GIST GOES-7 Water Vapor Imagery 1.0 General Description The Geostationary Operational Environmental Satellite (GOES-7) 6.7 micron Infrared (Water Vapor) imagery is one of several image datasets provided in the GEWEX Continental-scale International Project (GCIP) Integrated Systems Test (GIST). The GOES-7 Water Vapor imagery covers the central and western United States at 8 km resolution. The GOES-7 Water Vapor imagery contains daily imagery for the GIST time period (01 April 1994 through 31 August 1994). 2.0 Detailed Data Description The GOES-7 Water Vapor imagery was collected for the period 01 April 1994 through 31 August 1994. From this dataset a representative daily image was selected at 1201 UTC whenever possible, to coincide with the National Meteorological Center ETA Model Weather Map imagery (1200 UTC). 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 of brightness temperatures. A "grey scale" legend has been included on each image. 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 1201 UTC or closest available time. Imagery was unavailable for the following dates: 940724 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.