Back

NOAA-16,17,and 18, AVHRR Instrument, Viscal Updates, Implementation Date 14 February 2006- Issued: Date issued 14 February 2006; time issued 15:40 UTC

*Topic*:
Update to visible calibration coefficients

*Date/Time(UTC) Message Issued:*
14 February 2006 10:40 UTC

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

*Instrument(s) Involved:*
AVHRR.

*Product(s) Involved/Affected:*
All products using channels 1, and 2 AVHRR instrument on NOAA-16

All products using channels 1,2, and 3 AVHRR instrument on NOAA-17

All products using 1, and 2 AVHRR instrument for NOAA-18

*Date/Time(UTC) of Initial Implementation:*
14 February 2006 1600 UTC

*Details/Specifics of Change:*

On 14 February @ 1600 UTC updates to the AVHRR Visible calibration coefficients and HIRS Analog coefficients were implemented.

*The first orbits to be process with the updates are as follows:
*

**NSS.HRPT.NL.D06045.S1608.E1621.B2782929.GC
NSS.GHRR.NL.D06045.S1239.E1435.B2782728.GC

NSS.HRPT.NM.D06045.S1651.E1704.B1893535.WI
NSS.GHRR.NM.D06045.S1504.E1651.B1893435.WI

NSS.HRPT.NN.D06045.S1748.E1803.B0381111.WI
NSS.GHRR.NN.D06045.S1436.E1632.B0380910.WI
NSS.LHRR.NN.D06045.S1539.E1548.B0380909.WI *
*

* The following update of the AVHRR calibration coefficients are implemented for:

NOAA-16 AVHRR

Ch_1_lo = 0.05430*count - 2.094, count<498.96
Ch_1_hi = 0.1585*count - 53.87, count>498.96

Ch_2_lo = 0.05871*count - 2.218, count<500.16
Ch_2_hi = 0.1730*count - 59.37, count>500.16

NOAA-17 AVHRR

Ch_1_lo = 0.05507*count - 2.204, count<501.12
Ch_1_hi = 0.1617*count - 55.62, count>501.12

Ch_2_lo = 0.06667*count - 2.618, count<500.73
Ch_2_hi = 0.1985*count - 68.72, count>500.73

Ch_3_lo = 0.03192*count - 1.345, count<501.37
Ch_3_hi = 0.2237*count - 97.68, count>501.37

NOAA-18 AVHRR

Ch_1_lo = 0.05341*count - 2.106, count<500.54
Ch_1_hi = 0.1592*count - 54.76, count>500.54

Ch_2_lo = 0.06202*count - 2.444, count<500.40
Ch_2_hi = 0.1861*count - 64.84, count>500.40

on February 14. These coefficients are intended to be optimal on February 28.*

*Please note that the following changes were also implemented along with the viscal implementation .

As part of the Viscal update for the month of February, NOAA will implement the instrument scientist's recommendations to correct NOAA-N/18 and L/16 analog telemetry coefficients as indicated below. The user community will be provided test 1b data beginning on Wednesday, February 1 (look for second notice). Please review the changes and provide your concerns or requests no later than February 10.
*NOAA-N/18 analog telemetry coefficients changes:*
The following temperatures are now reported in Kelvin rather than Celsius:
Radiation Temperature
Baseplate Temperature
Electronics Temperature
Patch Temperature
Scan Motor Temperature
Filter Wheel Motor Temperature

They were corrected by converting the following 1B file Parameters from Celsius to Kelvin:
Radiator Temperature Coefficient 1
Baseplate Temperature Coefficient 1
Electronics Temperature Coefficient 1
Patch Temperature Coefficient 1
Scan Motor Temperature Coefficient 1
Filter Wheel Motor Temperature Coefficient 1
*
NOAA-L/16 1B changes were as follows: *
Scan Motor Current Coefficient 2 was changed from .4000000E+01 to .4000000E+00.
Patch Controller Power Coefficient 2 (linear) value .3232320E-02 which was reported as 0 was moved to the Patch Controller Power Coefficient 3 (quadratic) value.

*
*Contact Person(s) Name/Email/Phone Number for Questions:* - Xiangqian Wu, Ph. D.
Physical Scientist, NOAA/NESDIS/ORA
E/RA2, Office 7214, 5200 Auth Rd.
Camp Springs, MD 20746-4304
Phone: 301-763-8136 ext. 138
FAX: 301-763-8580
Xiangqian.Wu@noaa.gov

CAO, CHANGYONG Ph.D.(HIRS INSTRUMENT) NESDIS HQTR Route: E/RA2 LDG: WWBG RM: 712 5200 AUTH RD CAMP SPRINGS MD 20746-4304
PH: (301)763-8136 x196 FAX:(301)763-8580
changyong.cao@noaa.gov

Cecil A. Paris
Physical Scientist
301-457-5247 ext 129
cecil.paris@noaa.gov

*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/poesstatus/ - SOCC polar satellites status
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports

--
*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Product Systems Branch
* Pre-Product Processing Group
* E/SP13, Federal Building #4, room 0318
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-457-5247 ext 117
* fax 301-457-5199
* email Emily.Harrod@noaa.gov
*
*******************************************


ppp@nesdis.noaa.gov

Back