Subject: NOAA-15, 16, 17, 18 and Metop-2/A, AVHRR,
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*Topic:*
   May monthly Level 1B visible calibration update and prelaunch 
calibration updates

*Date/Time(UTC) Message Issued:*
    7 May 2007, 1540 UTC

*Satellite(s) Involved:*
     NOAA-15, 16- 17, 18

*Instrument(s) Involved:*
     AVHRR

*Product(s) Involved/Affected:*
   Channels 1, 2, and 3a

*Date/Time(UTC) of Initial Implementation:*
    8 May 2007, Time TBD UTC - May VISCAL update and Version III 
prelaunch update
    13 March 2007, Time 1815 UTC -  update to use KLM Users' Guide 
prelaunch visible calibration parameters

*Details/Specifics of Change:*
This notice is to announce three events.
*1.)  On 8 May 2007, the normal AVHRR visible channel calibration 
parameter update will be made operational.  Following are the new values:*
_NOAA-18 AVHRR_
Ch_1_lo = 0.05284*count - 2.083, count<501.00
Ch_1_hi = 0.1575*count - 54.18, count>501.00

Ch_2_lo = 0.06160*count - 2.427, count<500.00
Ch_2_hi = 0.1848*count - 64.40, count>500.00

_ NOAA-17 AVHRR_
Ch_1_lo = 0.05548*count - 2.220, count<501.12
Ch_1_hi = 0.1629*count - 56.04, count>501.12

Ch_2_lo = 0.06680*count - 2.623, count<500.73
Ch_2_hi = 0.1988*count - 68.85, count>500.73

Ch_3_lo = 0.03221*count - 1.358, count<501.37
Ch_3_hi = 0.2258*count - 98.57, count>501.37

_NOAA-16 AVHRR_
Ch_1_lo = 0.05529*count - 2.132, count<498.96
Ch_1_hi = 0.1614*count - 54.85, count>498.96

Ch_2_lo = 0.06006*count - 2.269, count<500.16
Ch_2_hi = 0.1770*count - 60.74, count>500.16

These coefficients are intended to be optimal on May 26, in the middle 
of the two scheduled updates.
*
2.)  On 8 May 2007, prelaunch visible calibration parameter change to 
reflect Version III values*
At some point the prelaunch visible calibration parameters were 
inadvertently changed for NOAA-15, 16, 17, and 18.  On 13 March they 
were corrected to the KLM Users' Guide prelaunch values.  NOAA's 
Calibration Oversight Panel decided to update the prelaunch values using 
a new method of determination so that data for all satellites will be 
represented using Version 3 coefficients.  For detailed information go to
http://www.orbit.nesdis.noaa.gov/smcd/spb/fwu/solar_cal/AVHRR3_Prelaunch_CalCoeff.html
To obtain the new values from this website, click on "Prelaunch 
Calibration (Version III)"  in the list to the left of the text.  Please 
note that the original values were derived by different methods for 
different satellites: Version 1 was for NOAA-15/16/17; Version 2 for 
NOAA-18; and Version 3 for METOP-A.   Metop-A visible calibration 
parameters have not been updated since launch.

*3.)  On 13 March 2007 - Prelaunch visible Calibration update to KLM 
Users' Guide values*
Pre-launch calibration coefficients were changed to correct for an 
inadvertent mistake.  At some unidentified point, the prelaunch values 
had mistakenly been replaced with current updates after launch for 
NOAA-15, 16, 17, and 18.  On 13 March, around 1815 UTC, the following 
updates were implemented:
- Monthly visible calibration update for March
- NOAA-16 AMSU-A channel 4 Space view gross filtering limit from 17000 
to 32767
-  Prelaunch visible calibration parameter updated to values found in 
the KLM Users' Guide
The first orbits processed were:
N1S.GHRR.NL.D07072.S1521.E1707.B3336263.GC
N1S.HRPT.NL.D07072.S1708.E1717.B3336363.GC

N1S.HRPT.NN.D07072.S1657.E1702.B0933838.CF
N1S.LHRR.NN.D07072.S1603.E1609.B0933838.WI
N1S.GHRR.NN.D07072.S1257.E1452.B0933637.WI

NSS.GHRR.NM.D07072.S1449.E1635.B2451213.WI
NSS.HRPT.NM.D07072.S1818.E1833.B2451414.MO
NSS.LHRR.NM.D07072.S1928.E1938.B2451515.GC

*Contact Person(s) Name/Email/Phone Number for Questions:*
  Emily Harrod  Emily.Harrod@noaa.gov  301-817-3882
  Jerry Sullivan  Jerry.T.Sullivan@noaa.gov  301-763-8042

