Recently, National Satellite Ocean Application Service successfully organized a satellite-to-ground data transmission link docking test for ocean salinity detection satellite at Hainan Ocean Satellite Ground Receiving Station (Lingshui Station). Participating research units in the test included Major Special Engineering Center of the State Administration of Science, Technology and Industry for National Defense, the Remote Sensing General Department of the Fifth Academy of China Aerospace Science and Technology Corporation, Xi'an Branch of the Fifth Academy of China Aerospace Science and Technology Corporation, Shaanxi Aerospace Technology Application Research Institute Co., Ltd, and TongFang Saiweixun Information Technology Co., Ltd., etc.

This test was necessary to ensure the compatibility and correctness of the satellite-to-ground link before the launch of the ocean salinity detection satellite. The test was divided into wired and wireless parts. The wired docking test was conducted using the 12-meter antenna and the data receiving room of Hainan Ocean Satellite Ground Receiving Station, while the wireless docking test was conducted at the top of Bengtou Ling Mountain in Wenluo Town, Lingshui County, and the receiving room. The test contents included: working frequency check, spectrum check, data format compatibility check, wired symbol error rate check, coding gain test, antenna polarimetric rotation consistency check, capture capability check ,wireless symbol error rate check, etc.