Invited by State Key Laboratory of Geodesy and Earth’s Dynamics (SKLGED), APM, prof. Jean-Pierre Barriot from Tahiti geodetic Observatory, France and prof. Yan Jianguo from Wuhan University visited APM and gave academic reports respectively titled “An overview of the research in geodesy done at the Geodesy Observatory of Tahiti: SLR, GNSS, Tide gauges and planetary Sciences” and “Research of the moon's gravitational field and internal structure” on December 18.

Prof. Jean Pierre barriot introduced the observation data of DORIS, GNSS, SLR, VLBI, tide gauge and gravimeter of the tracking station of Tahiti Observatory in detail and the research results in geodynamics, earthquake, atmosphere and other aspects, and negotiated the cooperation and exchange contents between Zhang fangzhao and SKLGED, IGG.     

Prof. Yan Jianguo introduced the research progress of the planetary science team of the Key Laboratory of Remote Sensing of Wuhan University in the field of lunar gravity and its internal structure, mainly using the data of Chang'e-1 and multi-source observation to calculate the lunar gravity field, and introduced the deep space probe precise orbit determination and gravity field calculation software WUDOGS developed by their team, which has been strictly tested and verified by experiments and its has been put into application.

The two reports are closely related to the research direction of multiple discipline groups in APM.