首页> 外文会议>Gravity, Geoid and Space Missions: GGSM 2004; International Association of Geodesy Symposia; vol.129 >Mass redistribution from global GPS timeseries and GRACE gravity fields: inversion issues
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Mass redistribution from global GPS timeseries and GRACE gravity fields: inversion issues

机译:全球GPS时间序列和GRACE重力场的质量再分配:反演问题

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Monitoring hydrological redistributions through their integrated gravitational effect is one of the primary aims of the GRACE mission. Yet it has been proposed that at larger scales this may be achieved independently by measuring and inverting the elastic loading associated with redistributing masses, e. g. with the IGS network. This is particularly interesting as long as GRACE monthly gravity solutions not (yet) match the targeted baseline accuracies at the lower degrees. In this contribution (1) we describe a joint inversion technique, (2) we introduce a physically motivated regularization that guarantees stable inversion results if only GPS data is used, (3) we apply this technique to GPS data provided by the IGS service covering recent years, and (4) finally we compute what the relative contribution of GRACE and GPS would be in a joint inversion.
机译:通过重力综合作用监测水文再分配是GRACE任务的主要目标之一。然而,已经提出,在较大规模上,这可以通过测量和求逆与重新分配质量(例如,重分布)相关的弹性载荷来独立地实现。 G。使用IGS网络。只要GRACE月重力解决方案(尚未)与较低的目标基准精度相匹配,这就特别有趣。在此贡献中,(1)我们描述了一种联合反演技术,(2)我们引入了一种物理动机的正则化,如果仅使用GPS数据,则可保证稳定的反演结果;(3)我们将此技术应用于IGS服务提供的GPS数据, (4)最后,我们计算了GRACE和GPS在联合反演中的相对贡献。

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