基于地形精化的金星重力场模型VGM2013

发布时间：2018-06-05 05:23

本文选题：金星 + 重力场精化　；参考：《地球物理学报》2014年08期

【摘要】：高精度金星重力场的获取,是金星探测的重要内容.本文利用最新的金星地形和重力模型,通过高通滤波后的残差地形(RTM)并在考虑均衡改正的情况下改进了重力的短波成分,最终提出了一个新的金星重力模型VGM2013,该模型赤道分辨率达10 km量级,大大高于现有的金星重力场模型,最终结果是金星表面重力加速度和重力扰动.研究中同时发现金星在Airy-Heiskanen均衡模型下的全球最优补偿深度为30 km,金星地壳的密度可能小于当前认为的2700~2900 k·m.VGM2013模型的结果可为将来的金星探测器定轨和着陆导航提供参考,作为重力计算的先验模型.但由于该模型没有包含短波重力观测信息,不建议直接用于更小尺度的地质和地球物理解释.
[Abstract]:The acquisition of high-precision Venus gravity field is an important part of Venus exploration. In this paper, using the latest Venus terrain and gravity model, the short-wave component of gravity is improved by using the high-pass filtered residual terrain (RTM) and considering the equalization correction. Finally, a new Venus gravity model, VGM2013, is proposed. The equatorial resolution of the model is 10 km, which is much higher than that of the existing Venus gravity field model. The final result is the surface gravity acceleration and gravity disturbance of Venus. It is also found that the global optimal compensation depth of Venus under the Airy-Heiskanen equilibrium model is 30 km, and the density of the crust of Venus may be less than that of the 2700,2900k m.VGM2013 model, which can provide a reference for the future orbit determination and landing navigation of the Venus probe. As a transcendental model for gravity calculation. However, since the model does not contain short-wave gravity observation information, it is not recommended that the model be directly applied to geological and geophysical interpretation on a smaller scale.
【作者单位】：武汉大学中国南极测绘研究中心;武汉大学测绘遥感信息工程国家重点实验室;
【基金】：国家自然科学基金项目(41174019,41374024) 湖北省自然科学基金重点创新群体项目(2012FFA041) 武汉大学中央高校基本科研业务费专项资金项目(122009,2042014kf0051) 山东省基础地理信息与数字化技术重点实验室开放基金项目(SD080705)资助
【分类号】：P185.2

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