• 제목/요약/키워드: Space technology

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Thermal Analysis of MIRIS Space Observation Camera for Verification of Passive Cooling

  • Lee, Duk-Hang;Han, Won-Yong;Moon, Bong-Kon;Park, Young-Sik;Jeong, Woong-Seob;Park, Kwi-Jong;Lee, Dae-Hee;Pyo, Jeong-Hyun;Kim, Il-Joong;Kim, Min-Gyu;Matsumoto, Toshio
    • Journal of Astronomy and Space Sciences
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    • 제29권3호
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    • pp.305-313
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    • 2012
  • We conducted thermal analyses and cooling tests of the space observation camera (SOC) of the multi-purpose infrared imaging system (MIRIS) to verify passive cooling. The thermal analyses were conducted with NX 7.0 TMG for two cases of attitude of the MIRIS: for the worst hot case and normal case. Through the thermal analyses of the flight model, it was found that even in the worst case the telescope could be cooled to less than $206^{\circ}K$. This is similar to the results of the passive cooling test (${\sim}200.2^{\circ}K$). For the normal attitude case of the analysis, on the other hand, the SOC telescope was cooled to about $160^{\circ}K$ in 10 days. Based on the results of these analyses and the test, it was determined that the telescope of the MIRIS SOC could be successfully cooled to below $200^{\circ}K$ with passive cooling. The SOC is, therefore, expected to have optimal performance under cooled conditions in orbit.

Preliminary Performance Results for FIMS detector

  • U.W. Nam;J.G. Rhee;H. Jin;W. Han;Lee, D.H.;K.I. Kang;J. Seon;K.W. Min;E.J. Korpela
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2000년도 한국우주과학회보 제9권1호
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    • pp.43-43
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    • 2000
  • No Abstract, See Full Text

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Space Development and Relevant Regulations of PRC

  • Juqian, LI
    • 한국항공우주법학회:학술대회논문집
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    • 한국항공우주법학회 2008년도 제40회 국제학술발표대회
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    • pp.235-255
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    • 2008
  • On the basis of briefing the development of space technology and activity in China, this essay analysis the characteristics and main rules of the space regulations in China, and proposes how to advance and perfect the space law in China further. The beginning of space technology in China can be traced back to 1956. After more than fifty years development phased in three periods of technology preparation, technology experimentation and engineering application, the achievement of space technology and activity in China is noticeable in the world. But the space legislations in China, which is mainly composed as ministerial rules, orders, and regulatory documents, are really lagged far behind the space activity, and can not adapt to the quick and comprehensive development of space activity. Therefore, national space law must be passed in time.

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Observation Planning Software for FIMS

  • Park, J.H.;K.I. Seon;I.S. Yuk;U.W. Nam;W. Han;K.S. Ryu;K.W. Min;J. Seon;J. Edelstein
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2000년도 한국우주과학회보 제9권1호
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    • pp.49-49
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    • 2000
  • No Abstract, See Full Text

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Overview of control and data processing schemes of FIMS

  • Lee, D.H.;K.I. Kang;J.G. Rhee;J.H. Seon;K.W. Min;U.W. Nam;H. Jin;W. Han;E.J. Korpela
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2000년도 한국우주과학회보 제9권1호
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    • pp.42-42
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    • 2000
  • No Abstract, See Full Text

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러시아-우크라이나 전쟁(러시아의 우크라이나 침공)의 우주전 분석 및 양상 그리고 우주기술 개발시 고려사항 (Analysis and Aspects of Space Warfare in the Russia-Ukraine War (Russian Invasion of Ukraine) and Considerations for Space Technology Development)

  • 최성환
    • 우주기술과 응용
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    • 제2권2호
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    • pp.169-186
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    • 2022
  • 본 글에서는 러시아의 우주위협 평가와 러시아-우크라이나 전쟁(러시아의 우크라이나 침공)의 우주전을 분석하고 양상에 대해 정리하였다. 우주전의 양상이 상용위성 또한 잠재적인 공격 대상이 될 개연성을 고려하여 우주기술 개발시 군용위성뿐만 아니라, 상용위성도 우주위협에 대비할 수 있는 우주기술을 개발하고 동일하게 적용해야 함을 제언하고 적용이 필요한 우주기술에 대해 열거하였다.

MIRIS EOC 주경의 광기계 해석 (Opto-mechanical Analysis for Primary Mirror of Earth Observation Camera of the MIRIS)

  • 박귀종;문봉곤;박성준;박영식;이대희;이창희;나자경;정웅섭;표정현;이덕행;남욱원;이승우;양순철;한원용
    • 한국광학회지
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    • 제22권6호
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    • pp.262-268
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    • 2011
  • 한국천문연구원이 개발한 다목적적외선영상시스템(Multi-purpose IR Imaging System, MIRIS)은 과학기술위성 3호(STSAT-3)의 주탑재체이다. 지구관측카메라(Earth Observation Camera, EOC)는 MIRIS를 구성하는 두 개의 적외선 카메라 중에 하나로, 지구의 $3{\sim}5{\mu}m$ 파장대의 적외선을 관측하기 위한 카메라이다. EOC의 광학계는 카세그레인 방식으로써 구경이 100 mm이고, 주경과 부경은 모두 비구면 반사경이다. EOC 주경의 플렉서는 링 타입으로써 발사환경에서 주경이 겪을 수 있는 충격과 진동을 견디도록 예압을 가하며 주경을 지지한다. 이는 마치 리테이너로 렌즈를 지지하는 것과 같은 메커니즘으로 주경을 지지하기 위한 시도이다. 광기계 해석을 통해 EOC 주경이 효과적으로 지지되고 있음을 확인했다.

Development of 80cm Telescope for Muju County Public Astronomical Observatory

  • Min, S.W.;Kim, S.J.;Jang, M.;Mun, B.S.;Lee, D.H.;Lee, T.H.;Moon, K.S.;Seol, K.H.
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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    • pp.37.1-37.1
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    • 2008
  • Space Science and Technology Laboratory at Kyung Hee University developed an 80cm Nasmyth telescope with the joint work of Space & Astronomy, Inc. It was set up at Muju county public astronomical observatory in Jeonlabuk-Do. Nasmyth focus system was selected for the telescope to use two focal points by a rotatable tertiary mirror. Focal ratios of the telescope are f10, f5 respectively. Support of the main mirror is made with Lasalle-system. This system uses 24-points in the back side of the mirror that are all resting on small counter-weights and side support is 10-points Boll link Flexible type with 2 Lasalle type. The mount is wheel & disk type Alt-Azimuth design using DC-servo motors. External high accuracy encoder has 47,600 sine-waves/rot. These encoders are used to make real-time corrections on all gearing errors.

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