NASA Earth Science Data Systems (ESDS) recipient



GHRC Satellite Coincidence Search Engine

The Satellite Coincidence Search Engine provides the WWW user with the capability to determine when satellites were or will be over a specified geographic area or within some distance of each other.

The Coincidence Search Engine may be used to search for times when up to four satellites were over or within the same geographic area simultaneously. Searches may be constrained by time, geographic area, and/or distance between the satellites. The output consists of a sequence of text lines listing the date, time, satellite name, and latitude and longitude.

The program uses an archived database of element set data to calculate the orbits, using a model supplied by the Colorado Center for Astrodynamic Research (CCAR). Orbits may be extrapolated for future times, but the accuracy of the orbit decreases as the temporal distance from the last element set increases.

Service Provider

Service Organization: NASA/MSFC/GHRC > Global Hydrology Resource Center, Marshall Space Flight Center, NASA
Service Organization URL:
Phone: (256) 961-7890
Fax: (256) 961-7723

Global Hydrology and Climate Center
320 Sparkman Drive
Huntsville, AL 35805

For additional information, send e-mail to or call +1-256-824-6868.


For additional information, e-mail or call +1-256-824-6868.
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