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http://dx.doi.org/10.20910/JASE.2022.16.5.8

Analysis of orbit control for allocation of small SAR satellite constellation  

Song, Youngbum (Hanwha System Corporation)
Son, Jihae (Hanwha System Corporation)
Park, Jin-Han (Hanwha System Corporation)
Song, Sung-Chan (Hanwha System Corporation)
Oh, Hyun-Ung (Chosun University, (Agency for Defense Development))
Publication Information
Journal of Aerospace System Engineering / v.16, no.5, 2022 , pp. 8-16 More about this Journal
Abstract
This paper presents the orbital control for positioning micro synthetic aperture radar (SAR) satellites for all-weather monitoring around the Korean Peninsula. In Small SAR technology experimental project (S-STEP) developed in Korea, multiple satellites are placed at equal intervals in multiple orbital planes to secure an average revisit period for the region around the Korean Peninsula. Satellites entering the same orbital plane use ion thrusters to control their orbits and the separation velocity from the launch vehicle to distribute them evenly across the orbit. For an orbital that places the satellites equally spaced in the same orbital plane, the shape of the satellite constellation is formed by adjusting the difference in drift rates between the satellites. This paper presents, different types of satellite constellations, and the results of satellite constellation placement according to launch strategies are presented. In addition, a method and limitations in shortening the duration of orbital deployment are presented.
Keywords
Drift Rate; Orbit Control; Orbit Deployment; Satellite Constellation; S-STEP;
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