• Title/Summary/Keyword: 과학기술위성 3호

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과학기술위성 3호 시스템 설계

  • Park, Jong-O;Lee, Seung-Heon;Sim, Eun-Seop;Lee, Seung-U;Kang, Gyeong-In;Jeong, Tae-Jin;Park, Jang-Hyeon;Lee, Jun-Ho
    • Bulletin of the Korean Space Science Society
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    • 2007.10a
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    • pp.58.1-58.1
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    • 2007

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Environmental Test Results of a Flight Model of a Compact Imaging Spectrometer for a Microsatellite STSAT-3 (과학기술위성3호 소형영상분광기 발사모델 환경시험 결과)

  • Lee, Sang-Jun;Kim, Jung-Hyun;Lee, Jun-Ho;Lee, Chi-Won;Jang, Tae-Sung;Kang, Kyung-In
    • Korean Journal of Optics and Photonics
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    • v.22 no.4
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    • pp.184-190
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    • 2011

  • A compact imaging spectrometer (COMIS) was developed for a microsatellite STSAT-3. The satellite is now rescheduled to be launched into a low sun-synchronous Earth orbit (~700 km) by the end of 2012. Its main operational goal is the imaging of the Earth's surface and atmosphere with ground sampling distance of 27 m and 2 - 15 nm spectral resolution over visible and near infrared spectrum (0.4 - 1.05 ${\mu}m$). A flight model of COMIS was developed following an engineering model that had successfully demonstrated hyperspectral imaging capability and structural rigidity. In this paper we report the environmental test results of the flight model. The mechanical stiffness of the model was confirmed by a small shift of the natural frequency i.e., < 1% over 10 gRMS random vibration test. Electrical functions of the model were also tested without showing any anomalies during and after vacuum thermal cycling test with < $10^{-5}$ torr and $-30^{\circ}C\;-\;35^{\circ}C$. The imaging capability of the model, represented by a modulation transfer function (MTF) value at the Nyquist frequency, was also kept unvaried after all those environmental tests.

  • https://doi.org/10.3807/KJOP.2011.22.4.184 인용 PDF KSCI

Design, Implementation and Test of Flight Model of S-Band Transmitter for STSAT-3 (과학기술위성 3호 S-대역 송신기 비행모델 설계, 제작 및 시험)

  • Oh, Seung-Han;Seo, Gyu-Jae;Lee, Jung-Soo;Oh, Chi-Wook;Park, Hong-Young
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.6
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    • pp.553-558
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    • 2011

  • This paper describes the development and test result of S-band Transmitter flight model(FM) of STSAT-3 by satellite research center(SaTReC), KAIST. The communication sub-system of STSAT-3 is consist of two different frequency band channels, S-band for Telemetry & Command and X-band for mission data. S-band Transmitter(STX) functionally made of modulator, frequency synthesizer, power amp and DC/DC converter. The transmission data is modulated by FSK(Frequency Shift Keying) and the interface between spacecraft sub-module and STX is RS-422 standard method. The FM STX is based on modular design. The RF output power of STX is 1.5W(31.7dBm) and BER of STX is under $1{\times}10^{-5}$ which meets the specification respectively. The FM STX is delivered Spacecraft Assembly, Integration and Test(AIT) level through the completion of functional Test and environmental(vibration, thermal vacuum) Test successfully.

  • https://doi.org/10.5139/JKSAS.2011.39.6.553 인용 PDF KSCI