• Journal of Astronomy and Space Sciences
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• 제16권2호
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• pp.199-208
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• 1999

In this paper, KOMPSAT satellite launch and deployment operations are discussed. The U.S. Taurus launch vehicle delivers KOMPSAT satellite into the mission orbit directly. Launch and deployment operations is monitored and controlled by several international ground stations including Korean Ground Station (KGS). After separation from launch vehicle, KOMPSAT spacecraft deploys solar array by on-board autonomous stored commands without ground inter-vention and stabilizes the satellite such that solar arrays point to the sun. Autonomous ground communication is designed for KOMPSAT for the early orbit ground contact. KOMPSAT space-craft has capability of handing contingency situation by on-board fault management design to retry deployment sequence.

• 한국항공우주학회지
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• 제47권9호
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• pp.678-685
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• 2019

미래 전장 환경의 변화와 항공무기체계의 기술적 발전에 따라 유인기와 무인기의 상호 보완적인 유무인기 복합 운용을 통한 임무 수행이 요구된다. 기존의 유무인기 전투체계는 항공작전임무에 따라 운용되었으며 유무인기의 성능에 따라 수행 가능한 임무가 제한된다. 본 논문에서는 유무인기 협업 기반의 임무 도출을 위해 미 국방성의 무인기 시스템 로드맵과 공군의 항공작전을 분석한 후 기존의 유무인기의 임무를 분석한다. 다음으로 임무를 수행하기 위해 필요한 유무인기의 기본 기능을 식별하고 유무인기 협업 기반의 임무를 적 방공제압 임무로 선정한 후 이 임무를 수행하기 위한 절차를 단계별로 분석한다. 본 논문은 유무인기 복합 운용 개념의 구체화를 위해 임무 단계별 절차를 물리적인 공간 및 시간 순서의 맥락으로 분석하여 제안한다.

• 항공우주시스템공학회지
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• 제16권3호
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• pp.10-22
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• 2022

우주개발진흥 기본계획에 따르면 2031년까지 110여 기의 위성이 운영될 것으로 예상되며, 이에 따라 기존의 소수의 다중위성 운영과는 다른 군집위성 운영을 위한 운영개념과 기술이 필요하다. 효율적인 군집위성 운영을 위해 임무운영시스템의 자동화 및 최적화가 필수적이며, 국내에서도 군집위성 운영을 위한 준비가 시급하다. 본 논문에서는 효율적인 군집위성 운영을 위해 자동화 및 최적화를 적용한 임무운영시스템 발전방향 및 추진전략을 제안하였으며, 임무운영시스템의 자동화 수준 및 우선순위 평가를 위한 프레임워크를 개발하여 자동화를 우선적으로 적용하여야 하는 업무를 식별하였다.

• Journal of Astronomy and Space Sciences
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• 제40권2호
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• pp.79-88
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• 2023

On Aug. 4, 2022, at 23:08:48 (UTC), the Korea Pathfinder Lunar Orbiter (KPLO), also known as Danuri, was launched using a SpaceX Falcon 9 launch vehicle. Currently, KPLO is successfully conducting its science mission around the Moon. The National Aeronautics and Space Administration (NASA)'s Deep Space Network (DSN) was utilized for the successful flight operation of KPLO. A great deal of joint effort was made between the Korea Aerospace Research Institute (KARI) and NASA DSN team since the beginning of KPLO ground system design for the success of the mission. The efficient utilization and management of NASA DSN in deep space exploration are critical not only for the spacecraft's telemetry and command but also for tracking the flight dynamics (FD) operation. In this work, the top-level DSN interface architecture, detailed workflows, DSN support levels, and practical lessons learned from the joint team's efforts are presented for KPLO's successful FD operation. Due to the significant joint team's efforts, KPLO is currently performing its mission smoothly in the lunar mission orbit. Through KPLO cooperative operation experience with DSN, a more reliable and efficient partnership is expected not only for Korea's own deep space exploration mission but also for the KARI-NASA DSN joint support on other deep space missions in the future.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.31-36
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• 1999

