Research And Realization Of Linka Ge Between Interferometry Equipment And Data Processing

Interferometry technology with the characteristics of high angle measurement accuracy and passive measurement was proposed from the radio astronomy.It is gradually applied in the non-cooperative measurement.Different from cooperative measurement with designed tracking time,non-cooperative measurement has the characteristics of tentativeness,exploration,heavy workload.Therefore,the efficiency of data processing and research can be greatly improved by constructing an interferometric measurement system integrating control,acquisition,storage,processing and other modules with linkage control.In the work,linkage research between the interferometry system and data processing is carried out based on a short-baseline interferometry system.The short-baseline interferometry system is implemented and tested in Beijing;GEO and other satellite signals are received by the interferometry system,and the interferometric processing process is established,analyzed and verified;The accuracy of the short-baseline interferometry system is analysed and validated.The main work and achievements are as follows:1.Linking the hardware module of the short-baseline interferometry system with the software,the linkage control between the hardware system and control software is realized,which greatly improve the efficiency of data processing and research.The upper computer software is designed and applied to control the hardware modules.The software and hardware modules work together,which guarantees a short baseline interferometry system with good stability and high efficiency;2.Based on the characteristics of short baseline interferometry system,the process of differential interferometric phase processing is proposed.Constraints such as the target position,accuracy of a priori angle,the length of the baseline,the direction of the baseline are set up.The simulation of the relationship among the baseline length,the baseline direction and the longitude position of the satellite is conducted,which establishes a theoretical basis for the differential interferometry with interferometric phase.3.A system accuracy assessment method is established basing on differential interferometry as "precision-ephemeric satellite-targetprecision-ephemeric satellite".The accuracy of differential interferometric phase is about 0.1-0.2 rad for S-band GEO satellites.Using this method,the differential interferometry method of "calibration tower-target-calibration tower" is cleared,which provides a basis for error calibration of the tower position.In summary,this paper achieves the linkage processing between software and hardware by a short-baseline interferometry system.As shown,the linkage processing improves the efficiency of the short baseline interferometry system.The model provides a priori input for solving problem of interferometric phase ambiguity;The measured accuracy of differential interference phase can reach 0.1-0.2rad with double S-band GEO satellites.This work provides a basis for the system operation and differential observation in the aspect of short baseline interferometry.