GIST GOES-7 Visible Imagery
     
     
     1.0  General Description
     
          The Geostationary Operational Environmental Satellite (GOES-7)
     Visible imagery is one of several image datasets provided in the GEWEX
     Continental-scale International Project (GCIP) Integrated Systems Test
     (GIST). The GOES-7 Visible imagery covers the GIST domain
     (approximately 31-40 degrees N, 91-107 degrees W) at 2 km resolution. 
     The GOES-7 Visible imagery  contains daily imagery for the GIST time
     period (01 April 1994 through 31 August 1994). 
     
     2.0  Detailed Data Description
     
          The GOES-7 Visible imagery were collected daily for the period
     01 April 1994 through 31 August 1994. From this dataset a representative
     daily image was selected at 2101 UTC or nearest time available to
     coincide with the time of maximum convection. The imagery was archived
     in McIDAS-X format and the selected daily images were translated to
     Graphical Interchange Format (GIF). These images were mapped and
     enhanced using a standard grey scale.
     
          These GIF images can be viewed using any standard GIF display
     software package. However, any additional detailed information from the
     original files (i.e., brightness temperatures, navigation, etc.) are not
     available from the GIF image, but can be obtained from the actual data
     available from the UCAR Office of Field Project Support (UCAR/OFPS). 
     
     2.1  Detailed Format Description
     
          General information on GIF files, structure and format are provided
     in the References.
     
     2.2  Data Remarks
     
          All daily images are for 2101 UTC or closest available time.
     Imagery was unavailable for the following dates: 940717, 940723 through
     940726, 940730, 940731, 940811 through 940818.
     
     3.0  Quality Control Processing
     
          No additional quality control or re-navigation was performed on the
     imagery by the UCAR/OFPS. OFPS did overlay the map and enhance the
     imagery before conversion to GIF files.
     
     4.0  References
     
     Kay: Graphics File Formats, 2/E.  ISBN: 0-07-034025-0, McGraw Hill.
     
     Luse, M: Bitmapped Graphics Programming in C++. ISBN: 0-201-
          63209-8, Addison-Wesley.