Dr Fengchun Shu (Shanghai Astronomical Observatory)
Using the same frequency standard, a high-precision phase delay can be obtained in a connected element interferometry (CEI) system. Beidou GEO navigation satellite C02 is tracked from a CEI observations, where the CEI of the two stations at hangtiancheng and shahe linked by a phase stabilization system is built by Beijing Aerospace Control Center (BACC). And Beidou GEO navigation satellite C03 is applied as calibration to conduct a differential measurement. After introducing group-delay-aided phase delay, the measure noise of the interferometry delay is about 9.4ps (root mean square of the linear fitting residuals in each 300 seconds). Following a differential observation as "2 hours calibration-13 hours tracking -2 hours calibration", the accuracy of the interferometry delay for C02 is better than 0.4ns. Results show that using a GEO satellite with high-accuracy ephemeris as the calibration, a high-accuracy interferometry can be achieved for the target satellite using small aperture antennas.
Dr Tianpeng REN (Beijing Aerospace Control Center)
Dr Fengchun Shu (Shanghai Astronomical Observatory) Dr Geshi TANG (Beijing Aerospace Control Center) Dr Jing SUN (Beijing Aerospace Control Center) Mr Lue CHEN (Beijing Aerospace Control Center) Mr Mei WANG (Beijing Aerospace Control Center) Mr Songtao HAN (National Key Laboratory of Science and Technology on Aerospace Flight Dynamics,Beijing Aerospace Control Center) Mr Zhenwei SHI (Beijing University of Posts and Telecommunications)