کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11012171 | 1800958 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Integrating BDS and GPS for precise relative orbit determination of LEO formation flying
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی هوافضا
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چکیده انگلیسی
Low-Earth-Orbit (LEO) formation-flying satellites have been widely applied in many kinds of space geodesy. Precise Relative Orbit Determination (PROD) is an essential prerequisite for the LEO formation-flying satellites to complete their mission in space. The contribution of the BeiDou Navigation Satellite System (BDS) to the accuracy and reliability of PROD of LEO formation-flying satellites based on a Global Positioning System (GPS) is studied using a simulation method. Firstly, when BDS is added to GPS, the mean number of visible satellites increases from 9.71 to 21.58. Secondly, the results show that the 3-Dimensional (3D) accuracy of PROD, based on BDS-only, GPS-only and BDSâ¯+â¯GPS, is 0.74â¯mm, 0.66â¯mm and 0.52â¯mm, respectively. When BDS co-works with GPS, the accuracy increases by 29.73%. Geostationary-Earth-Orbit (GEO) satellites and Inclined Geosynchronous-Orbit (IGSO) satellites are only distributed over the Asia-Pacific region; however, they could provide a global improvement to PROD. The difference in PROD results between the Asia-Pacific region and the non-Asia-Pacific region is not apparent. Furthermore, the value of the Ambiguity Dilution Of Precision (ADOP), based on BDSâ¯+â¯GPS, decreases by 7.50% and 8.26%, respectively, compared with BDS-only and GPS-only. Finally, if the relative position between satellites is only a few kilometres, the effect of ephemeris errors on PROD could be ignored. However, for a several-hundred-kilometre separation of the LEO satellites, the Single-Difference (SD) ephemeris errors of GEO satellites would be on the order of centimetres. The experimental results show that when IGSO satellites and Medium-Earth-Orbit (MEO) satellites co-work with GEO satellites, the accuracy decreases by 17.02%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Aeronautics - Volume 31, Issue 10, October 2018, Pages 2013-2022
Journal: Chinese Journal of Aeronautics - Volume 31, Issue 10, October 2018, Pages 2013-2022
نویسندگان
Bin YI, Defeng GU, Xiao CHANG, Kai SHAO,