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1992年10月23日,美国航天飞机在太空发射了一颗鲜为人知的测地卫星,名叫激光地球动力学卫星。其实,它是人类发射的第2颗同类卫星,1976年5月4日美国曾发射过一颗激光地球动力学卫星。 测地英豪 测地卫星是专门用于大地测量的人造地球卫星,可测定地面点位坐标、地球形体和地球引力场参数,属卫星测地系统的空间部分,可作为地面观测设备的视测目标或定位基准。其他类型的卫星也能用于测地研究,如GPS,但精确性不够,而测地卫星有明显的专长:①提供了在全球范围内进行大地联测的全球统一地心坐标系;②卫星轨道运动
On October 23, 1992, the U.S. space shuttle launched a little-known geodetic satellite in space called the Laser Geodynamics Satellite. In fact, it is the second satellite launched by mankind. On May 4, 1976, the United States launched a laser geodynamics satellite. Geodetic British geodetic satellite is designed for geodesy artificial satellite, can determine the coordinates of the ground point, the earth’s gravity and gravitational field parameters, satellite geodetic system is a space part of the ground observation equipment can be used as the visual target Or positioning reference. Other types of satellites can also be used for geodetic research, such as GPS, but their accuracy is inadequate. However, geodetic satellites have obvious expertise: ① providing a globally unified geocentric coordinate system for geodetic surveying around the world; ② satellites Orbital motion