GLOBAL POSITIONING SYSTEM DIGITAL SPHERICAL COVERAGE
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2001-Dec-27
PROBLEM SOLVED Global Positioning System (GPS) receivers operating on an airplane need to be able to receive satellite signals in all tlight modes. Spherical tracking of GPS satellites by a GPS receiver on an airplane is currently accomplished by multi- ple antennae feeding into coupler circuits or special antenna. switching networks. GPS receiver operation without mul- tiple antennae is possible but signal acquisition is lost dur- ing maneuvering due to antennae not having full spherical coverage because of signal blockage by the airframe.