Subject:
NOAA-16, 17, 18, & MetOp-2/A, AVHRR, Monthly Visible Calibration, 10 February 2009 - Issued: 10 February 2009 1430 UTC

Topic:
Visible calibration update for month of February 2009

Date/Time(UTC) Message Issued:
10 February 2009, 1430 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 February 2009, Time 1244 UTC

Details/Specifics of Change:

On February 10, NOAA updated the AVHRR visible calibration coefficients for the month of February 2009. The promotion was made at approximately 1244 UTC on 10 February 2009.

For NL/NM/NN, the first orbits processed will be:
NSS.GHRR.NL.D09041.S1041.E1229.B4324142.WI
NSS.HRPT.NL.D09041.S1546.E1600.B4324444.GC

NSS.GHRR.NM.D09041.S0743.E0938.B3447071.WI
NSS.LHRR.NM.D09041.S1246.E1252.B3447373.WI
NSS.HRPT.NM.D09041.S1455.E1509.B3447474.WI

NSS.HRPT.NN.D09041.S1227.E1242.B1920808.EB
NSS.GHRR.NN.D09041.S1025.E1214.B1920708.GC
NSS.LHRR.NN.D09041.S1157.E1209.B1920808.GC

For M2, the first orbit processed will be the one running after orbit:
NCS.FRAC.M2.D09041.S0841.E1022.B1200001.SV

*************** Original Message ******************
The following update of the AVHRR VIS/NIR channel calibration coefficients for MetOp-2/A, NOAA-18, 17, &16 are recommended for February 10, 2009. These coefficients are intended to be optimal on February 24, in the middle of two scheduled updates.

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

Ch_1_lo = 0.05316*count - 2.150, count<501.01
Ch_1_hi = 0.1571*count - 54.22, count>501.01

Ch_2_lo = 0.06349*count - 2.524, count<500.42
Ch_2_hi = 0.1886*count - 65.12, count>500.42

Ch_3_lo = 0.03187*count - 1.310, count<501.94
Ch_3_hi = 0.2213*count - 96.42, count>501.94

**************************************************

NOAA-18 AVHRR

Ch_1_lo = 0.05355*count - 2.112, count<501.54
Ch_1_hi = 0.1597*count - 54.91, count>501.54

Ch_2_lo = 0.06129*count - 2.415, count<500.40
Ch_2_hi = 0.1839*count - 64.07, count>500.40

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

Ch_1_lo = 0.05627*count - 2.252, count<501.12
Ch_1_hi = 0.1652*count - 56.83, count>501.12

Ch_2_lo = 0.06775*count - 2.660, count<500.73
Ch_2_hi = 0.2017*count - 69.83, count>500.73

Ch_3_lo = 0.03291*count - 1.388, count<501.37
Ch_3_hi = 0.2307*count - 100.73, count>501.37

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

Ch_1_lo = 0.05687*count - 2.193, count<498.96
Ch_1_hi = 0.1660*count - 56.41, count>498.96

Ch_2_lo = 0.06212*count - 2.347, count<500.16
Ch_2_hi = 0.1830*count - 62.82, 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

NOAA-16, 17, 18, & MetOp-2/A, AVHRR, Monthly Visible Calibration, 10 February 2009 - Issued: 10 February 2009 1430 UTC.eml

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