[nws-changes] 20081113: AVHRR

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*Topic:
***Visible calibration update for month of November 2008

*Date/Time(UTC) Message Issued:*
13 November 2008, 1350 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:*
12 November 2008, Time 1603 UTC

*Details/Specifics of Change:*
On November 13, 2008, around 1603 UTC, NOAA completed the November AVHRR visible calibration updates for NL/NM/NN, the first orbits processed will be: 

NSS.HRPT.NL.D08317.S1655.E1708.B4197474.EB
NSS.GHRR.NL.D08317.S1644.E1822.B4197475.GC

NSS.HRPT.NM.D08317.S1626.E1637.B3319494.WI
NSS.GHRR.NM.D08317.S1438.E1625.B3319394.WI
NSS.LHRR.NM.D08317.S1556.E1605.B3319494.WI

NSS.HRPT.NN.D08317.S1615.E1628.B1794141.GC
NSS.GHRR.NN.D08317.S1429.E1615.B1794041.GC
NSS.LHRR.NN.D08317.S1531.E1540.B1794040.GC

For M2, the first orbit processed will be the one running after orbit:

NSS.FRAC.M2.D08317.S1303.E1444.B1072425.SV
The following update of the calibration coefficients for MetOp-2/A, NOAA-18, 17, &16 are recommended for November 12. These coefficients are intended to be optimal on November 25, 2008, in the middle of the two scheduled updates. 

Metop-A/2

 Ch_1_lo = 0.05297*count -  2.142, count<501.00
 Ch_1_hi =  0.1565*count -  54.02, count>501.00


 Ch_2_lo = 0.06283*count -  2.497, count<500.00
 Ch_2_hi =  0.1866*count -  64.43, count>500.00


 Ch_3_lo = 0.03161*count -  1.299, count<502.00
 Ch_3_hi =  0.2196*count -  95.65, count>502.00

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

 Ch_1_lo = 0.05344*count -  2.107, count<501.00
 Ch_1_hi =  0.1593*count -  54.80, count>501.00


 Ch_2_lo = 0.06140*count -  2.419, count<500.00
 Ch_2_hi =  0.1842*count -  64.19, count>500.00

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

 Ch_1_lo = 0.05615*count -  2.247, count<501.12
 Ch_1_hi =  0.1649*count -  56.71, count>501.12


 Ch_2_lo = 0.06756*count -  2.652, count<500.73
 Ch_2_hi =  0.2011*count -  69.62, count>500.73


 Ch_3_lo = 0.03280*count -  1.383, count<501.37
 Ch_3_hi =  0.2299*count - 100.37, count>501.37

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

 Ch_1_lo = 0.05668*count -  2.185, count<498.96
 Ch_1_hi =  0.1654*count -  56.22, count>498.96


 Ch_2_lo = 0.06185*count -  2.336, count<500.16
 Ch_2_hi =  0.1822*count -  62.54, count>500.16

*Contact Person(s) Name/Email/Phone Number for Questions:
*Emily Harrod Emily.Harrod@xxxxxxxx <mailto:Emily.Harrod@xxxxxxxx> 301-817-3882 operations support Xiangqian Wu Xiangqian.Wu@xxxxxxxx <mailto:Xiangqian.Wu@xxxxxxxx> 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
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