• Title/Summary/Keyword: Science and Technology Space

Search Result 3,586, Processing Time 0.044 seconds

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
    • Bulletin of the Korean Space Science Society
    • /
    • 2000.04a
    • /
    • pp.49-49
    • /
    • 2000

  • No Abstract, See Full Text

  • PDF

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
    • /
    • v.29 no.3
    • /
    • pp.305-313
    • /
    • 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.

  • https://doi.org/10.5140/JASS.2012.29.3.305 인용 PDF KSCI

Operational Concept of the NEXTSat-1 for Science Mission and Space Core Technology Verification

  • Shin, Goo-Hwan;Chae, Jang-Soo;Lee, Sang-Hyun;Min, Kyung-Wook;Sohn, Jong-Dae;Jeong, Woong-Seob;Moon, Bong-Gon
    • Journal of Astronomy and Space Sciences
    • /
    • v.31 no.1
    • /
    • pp.67-72
    • /
    • 2014

  • The next generation small satellite-1 (NEXTSat-1) program has been kicked off in 2012, and it will be launched in 2016 for the science missions and the verification of space core technologies. The payloads for these science missions are the Instrument for the Study of Space Storms (ISSS) and NIR Imaging Spectrometer for Star formation history (NISS). The ISSS and the NISS have been developed by Korea Advanced Institute of Science and Technology (KAIST) and Korea Astronomy and Space science Institute (KASI) respectively. The ISSS detects plasma densities and particle fluxes of 10 MeV energy range near the Earth and the NISS uses spectrometer. In order to verify the spacecraft core technologies in the space, the total of 7 space core technologies (SCT) will be applied to the NEXTSat-1 for space verification and those are under development. Thus, the operation modes for the ISSS and the NISS for space science missions and 7 SCTs for technology missions are analyzed for the required operation time during the NEXTSat-1's mission life time of 2 years. In this paper, the operational concept of the NEXTSat-1's science missions as well as the verification of space core technologies are presented considering constraints of volume, mass, and power after launch.

  • https://doi.org/10.5140/JASS.2014.31.1.67 인용 PDF KSCI

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

  • Park, Kwi-Jong;Moon, Bong-Kon;Park, Sung-Jun;Park, Young-Sik;Lee, Dae-Hee;Ree, Chang-Hee;Nah, Jak-Young;Jeong, Woog-Seob;Pyo, Jeong-Hyun;Lee, Duk-Hang;Nam, Uk-Won;Rhee, Seung-Wu;Yang, Sun-Choel;Han, Won-Yong
    • Korean Journal of Optics and Photonics
    • /
    • v.22 no.6
    • /
    • pp.262-268
    • /
    • 2011

  • MIRIS(Multi-purpose Infra-Red Imaging System) is the main payload of the STSAT-3(Korea Science and Technology Satellite. 3), which is being developed by KASI(Korea Astronomy & Space Institute). EOC(Earth Observation Camera), which is one of two infrared cameras in MIRIS, is the camera for observing infrared rays from the Earth in the range of $3{\sim}5{\mu}m$. The optical system of the EOC is a Cassegrain prescription with aspheric primary and secondary mirrors, and its aperture is 100mm. A ring type flexure supports the EOC primary mirror with pre-loading in order to withstand expected load due to the shock and vibration from the launcher. Here we attempt to use the same mechanism by which a retainer supports the lens. Through opto-mechanical analysis it was confirmed that the EOC primary mirror is effectively supported.

  • https://doi.org/10.3807/KJOP.2011.22.6.262 인용 PDF KSCI

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.
    • Bulletin of the Korean Space Science Society
    • /
    • 2008.10a
    • /
    • pp.37.1-37.1
    • /
    • 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.

  • PDF