*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
     http://www.oso.noaa.gov/goes/index.htm - SOCC geostationary 
satellite status
     http://www.oso.noaa.gov/daily-news/index.asp 
<http://www.oso.noaa.gov/daily-news/index.htm> - SOCC morning reports
   
-- 
*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, NSOF, room 1460
* 4231 Suitland Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-817-3882
* fax 301-817-3902
* email Emily.Harrod@noaa.gov
*
*******************************************

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<b>Topic:</b>
<br>
&nbsp;&nbsp; May monthly Level 1B visible calibration update and prelaunch
calibration updates<br>
<br>
<b>Date/Time(UTC) Message Issued:</b>
<br>
&nbsp;&nbsp;&nbsp; 7 May 2007, 1540 UTC<br>
<br>
<b>Satellite(s) Involved:</b>
<br>
&nbsp;&nbsp;&nbsp;&nbsp; NOAA-15, 16- 17, 18<br>
<br>
<b>Instrument(s) Involved:</b>
<br>
&nbsp;&nbsp;&nbsp;&nbsp; AVHRR<br>
<br>
<b>Product(s) Involved/Affected:</b><br>
&nbsp;&nbsp; Channels 1, 2, and 3a<br>
<br>
<b>Date/Time(UTC) of Initial Implementation:</b>
<br>
&nbsp;&nbsp;&nbsp; 8 May 2007, Time TBD UTC - May VISCAL update and Version III
prelaunch update<br>
&nbsp;&nbsp;&nbsp; 13 March 2007, Time 1815 UTC -&nbsp; update to use KLM Users' Guide
prelaunch visible calibration parameters<br>
<br>
<b>Details/Specifics of Change:</b>
<br>
<font size="2"><span style="font-size: 11pt; font-family: Arial;"></span></font>This
notice is to announce three events.<br>
<b>1.)&nbsp; On 8 May 2007, the normal AVHRR visible channel calibration
parameter update will be made operational.&nbsp; Following are the new
values:</b><br>
<u>NOAA-18 AVHRR</u><br>
Ch_1_lo = 0.05284*count - 2.083, count&lt;501.00<br>
Ch_1_hi = 0.1575*count - 54.18, count&gt;501.00<br>
<br>
Ch_2_lo = 0.06160*count - 2.427, count&lt;500.00<br>
Ch_2_hi = 0.1848*count - 64.40, count&gt;500.00<br>
<br>
<u> NOAA-17 AVHRR</u><br>
Ch_1_lo = 0.05548*count - 2.220, count&lt;501.12<br>
Ch_1_hi = 0.1629*count - 56.04, count&gt;501.12<br>
<br>
Ch_2_lo = 0.06680*count - 2.623, count&lt;500.73<br>
Ch_2_hi = 0.1988*count - 68.85, count&gt;500.73<br>
<br>
Ch_3_lo = 0.03221*count - 1.358, count&lt;501.37<br>
Ch_3_hi = 0.2258*count - 98.57, count&gt;501.37<br>
<br>
<u>NOAA-16 AVHRR</u><br>
Ch_1_lo = 0.05529*count - 2.132, count&lt;498.96<br>
Ch_1_hi = 0.1614*count - 54.85, count&gt;498.96<br>
<br>
Ch_2_lo = 0.06006*count - 2.269, count&lt;500.16<br>
Ch_2_hi = 0.1770*count - 60.74, count&gt;500.16<br>
<br>
These coefficients are intended to be optimal on May 26, in the middle
of the two scheduled updates.<br>
<b><br>
2.)&nbsp; On 8 May 2007, prelaunch visible calibration parameter change to
reflect Version III values</b><br>
At some point the prelaunch visible calibration parameters were
inadvertently changed for NOAA-15, 16, 17, and 18.&nbsp; On 13 March they
were corrected to the KLM Users' Guide prelaunch values.&nbsp; NOAA's
Calibration Oversight Panel decided to update the prelaunch values
using a new method of determination so that data for all satellites
will be represented using Version 3 coefficients.&nbsp; For detailed
information go to<br>
<a class="moz-txt-link-freetext"
 href="http://www.orbit.nesdis.noaa.gov/smcd/spb/fwu/solar_cal/AVHRR3_Prelaunch_CalCoeff.html">http://www.orbit.nesdis.noaa.gov/smcd
To obtain the new values from this website, click on "Prelaunch
Calibration (Version III)"&nbsp; in the list to the left of the text.&nbsp;
