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NOAA-16, 17, 18, & MetOp-2/A, AVHRR, Monthly Visible Calibration Early Update, 7 April 2008 - Issued: 7 April 2008; 1850 UTC

Topic:
Visible calibration update for month of April 2008

Date/Time(UTC) Message Issued:
7 April 2008, 1850 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:
7 April 2008, Time 1500 UTC

Details/Specifics of Change:
NOAA-16, NOAA-17, NOAA-18, and MetOp-2 visible calibration update was performed one day early on April 7 around 1500 UTC. this was done due to the MetOp-2/A maneuver planned for April 8 and internal NOAA POES data testing also scheduled for April 8. The first data to be processed after the update are:

NSS.GHRR.NN.D08098.S1405.E1551.B1485152.GC
NSS.HRPT.NN.D08098.S1552.E1605.B1485252.GC

NSS.GHRR.NM.D08098.S1416.E1601.B3007677.WI

NSS.HRPT.NM.D08098.S1602.E1615.B3007777.WI
NSS.GHRR.NL.D08098.S1238.E1432.B3888081.GC

NSS.HRPT.NL.D08098.S1441.E1450.B3888181.EB
NSS.FRAC.M2.D08098.S1332.E1512.B0761314.SV

********* Original Message **********

Followings are the updates of AVHRR visible calibration coefficients for April 2008. The updates are recommended on April 8. These coefficients are intended to be optimal on April 26, in the middle of the two scheduled updates.

Metop-A/2

Ch_1_lo = 0.05269*count - 2.131, count<501.00
Ch_1_hi = 0.1557*count - 53.74, count>501.00

Ch_2_lo = 0.06218*count - 2.472, count<500.00
Ch_2_hi = 0.1847*count - 63.77, count>500.00

Ch_3_lo = 0.03088*count - 1.269, count<502.00
Ch_3_hi = 0.2145*count - 93.41, count>502.00

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

NOAA-18 AVHRR

Ch_1_lo = 0.05334*count - 2.103, count<501.00
Ch_1_hi = 0.1590*count - 54.69, count>501.00

Ch_2_lo = 0.06116*count - 2.409, count<500.00
Ch_2_hi = 0.1835*count - 63.94, count>500.00

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

NOAA-17 AVHRR

Ch_1_lo = 0.05598*count - 2.240, count<501.12
Ch_1_hi = 0.1643*count - 56.54, count>501.12

Ch_2_lo = 0.06738*count - 2.645, count<500.73
Ch_2_hi = 0.2006*count - 69.44, count>500.73

Ch_3_lo = 0.03260*count - 1.374, count<501.37
Ch_3_hi = 0.2285*count - 99.77, count>501.37

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

Ch_1_lo = 0.05624*count - 2.168, count<498.96
Ch_1_hi = 0.1642*count - 55.79, count>498.96

Ch_2_lo = 0.06120*count - 2.312, count<500.16
Ch_2_hi = 0.1803*count - 61.89, 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

*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, NSOF, room 1460
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-817-3882
* fax 301-817-4436
* email Emily.Harrod@noaa.gov
*
*******************************************


ppp@nesdis.noaa.gov

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