Differential emitter geolocation
Atechnique of locating a ground-based radio frequency (RF) emitter using receivers on a constellation of satellites is described and analyzed. A reference emitter near to the emitter of interest is required so that differences in carrier phase of the emitter of interest and the reference emitter can be measured. This technique is related to differential carrier phase techniques used in Global Positioning System (GPS) based high accuracy surveying applications.
Romero, Louis Anthony↗