A NEW SELENOID MODEL AND REFERENCE TRIAXIAL LEVEL
ELLIPSOID
1）School of Geodesy and Geomatics, Wuhan University, Wuhan 430079
Abstract 〗A new selenoid (lunar geoid) is derived using the lunar gravity model CEGM02 and topography model LRO_LTM02, which approximates the physical surface as closely as possible. The estimated gravity potential value of this selenoid is 2 822 327.8±16.2 m2/s2, denoted as W0 in usual. A triaxial level ellipsoid whose surface gravity potential equals W0 above is calculated and used as a reference ellipsoid, and its semimajor axis, polar flattening, equator flattening and longitude of semimajor axis are 1 737 462 m, 1/2 579, 1/6 863 and -76.8 ″, respectively. Based on this reference ellipsoid, the gravity decreases about 60×10-5ms-2 from the equator to the poles, while the variation along the equator is about 25×10-5ms-2. The selenoid undulations are in the range of -325.9 m to 389.1 m.
Key words ：
月球大地水准面
参考三轴水准椭球
月球重力场
月球地形
基准
Received: 05 November 2012
Published: 16 August 2013
Cite this article:
Feng Hai,Li Jiancheng,Li Dawei et al. A NEW SELENOID MODEL AND REFERENCE TRIAXIAL LEVEL
ELLIPSOID[J]. jgg, 2013, 33(4): 133-136.
Feng Hai,Li Jiancheng,Li Dawei et al. A NEW SELENOID MODEL AND REFERENCE TRIAXIAL LEVEL
ELLIPSOID[J]. jgg, 2013, 33(4): 133-136.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2013/V33/I4/133
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