﻿ 运动平台上时差变化率的相差检测

运动平台上时差变化率的相差检测Detection for Time Difference Rate by Measuring Phase Difference on Motion Platform

A new method for detection of time difference rate using short baseline array on airborne platform is presented by measuring the phase shift in multichannel way. The time difference expression based on phase difference measurement can be solved according to phase difference and time difference location equation. Further, the time difference rate based on phase difference measurement can be derived by differential and making use of the functional relationship between phase shift and Doppler shift. On the other hand, the time difference rate based on frequency difference measurement can be obtained if we do the differential analyzer for direction finding formula. The analog calculation validates that derived formula of time difference rate are all correct. The elementary error analysis shows that the measurement accuracy of time difference rate based on phase difference or frequency difference is higher for having the light velocity whose order of magnitude is enormous in denominator of formula. The major contribution in this paper is that the time difference rate on airborne platform can be in real time detected by phase interferometry with short-baseline array.

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