Effect of orbit inclination on the performance of FORMOSAT-3/-7 type constellations
Effect of orbit inclination on the performance of FORMOSAT-3/-7 type constellations
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DOI：
10.1016/j.actaastro.2012.05.005
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发表时间：
2013
影响因子：
3.5
通讯作者：
R. Chern;Chieh-Ming Huang
中科院分区：
文献类型：
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作者：
R. Chern;Chieh-Ming Huang
本文研究了轨道倾角对台湾3号卫星（FORMOSAT-3或FS3）和FORMOSAT-7 （FS7）型星座性能的影响。它是一个由6颗轨道倾角为72°、高度为800公里的微卫星组成的星座，用于获取全球定位系统（GPS）信号掩星数据。国际空间界对FS3的贡献给予了非常积极的评价。因此，NSPO正在规划未来的项目，并指定FS7作为FS3的后续项目。评价FS3/7型星座的性能主要有两个指标：每日数据采集的最大化和全球数据分布的均匀性。从系统仿真来看，FS3的数据采集次数为2415次。然而，通过改变轨道倾角为154°，这个数字可以增加到3050。缺点是没有超过北纬/南纬45°的数据。经过权衡，发现最优配置为3颗卫星在154°倾角部署，2颗卫星在108°倾角部署，1颗卫星在90°倾角部署。使用此配置，每天的数据采集量为2924。为读者提供信息，3-2-1配置可能被称为“混合星座”，因为它不是像“沃克”或“德拉姆”或“巴拉德”星座那样的标准星座。
This paper investigates the effect of orbit inclination angle on the performance of the Formosa satellite number 3 (FORMOSAT-3 or FS3) and FORMOSAT-7 (FS7) type constellations. The FS3 developed by National Space Organization (NSPO) of Taiwan was launched on 15 April 2006. It is a constellation consisting of 6 microsatellites at 72° orbit inclination and 800 km altitude for the acquisition of the global positioning system (GPS) signal occultation data. The international space community has given very positive comments on the contribution of FS3. Therefore, NSPO is planning the future program and designates FS7 to be the follow-up of FS3. There are two major indexes to assess the performance of FS3/7 type constellations: maximization of daily data acquisition and evenness in global data distribution. From system simulation, the number of data acquisition of FS3 is 2415. However, the number can be increased to 3050 by changing the orbit inclination to 154°. The drawback is that there is no data beyond 45° latitude north/south. After trade-off, it has been found that the optimal configuration is a 3–2–1 combination with 3 satellites deployed at 154° inclination, 2 satellites at 108° and 1 satellite at 90°. Daily data acquisition is 2924 using this configuration. For readers′ information, the 3–2–1 configuration could probably be called the “hybrid constellation” because it is not a standard one like the “Walker” or “Draim” or “Ballard” constellations.