Earth Rotation Parameters from Very Long Baseline Interferometry and Ringlaser Observables
Earth Rotation Parameters from Very Long Baseline Interferometry and Ringlaser Observables
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来自甚长基线干涉测量和环形激光可观测数据的地球自转参数
DOI：
10.1142/9789812836182_0010
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
A. Velikoseltsev
中科院分区：
文献类型：
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作者：
P. J. Mendes Cerveira;H. Spicakova;H. Schuh;T. Klügel;K. U. Schreiber;A. Velikoseltsev
本章的主要目标是为甚长基线干涉测量（VLBI）和环形激光观测的结合提供数学形式。首先，我们推导了简化的 VLBI 观测方程的偏项，w.r.t.章动、恒星时、世界时、日长和大地极移参数。尽管如此，仍提出了与 VLBI 参数化兼容的环形激光技术的部分内容。这两种技术的结合似乎是原始的，因为环形激光技术可能在不久的将来有效地有助于确定日间地球自转变化，因为它对瞬时地球自转矢量的敏感性及其近实时数据采集的独特性。我们描述了两种类型可观测量的理论兼容性。
The primary goal of this chapter is to provide the mathematical formalism for the combination of Very Long Baseline Interferometry (VLBI) and ringlaser observations. First, we derived the partials of a simplified VLBI observation equation, w.r.t. nutation, sidereal time, universal time, length of day, and geodetic polar motion parameters. All the same, the partials for the ringlaser technique, compatible to VLBI parameterization, are presented. A combination of both techniques seems primordial, as the ringlaser technology may in the near future contribute effectively to the determination of subdiurnal Earth rotation variations, given its uniqueness in sensitivity to the instantaneous Earth rotation vector and its near real-time data acquisition. We describe the theoretical compatibility of both types of observables.