Service Interruption

Antenna Temperatures

The inputs to the Pathfinder processing are the SSM/I antenna temperature data sets produced by Remote Sensing Systems. The major functions of the Pathfinder processing are to decode the input data using Revision 1 of the Decode software, to correct errors and improve the utility of the data, and store the results in the Hierarchical Data Format (HDF). The corrections include geolocation, along scan pixel adjustments, updated surface type codes, and flagging of mislocated and out of bound values. For further information, including detailed descriptions of the HDF data files, see our pages on the SSM/I Pathfinder Project.

The quality controlled Pathfinder data include daily antenna temperature browse images for the ascending and descending orbits of the 19 and 85 Ghz horizontal channels, antenna temperatures in each channel in swath (native) projection, pixel latitudes, longitudes and surface types, spacecraft ephemeris information and calibration information. The data are stored on a near-line Write Once Read Many (WORM) juke box in HDF, and each day is a separate file. A day begins with data from the first B scan after 00 Greenwich Mean Time and ends with the last B scan time before 23:59:59 GMT. The data are transferred to 8-mm tapes in monthly increments for distribution. Information is also provided with each distribution on how to read the HDF files and how to calculate brightness temperatures from antenna temperatures.

(START DATE: 1987-08-01 STOP DATE: 1988-12-31)


Wentz, Frank J. 1992. Final Report Production OF SSM/I Data Sets, RSS Technical Report 090192. Remote Sensing Systems, 1101 College Avenue, Suite 220, Santa Rosa, CA 95404. September 1, 1992.

Hollinger, J. P. 1989. DMSP Special Sensor Microwave/Imager Calibration/Validation, Final Report Volume 1. Naval Research Laboratory, Washington DC 20375-5000. July 20, 1989.

Spangler, David J. 1992. Comparison of FNOC SSM/I Radiances and Geolocation with those of Wentz and Wetnet, Scientific Technology Incorporated Note, Code 7211. Naval Research Laboratory, Washington DC 20375-5000. November 30,1992.