Langley DAAC Version Number:   LD_008_004_030_00_00_0_19990526


                            
  To all users of ERBE S-4G data obtained from the Langley DAAC:

At the time that the data were converted to HDF, it was incorrectly 
assumed that region 1 was located at 90 degrees N latitude and 180 
degrees W longitude rather than 90 degrees N latitude and 0 degrees 
longitude. Therefore software packages such as Collage and Spyglass will 
use this incorrect information from the HDF files for data retrieval. 
When the data are accessed by latitude and longitude, the incorrect 
regions are being retrieved (offset by 180 degrees). However 
accessing the data by region number will result in the proper location
being retrieved. The sample read software provided by the Langley DAAC
performs the conversion of longitudes to extract the correct region of 
interest.  
        
If you need more information concerning this problem, please contact 
us at the e-mail address enclosed.

EOSDIS Langley DAAC Science, Users and Data Services Office
NASA Langley Research Center
Mail Code 157D
2 South Wright Street
Hampton, Virginia 23681-2199
U.S.A.

E-mail:   support-asdc@earthdata.nasa.gov
Phone:    (757)864-8656
FAX:      (757)864-8807