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中文摘要：
采用月球重力场模型CEGM02和地形模型LRO—LTM02建立一个尽量与几何表面贴近的月球参考等势面，定义为月球大地水准面，其重力位Wo=2822327．8±16．2m2s-2。并解求与其等势的三轴水准椭球（长半轴1737462m，极扁率1／2579，赤道扁率1／6863，长半轴经度-76．8”）作为参考椭球。以该参考椭球为基准计算发现：正常重力场由赤道向两极减小约60×10。ms～，沿赤道部分变动约25×10-5ms；月球大地水准面高-325．9～389．1m。
英文摘要：
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 semi-major axis, polar flattening, equator flattening and longitude of semi-major 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 x 10-5 m/s2 from the equator to the poles, while the variation along the equator is about 25 x 10-5 m/s2. The selenoid undulations are in the range of -325.9 m to 389.1 m.
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