Automatic detection of GPS SA base value for HFOM

Details Automatic detection of GPS SA base value for HFOM Automatic detection of GPS SA base value for HFOM

2005-07-29

2009-08-04

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07570205

ABSTRACT:
An apparatus and method for detecting the type of Selective Availability (SA) engine in a Global Positioning System (GPS) receiver. The apparatus reverse computes a User Equivalent Range Error (UERE) value and filters it. The filtered value is run through a hysteresis to determine the GPS engine type. The engine type determination is used to adjust values used by other systems.

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