• 제목/요약/키워드: KARI(Korea Aerospace Research Institute)

검색결과 405건 처리시간 0.023초

DEVELOPMENT OF THE KSR-III UV RADIOMETER

  • Hwang, Seung-Hyun;Kim, Jhoon;Lee, Seung-Hoon;Kim, Joon-Kyu;Chun, Young-Doo;Park, Jung-Joo
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
    • /
    • 한국우주과학회 2002년도 한국우주과학회보 제11권1호
    • /
    • pp.61.1-61
    • /
    • 2002
  • PDF

Conceptual Study of GEO and LEO Sensors Characteristics for Monitoring Ocean Color around Korean Peninsula

  • Kang Gumsil;Kang Songdoug;Yong Sangsoon;Kim Jongah;Chang Youngjun;Youn Heongsik
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
    • /
    • pp.505-508
    • /
    • 2004
  • Korea Aerospace Research Institute (KARI) has a plan to launch COMS for consistent monitoring of the Korean Peninsula. Korea Geostationary Ocean Color Imager (GOCI) is one of the main payloads of COMS which will provide a monitoring of ocean-colour around the Korean Peninsula from geostationary platforms. Ocean color observation from geostationary platform is required to achieve the proper spatial and temporal resolution for coastal observation mission. In this paper the characteristics of GOCI and LEO sensors are discussed. GOCI will provide the measurement data of 6 visible channels and 2 near-infrared channels (400nm ~ 900nm). The integration time and aperture diameter required to achieve the SNR specification of KGOCI are analyzed.

  • PDF

과학 로켓 3호용 오존 측정기 개발 및 초기 모델 시험 결과 (DEVELOPMENT OF OZONE DETECTOR FOR KSR-III AND PRELIMINARY TEST RESULTS)

  • 황승현;김준;김준규;이수진;박정주;조광래
    • Journal of Astronomy and Space Sciences
    • /
    • 제17권2호
    • /
    • pp.277-284
    • /
    • 2000
  • KARI(Korea Aerospace Research Institute) has measured the ozone density profiles over the Korean Peninsular since the launch of the Korean Sounding Rocket-I (KSR-I) in 1993. The purpose of ozone measurements is to obtain the stratospheric and mesospheric vertical ozone density profiles over the Korean Peninsular with solar UV radiometers. With the visible channel of the radiometer, the attitude variation of the rocket was corrected and compensated. Developed system is based on ozone detector designs onboard the KSR-I and KSR-II. We discuss the development of ozone detector which will be onboard the KSR-III and its circuit and vibration test results for EM model.

  • PDF

Korea Multipurpose Statellite(KOMSAT) Program

  • Lee, Sang-Ryool;Lee, Jin-Ho;Kim, Jhoon;Ryoo, Jang-Soo
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
    • /
    • 한국우주과학회 1995년도 한국우주과학회보 제4권1호
    • /
    • pp.36-36
    • /
    • 1995
  • No Abstract. See Full-text

  • PDF

Determination of Cyclogram for Liquid-Propellant Rocket Engine

  • Ha, Seong-Up;Kwon, Oh-Sung;Lee, Jung-Ho;Kim, Byoung-Hun;Kang, Sun-Il;Han, Sang-Yeop;Cho, In-Hyun;Lee, Dae-Sung
    • International Journal of Aeronautical and Space Sciences
    • /
    • 제3권2호
    • /
    • pp.59-66
    • /
    • 2002
  • A vertical test stand based on launcher propulsion system was constructed and several tests for the determination of cyclogram were carried out. To make an accurate estimation, static and dynamic pressures were measured and analyzed. Especially, static pressure measurements using fast response sensors without extension tubes were used to determine operation sequence more evidently. The standard operation times of final valves were determined in cold flow tests with an engine head, and fire formation time in combustion chamber was checked in an ignition test with an ignitor only. On the basis of these tests, ignition sequence was established and combustion test cyclogram was finally determined. According to combustion test, test results were well matched with the determined cyclogram within 0.05 sec.

