Abstract
A simple method of passive localization is proposed in this article. The proposed approach is located a on the ground or in the air stationary target using the satellites in different signal Doppler frequencies. After the localization principle and algorithm are introduced, the relationship between the positioning precision and the measurement precision of Doppler changing rate, carrier wave frequency, height assumption error, orbit measurement of satellite are analyzed, and then some simulation results are given. Our proposed positioning method can achieve the positioning precision of 5 km within the scope of the radius of 200 km, which is much better than the traditional method based on direction finding on the positioning precision of a few tens of kilometers.
Highlights
Passive location technologies for non-cooperative radiation sources and interference sources are of great value in the field of electronic warfare.[1,2] As compared with the ground and airborne observation platforms, satellite platform has its own advantages in information acquisition
A single satellite passive location method based on instantaneous frequency measurement was proposed,[4,5] which obtains the optimal location using the grid search technique solution
A passive localization method based on a single satellite Doppler frequency measurement was presented in the study of Li and Zhou.[6]
Summary
Passive location technologies for non-cooperative radiation sources and interference sources are of great value in the field of electronic warfare.[1,2] As compared with the ground and airborne observation platforms, satellite platform has its own advantages in information acquisition. Equation (9) contains the position parameters of the target radiation source, and the coordinates of the target can be obtained by measuring the Doppler change rate at several different time slots. This is the basic principle of single star passive location based on Doppler rate of change. Analysis of equation (8)—the factors that affect the accuracy of target location of ground radiation sources can be obtained, mainly including the following: Doppler change rate measurement error, carrier frequency measurement error, namely, number of frequency measurement times, satellite orbit determination error (including relative position accuracy and absolute position accuracy), altitude hypothesis error, and radiation source location.
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