Texas Instruments Introduces New Satplan® Software For Global Positioning System

Texas Instruments has announced a new addition to its TI 4100 NAVSTAR navigator product line, an enhancement that makes the Global Positioning System (GPS) constellation more productive as a navigation/positioning tool.

Called SATPLAN, the new software product provides specific satellite visibility times and position dilution of precision (PDOP) information, according to John Applegate, marketing manager for TI's Global Positioning System. PDOP helps the user select the best time at which the satellites are in a geometry that will produce a more accurate position.

SATPLAN selects the four best satellites available to the user and provides information on precise GPS satellite rise and set times, satellite azimuth and elevation, satellite visibility profile, and the recommended navigation mode.

"The benefit to the user," Mr.

Applegate stated, "is that SATPLAN displays and prints the information in tabular and graphic form so that a detailed schedule of satellite availability can be quickly prepared, including an analysis of the most efficient times for GPS use in each location and on each date desired." Using the TI Color Professional or Portable Professional Computer, with 256K RAM and 8087 numerical co-processor, the easy-to-use SATPLAN complements the TI 4100 GPS receiver. SATPLAN almanac data can be taken directly from the TI 4100 receiver's display or can be updated from government or user sources. Almanac nomenclature is the same as that used by the TI 4100.

For free literature fully describing the new TI 4100 NAVSTAR navigator product line, Circle 14 on Reader Service Card

Maritime Reporter Magazine, page 40,  Mar 1985

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