NASA NTRS · 19940022789
A GPS coverage model
Abstract
The results of several case studies using the Global Positioning System coverage model developed at Ohio University are summarized. Presented are results pertaining to outage area, outage dynamics, and availability. Input parameters to the model include the satellite orbit data, service area of interest, geometry requirements, and horizon and antenna mask angles. It is shown for precision-landing Category 1 requirements that the planned GPS 21 Primary Satellite Constellation produces significant outage area and unavailability. It is also shown that a decrease in the user equivalent range error dramatically decreases outage area and improves the service availability.
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Skidmore, Trent A.. 1994-02-01. A GPS coverage model. https://ntrs.nasa.gov/citations/19940022789
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