Introduction to COMS Geostationary Ocean Color Imager

  • Kang Gumsil;Kim Jongah;Myung Hwan-Chun;Yeon Jeong-Heum;Kang Song-Doug;Youn Heong-Sik
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
    • /
    • pp.108-111
    • /
    • 2005
  • The Communication Ocean, Meteorological Satellite (COMS) as the one of the national space program has been developed by Korea Aerospace Research Institute (KARl). The Geostationary Ocean Color Imager (GOCI) is one of the main payloads ofCOMS which will provide consistent monitoring of ocean-colour around the Korean Peninsula from geostationary platforms. The ocean color observation from geostationary platform is required to remedy the coverage constraints imposed by polar orbiting platforms. In this paper the main characteristics of GOCI are described and compared with the current ocean color sensors. The GOCI will provide the measurement data of 6 visible channels and 2 nearinfrared channels (40Onm - 900nm). The high radiometric sensitivity is essential of ocean color sensor because of the weak water leaving radiance.

  • PDF

Structural Design Development of GOCI

  • Yeon Jeoung-Heum;Kang Song-Doug;Kim Jongah;Kang Gurrl.sil;Myung Hwan-Chun;Youn Heong-Sik
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
    • /
    • pp.104-107
    • /
    • 2005
  • COMS(Communication, Ocean, and Meteorological Satellite) is the geostationary satellite for the mission of satellite communication, ocean monitoring, and meteorological service. It is scheduled to be launched at the end of 2008. Ocean payload of COMS named as GOCI(Geostationary Ocean Color Imager) observes ocean color and derives the chlorophyll concentrlition, the concentration of dissolved organic material and so on. In operational oceanography, satellite derived data products are used to provide forecasting and now casting of the ocean and coastal water state. In this work, conceptual design of structural part of GOCI is carried out and two baseline concepts are proposed. The one is dioptric module that uses lens system and the other is TMA(Three Mirror Anastigmat) module that uses mirror system. Trade-off studies between two concepts are investigated by considering optical and mechanical performances. Finally, on-going tasks and future development plan are briefly discussed.

  • PDF

Conceptual Design of the Meteorological Data Service for COMS

  • Kim, Jong-Woo;Lim, Hyun-Su;Seo, Seok-Bae;Choi, Hae-Jin;Choi, Seong-Bong
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
    • /
    • pp.513-515
    • /
    • 2003
  • COMS(Communication, Ocean and Meteorological Satellite), planned for launch in 2008, will be the first Korean ocean-meteorological geostationary satellite to provide capabilities for monitoring weather and ocean. Under the direction of Korean government, KARI(Korea Aerospace Research Institute) has the overall responsibility of COMS development project. The main development project was started in September 2003. In this paper, the overview of COMS development project and the conceptual design of the meteorological data service are introduced.

  • PDF

Modulation Transfer Function (MTF) Measurement For 1 m High Resolution Satellite Images such as KOMPSAT-2 U sing Edge Function

  • Song Jeong-Heon;Lee Dong-Han;Lee Sun-Gu;Seo Du-Ceon;Park Soo-Young;Lim Hyo-Suk;Paek Hong-Yul
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
    • /
    • pp.482-484
    • /
    • 2005
  • The Modulation Transfer Function (MTF) is commonly used to characterize the spatial quality of imaging systems. This work is the attempt to measure the MTF at Nyquist frequency of the satellite imaging system what has 1m spatial resolution for KOMPSAT-2 image using the edge function. Artificial tarp targets are used in this study. A type of this tarp edge consists of two adjacent uniform bright and dark sides commonly used to test the performance of an optical system in edge function. The results from this work demonstrate the potential applicability of this method to estimate the response characteristics for KOMPSAT-2 that is scheduled to be launched.

  • PDF

ROCKET MEASUREMENT OF MIDDLE ATMOSPHERIC OZONE CONCENTRATION PROFILE BY KSR-II

  • ;이수진;조희규;박병관;이재덕;최현돈;조광래
    • Journal of Astronomy and Space Sciences
    • /
    • 제15권2호
    • /
    • pp.391-400
    • /
    • 1998
  • KSR-II, a two-stage sounding rocket of KARI was launched successfully at the west coast of the Korean Peninsula at 1000LST, June 11, 1998. For the ozone measurement mission, 8-channel UV and visible radiometers were onboard the rocket. The rocket measured the first in situ stratospheric and mesospheric ozone density profile over Korea during its ascending phase using the radiometer. Comparisons with Dobson spectrophotometer, ozonesonde, and HALOE onboard the UARS are shown together. Our results are in reasonable agreements with others.

  • PDF