Abstract:According to mathematical definition, airborne single-station ranging only based on Doppler shift measurement can be realized by the approximation to Doppler changing rate equation. On this basis, the expressing of average for Doppler changing rate in a time interval is researched. On condition that airborne measuring station is in uniform linear flight motion, the analysis shows that the average value of Doppler changing rate is directly related to the product of tangential velocity at two terminals and is inversely relative to radial distance at end position in a time interval. And the analog calculation verifies that the better ranging result can be obtained only from this average expression. As contrasted to existing method, the ranging method derived in this text requires neither to detect Doppler changing rate directly nor to be used with other location method. At the same time, according to research effort in documentation, the airborne single-station ranging can be realized only based on frequency measurement after detecting and obtaining the measured signal center frequency. The result in this text has laid an application foundation for directly utilizing Doppler principle to realize accurate ranging.
