[nws-changes] 20090414: calibration update

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: [nws-changes] 20090414: calibration update
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Tue, 14 Apr 2009 07:32:42 -0600

*Topic:
*Visible calibration update for month of  April 2009

*Date/Time(UTC) Message Issued:*
 13 April 2009, 2045 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:*
14 April 2009, Time TBD UTC

*Details/Specifics of Change:*

The following update of the calibration coefficients are recommended for 
Metop-A/2, NOAA-18/17/16 on April 14. These coefficients are intended to be 
optimal on April 28, in the middle of the two scheduled updates.

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

 Ch_1_lo = 0.05327*count -  2.154, count<501.01
 Ch_1_hi =  0.1574*count -  54.33, count>501.01


 Ch_2_lo = 0.06343*count -  2.521, count<500.42
 Ch_2_hi =  0.1884*count -  65.05, count>500.42


 Ch_3_lo = 0.03197*count -  1.314, count<501.94
 Ch_3_hi =  0.2220*count -  96.71, count>501.94

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

 Ch_1_lo = 0.05357*count -  2.112, count<501.54
 Ch_1_hi =  0.1597*count -  54.93, count>501.54

 Ch_2_lo = 0.06128*count -  2.414, count<500.40
 Ch_2_hi =  0.1839*count -  64.06, count>500.40


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

 Ch_1_lo = 0.05629*count -  2.253, count<501.12
 Ch_1_hi =  0.1653*count -  56.85, count>501.12

 Ch_2_lo = 0.06777*count -  2.661, count<500.73
 Ch_2_hi =  0.2017*count -  69.84, count>500.73

 Ch_3_lo = 0.03298*count -  1.390, count<501.37
 Ch_3_hi =  0.2312*count - 100.93, count>501.37

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

 Ch_1_lo = 0.05700*count -  2.198, count<498.96
 Ch_1_hi =  0.1664*count -  56.54, count>498.96

 Ch_2_lo = 0.06232*count -  2.354, count<500.16
 Ch_2_hi =  0.1836*count -  63.02, count>500.16

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

*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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