Topic: Midnight Blackbody Calibration Correction 11/15/03
Message Issued: October 24, 2003, 1810 UTC
Satellites Impacted: GOES-10 and GOES-12
Products Impacted: GOES-10 and GOES-12 Imager Infrared Data
Date/Time of Initial Impact: November 15, 2003 Local Midnight
*TENTATIVE*
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Details:
On or about November 15, 2003, the real-time on-orbit calibration of the
GOES Imagers will be improved by the addition of a routine to correct
for the detrimental effect of solar heating on the calibration around
local midnight. This effect has been observed since the launch of GOES-8
in 1994. When the Midnight Blackbody Calibration Correction (MBCC)
becomes operational, you will notice an increase in observed brightness
temperatures near local midnight, primarily in channel 2 (3.8 um), but
also to a lesser extent in the longer wavelength channels. The maximum
increases will be approximately 1K in channel 2 (typical change: 0.5K),
and much less in the other channels.
*** The date of the MBCC becoming operational (11/15/03) is tentative
pending further tests of the upgraded SPS units. ***
If there is a change in this date, we will send another notice to users.
Additional information can be found at
http://www.oso.noaa.gov/goes/goes-calibration/errors.htm and
http://www.oso.noaa.gov/goes/goes-calibration/blackbody/index.htm
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Contact Information:
Brian Hughes / Tom Renkevens
Satellite Services Division
NOAA/NESDIS/OSDPD
301-763-8051 x106 / x109
Brian.Hughes@xxxxxxxx
Thomas.Renkevens@xxxxxxxx
See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other