On Monday, February 22, 1999, at approximately 1550 GMT, 
NOAA engineers will change the bias mode used in the 
GOES-10 Sounder calibration process, to help minimize drift 
in the bias factors (intercepts) between space looks. 
Bias Mode 2 will allow the bias to be calculated more frequently,
and estimated based on its correlation with the variation 
in optics temperature. During certain parts of the day 
when optics temperatures are changing rapidly, this mode 
provides a better correlation between bias variation and 
optics temperature, and will ultimately provide for a
higher-quality sounding.
Peter J. Celone
NOAA/NESDIS/Office of Satellite Operations
Rm 0151 FB4
301-457-5180 x 167