Please note that the original values were derived by different methods
for
different satellites: Version 1 was for NOAA-15/16/17; Version 2 for
NOAA-18; and Version 3 for METOP-A.&nbsp;&nbsp; Metop-A visible calibration
parameters have not been updated since launch.<a
 class="moz-txt-link-freetext"
 href="http://www.orbit.nesdis.noaa.gov/smcd/spb/fwu/solar_cal/AVHRR3_Prelaunch_CalCoeff.html"></a><br>
<br>
<b>3.)&nbsp; On 13 March 2007 - Prelaunch visible Calibration update to KLM
Users' Guide values</b><br>
Pre-launch calibration coefficients were changed to correct for an
inadvertent mistake.&nbsp; At some unidentified point, the prelaunch values
had mistakenly been replaced with current updates after launch for
NOAA-15, 16, 17, and 18.&nbsp; On 13 March, around 1815 UTC, the following
updates were implemented:<br>
- Monthly visible calibration update for March<br>
- NOAA-16 AMSU-A channel 4 Space view gross filtering limit from 17000
to 32767 <br>
-&nbsp; Prelaunch visible calibration parameter updated to values found in
the KLM Users' Guide<br>
The first
orbits processed were: <br>
N1S.GHRR.NL.D07072.S1521.E1707.B3336263.GC<br>
N1S.HRPT.NL.D07072.S1708.E1717.B3336363.GC<br>
<br>
N1S.HRPT.NN.D07072.S1657.E1702.B0933838.CF<br>
N1S.LHRR.NN.D07072.S1603.E1609.B0933838.WI<br>
N1S.GHRR.NN.D07072.S1257.E1452.B0933637.WI<br>
<br>
NSS.GHRR.NM.D07072.S1449.E1635.B2451213.WI <br>
NSS.HRPT.NM.D07072.S1818.E1833.B2451414.MO <br>
NSS.LHRR.NM.D07072.S1928.E1938.B2451515.GC <br>
<br>
<b>Contact Person(s) Name/Email/Phone Number for Questions:</b>
<br>
&nbsp;
Emily Harrod&nbsp; <a class="moz-txt-link-abbreviated"
 href="mailto:nesdis.osdpd.ipd.cob.crew@noaa.gov">Emily.Harrod@noaa.gov</a>&nbsp;
301-817-3882<br>
&nbsp; Jerry Sullivan&nbsp; <a class="moz-txt-link-abbreviated"
 href="mailto:nesdis.osdpd.ipd.cob.crew@noaa.gov">Jerry.T.Sullivan@noaa.gov</a>&nbsp;
301-763-8042<br>
<br>
<b>Web site(s) that contain other relevant information (where
applicable):</b>
<br>
&nbsp;&nbsp;&nbsp;&nbsp; <a href="http://www.osdpd.noaa.gov/PSB/PPP/PPP.html">http://www.osdpd.noaa.gov/PSB/PPP/PPP.html</a>
- History of level 1B notices
<br>
&nbsp;&nbsp;&nbsp;&nbsp; <a href="http://www.ssd.noaa.gov/PS/SATS/messages.html">http://www.ssd.noaa.gov/PS/SATS/messages.html</a>
- All user notices
<br>
&nbsp;&nbsp;&nbsp;&nbsp; <a class="moz-txt-link-freetext"
 href="http://www.oso.noaa.gov/poes/index.htm">http://www.oso.noaa.gov/poes/index.htm</a>
- SOCC polar satellite status<br>
&nbsp; &nbsp;&nbsp;&nbsp;<a class="moz-txt-link-freetext"
 href="http://www.oso.noaa.gov/goes/index.htm">http://www.oso.noaa.gov/goes/index.htm</a>
- SOCC geostationary satellite status<br>
&nbsp;&nbsp;&nbsp;&nbsp; <a href="http://www.oso.noaa.gov/daily-news/index.htm">http://www.oso.noaa.gov/daily-news/index.asp</a>
- SOCC morning reports
<br>
&nbsp;
&nbsp;
<br>
-- <br>
*******************************************<br>
*<br>
* Emily D. Harrod<br>
* NOAA/NESDIS/OSDPD/IPD<br>
* Computer Operations Branch<br>
* Pre-Product Processing Group<br>
* E/SP11, NSOF, room 1460<br>
* 4231 Suitland Road<br>
* Suitland, Maryland 20746-4304<br>
* USA<br>
* voice 301-817-3882<br>
* fax 301-817-3902<br>
* email <a class="moz-txt-link-abbreviated"
 href="mailto:Emily.Harrod@noaa.gov">Emily.Harrod@noaa.gov</a><br>
*<br>
*******************************************
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