Lemoine Frank G, Goossens Sander, Sabaka Terence J, Nicholas Joseph B, Mazarico Erwan, Rowlands David D, Loomis Bryant D, Chinn Douglas S, Neumann Gregory A, Smith David E, Zuber Maria T
NASA Goddard Space Flight Center Greenbelt, Maryland, USA.
NASA Goddard Space Flight Center Greenbelt, Maryland, USA ; CRESST, University of Maryland, Baltimore County Baltimore, Maryland, USA.
Geophys Res Lett. 2014 May 28;41(10):3382-3389. doi: 10.1002/2014GL060027. Epub 2014 May 29.
We have derived a gravity field solution in spherical harmonics to degree and order 900, GRGM900C, from the tracking data of the Gravity Recovery and Interior Laboratory (GRAIL) Primary (1 March to 29 May 2012) and Extended Missions (30 August to 14 December 2012). A power law constraint of 3.6 ×10/ was applied only for degree greater than 600. The model produces global correlations of gravity, and gravity predicted from lunar topography of ≥ 0.98 through degree 638. The model's degree strength varies from a minimum of 575-675 over the central nearside and farside to 900 over the polar regions. The model fits the Extended Mission Ka-Band Range Rate data through 17 November 2012 at 0.13 μm/s RMS, whereas the last month of Ka-Band Range-Rate data obtained from altitudes of 2-10 km fit at 0.98 μm/s RMS, indicating that there is still signal inherent in the tracking data beyond degree 900.
我们利用重力恢复与内部实验室（GRAIL）主要任务（2012年3月1日至5月29日）和扩展任务（2012年8月30日至12月14日）的跟踪数据，推导出了一个到900阶次的球谐重力场解GRGM900C。仅对大于600阶的情况应用了3.6×10/的幂律约束。该模型产生的全球重力相关性以及由月球地形预测的重力在638阶以内≥0.98。该模型的阶次强度从近月面和远月面中心的最小值575 - 675变化到极地地区的900。该模型以0.13μm/s的均方根误差拟合了截至2012年11月17日的扩展任务Ka波段距离变化率数据，而从2 - 10千米高度获得的最后一个月的Ka波段距离变化率数据的拟合均方根误差为0.98μm/s，这表明在900阶以上的跟踪数据中仍存在固有信号。
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