Precise station positions from VLBI observations to satellites: a simulation study
Precise station positions from VLBI observations to satellites: a simulation study
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DOI：
10.1007/s00190-014-0712-1
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发表时间：
2014-03
影响因子：
4.4
通讯作者：
L. Plank;J. Böhm;H. Schuh
中科院分区：
文献类型：
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作者：
L. Plank;J. Böhm;H. Schuh
对卫星进行甚长基线干涉测量跟踪是建立空间联系方面日益引起兴趣的一个议题。这将加强有助于建立国际地球参考框架的各种空间大地测量技术之间的联系。观测近地卫星的概念要求对可能的观测战略进行研究。在本文中，我们介绍了这一概念，并讨论其可能的好处，以改善未来实现的国际地面参考系统。使用模拟观测，我们开发了可能的观测策略，允许确定射电望远镜在地球上的卫星系统中的位置，精度为几毫米至1-2厘米，每周站坐标。这是由密集的区域和全球VLBI网络观测到的轨道高度在2，000至6，000公里之间的卫星。主要由卫星轨道和观测间隔决定的观测次数被认为是影响预期精度的最关键参数。对于全球定位系统卫星的观测，我们提出了与经典VLBI射电源相结合或多卫星观测的策略。这两种方法都允许站位置重复性为几毫米的每周解决方案。
Very long baseline interferometry (VLBI) tracking of satellites is a topic of increasing interest for the establishment of space ties. This shall strengthen the connection of the various space geodetic techniques that contribute to the International Terrestrial Reference Frame. The concept of observing near-Earth satellites demands research on possible observing strategies. In this paper, we introduce this concept and discuss its possible benefits for improving future realizations of the International Terrestrial Reference System. Using simulated observations, we develop possible observing strategies that allow the determination of radio telescope positions in the satellite system on Earth with accuracies of a few millimeters up to 1–2 cm for weekly station coordinates. This is shown for satellites with orbital heights between 2,000 and 6,000 km, observed by dense regional as well as by global VLBI-networks. The number of observations, as mainly determined by the satellite orbit and the observation interval, is identified as the most critical parameter that affects the expected accuracies. For observations of global positioning system satellites, we propose the combination with classical VLBI to radio sources or a multi-satellite strategy. Both approaches allow station position repeatabilities of a few millimeters for weekly solutions.