500.73

Ch_3_lo = 0.03264*count - 1.376, count<501.37
Ch_3_hi = 0.2288*count - 99.89, count>501.37

*********************************************************
NOAA-16 AVHRR

Ch_1_lo = 0.05636*count - 2.173, count<498.96
Ch_1_hi = 0.1645*count - 55.91, count>498.96

Ch_2_lo = 0.06138*count - 2.319, count<500.16
Ch_2_hi = 0.1808*count - 62.07, count>500.16

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

Emily Harrod Emily.Harrod@noaa.gov 301-817-3882 operations support
Xiangqian Wu Xiangqian.Wu@noaa.gov 301-763-8136 x 138 instrument scientist

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


ppp@nesdis.noaa.gov

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