commerce, management, and apace law
Hamid Kazemi; Samaneh Elahian
Volume 15, Issue 2 , June 2022, , Pages 93-102
Abstract
In this article collision probability method is used to satellite collision risk analysis. Among different methods introduced for determining collision probability, Patera's (2005) and Chan methods are chosen to define Noor satellite collision to the other space objects. According to criteria described ...
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In this article collision probability method is used to satellite collision risk analysis. Among different methods introduced for determining collision probability, Patera's (2005) and Chan methods are chosen to define Noor satellite collision to the other space objects. According to criteria described in the article, Advanced Conjunction Analysis Tools of STK software applied for collision risk analysis. The software, determine position of each object in space using Two Line Elements and appropriate propagation model according to altitude of the orbit. So collision probability calculated by one of the cpllision probability methods. If derived prababilty is larger than 10-3, so its necessary to schdule for suitable maneuver to avoid collision.
Hossean Bolandi; Mohammad Hassan Ashtari; Ghodratollah Barati; Jafar Kochaki; Mohammad Sadegh Zayghami; Majed Esmaeilzadeh
Volume 8, Issue 3 , October 2015, , Pages 65-70
Abstract
In the mission of satellites, instantaneous positioning and estimation of the future position are necessary. In the communication satellite, this matter is so important. Thus in the Tadbir satellite, for the first time in the country, we consider an orbit determination subsystem that equipped with a ...
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In the mission of satellites, instantaneous positioning and estimation of the future position are necessary. In the communication satellite, this matter is so important. Thus in the Tadbir satellite, for the first time in the country, we consider an orbit determination subsystem that equipped with a spaceborne GPS receiver and contains appropriate algorithms in order to achieve satellite position data during the lunch period and in the orbit. In this paper a brief review of the software and hardware parts of this subsystem is presented. In additional the process of testing to achieve good performance, including functional tests of ODS processor board and functional test of GPS receiver with GPS simulator, environmental condition tests, mechanical tests, thermal vacuum cycle tests, electromagnetic compatibility test and finally integrated satellite tests are stated. This paper, in addition to a description of the Tadbir satellite orbit determination subsystem, an implementation testing of a satellite subsystem is demonstrated, which can be useful to other space field researchers. Â
