• Title/Summary/Keyword: Single/Dual Launch

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Design of Deep Space Missions Using a Dedicated Small Launch Vehicle (소형위성 전용 발사체를 이용한 심우주 임무 설계)

  • Choi, Su-Jin;Loucks, Mike;West, Stephen;Seo, Daeban;Lee, Keejoo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.50 no.12
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    • pp.877-888
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    • 2022
  • Recently, as the CAPSTONE, a precursor mission for Lunar Gateway, was launched on a small launch vehicle for the purpose of demonstrating communications and navigation technology in the NRHO, large attention was brought to this event that enabled high-impact deep space mission using dedicated small launch vehicle and small spacecraft. In this study, we introduced the concept of a dual launch operation and examined the capability of the new concept in the exploration of the Moon, Mars and asteroid. It turned out a single launch is sufficient for the lunar low orbit mission up to around 247 kg, and the dual launch option can transport 215 kg and 183 kg to nearby destinations as such as Mars and astroid Apophis respectively.

Thruster system for attitude control of launch vehicles (발사체 자세 제어용 추력기 시스템)

  • Shin, Dong-Sun;Han, Sang-Yeop;Kim, Young-Mog
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2006.11a
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    • pp.7-10
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    • 2006
  • In order to inject satellites into a target orbit, launch vehicles should have a precise attitude and control system capable of controlling three axises of pitch, yaw and roll. For launch vehicles, there are two types of attitude control system currently in popular use; the first one is a cold gas method, and the other is a liquid propulsion system using a single and dual property propellant. The purpose of this paper is to analyze the characteristics of thrust control system using said propellant, thereby providing for a rationale for its application to the upper stages of launch vehicles, in terms of the simplicity of the system, economics of structure and operation.

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Analysis on the Orbit Accuracy of KOMPSAT-5 (다목적실용위성 5호 궤도정밀도 분석)

  • Jung, Okchul;Chung, Deawon;Kim, Eunkyou;Yoon, Jaecheol;Hwang, Yoola
    • Aerospace Engineering and Technology
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    • v.13 no.2
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    • pp.108-114
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    • 2014
  • This paper describes the orbit accuracy of KOMPSAT-5, which has been in normal operations since the launch on Aug. 22, 2013. The analysis on the various GPS related data and the different methodologies for orbit estimation are carried out and compared with each other. The accuracy of precise orbit is confirmed to be 12.8cm($1{\sigma}$) on average using data from the in-flight dual frequency GPS receiver, GPS precise ephemeris, and IGS stations. In addition, the orbit estimation using single frequency GPS receiver provides the orbit solution around 2m level. And, the accuracy of orbit processing is 5m using on-board navigation solution, which has about 10m accuracy.