The development of a low earth orbit microsatellite is recognized as a good means of enhancing the technological capability, to gain experience and to train engineers to acquire knowledge and experience in space systems. Most developed countries in space technology do not allow the transfer of critical space technologies such as technology involved in attitude determination and control systems. And the export of critical components and equipment such as high precision attitude sensors is tightly controlled. Therefore it is inevitable to independently acquire self-design and manufacturing capability to implement a satellite mission. The KITSAT-3 program was aimed at verifying the capability to design, develop and operate an indigenous microsatellite system, which includes such critical technologies and associated components and equipment, as well as train engineers. KITSAT-3 was launched on May 26, 1999 using the Indian launcher PSLV-C2. The operations team has successfully performed a full functional checkout during the launch and early operations phase and the satellite is presently in a normal operations mode. This paper introduces the KITSAT-3 program and the results of the initial operations.

• 대한원격탐사학회지
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• 제15권4호
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• pp.367-375
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• 1999

This paper describes the development, operations, and applications of ROCSAT-l and its Ocean Color Imager (OCI) remote-sensing payload. It is the first satellite program of NSPO. The satellite was successfully launched by Lockheed Martin's Athena on January 26, 1999 from Cape Canaveral, Florida. ROCSAT-l is a Low Earth Orbit (LEO) experimental satellite. Its circular orbit has an altitude of 600km and an inclination angle of 35 degrees. The satellite is designed to carry out scientific research missions, including ocean color imaging, experiments on ionospheric plasma and electrodynamics, and experiments using Ka-band (20∼30GHz) communication payloads. The OCI payload is utilized to observe the ocean color in 7 bands (including one redundant band) of Visible and Near-Infrared (434nm∼889nm) range with the resolution of 800m at nadir and the swath of 702km. It employs high performance telecentric optics, push-broom scanning method using Charge Coupled Devices (CCD) and large-scale integrated circuit chips. The water leaving radiance is estimated from the total inputs to the OCI, including the atmospheric scattering. The post-process estimates the water leaving radiance and generates different end products. The OCI has taken images since February 1999 after completing the early orbit checkout. Analyses have been performed to evaluate the performances of the instrument in orbit and to compare them with the pre-launch test results. This paper also briefly describes the ROCSAT-l mission operations. The spacecraft operating modes and ROCSAT Ground Segment operations are delineated, and the overall initial operations of ROCSAT-l are summarized.

• 한국군사과학기술학회지
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• 제14권5호
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• pp.781-787
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• 2011

Mine countermeasure missions(MCMs) may induce the loss of human and ship because of the covert of mine. In recent years, unmanned underwater vehicles(UUVs) have emerged as viable technical solution for conductimg underwater search, surveillance, and clearance operations in support of mine countermeasure missions because of her autonomy and long time endurance capability. This paper introduces a technical approach to mine countermeasure mission effectiveness analysis and presents some simulation-based analysis results for engineering of the UUV system definition which could be support analysis of alternatives for system definition and design.

• 항공우주기술
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• 제8권2호
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• pp.170-178
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• 2009

위성 개발 및 운영의 주체가 달라서 이중으로 소모되는 에너지를 줄이기 위해 공통지상 시스템의 통합 개발이 절실히 필요하다. 위성의 개발, 시험, 통합, 발사, 궤도 운영, 임무 수행의 전주기를 아우르는 공통지상시스템을 개발하기 위해서는 모든 단계에서 사용될 수 있는 언어를 개발해야 한다. 이를 위해 위성 시험운영언어의 유럽표준인 PLUTO와 가장 대표적인 언어중 하나인 STOL과 ELISA 및 PIL과 현재 항공우주연구원 AIT의 위성 시험 언어인 ATS와 지상국 운영시스템인 MCE를 자세히 분석하고, 이를 토대로 통합 절차서 언어 개발을 위한 설계 요건들을 제안한다.

• 한국위성정보통신학회논문지
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• 제1권2호
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• pp.76-82
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• 2006

한국전자통신연구원이 개발하여 항공우주연구원의 관제소에 설치한 아리랑2호 위성 관제시스템은 지난 7월 28일 발사된 아리랑2호 위성의 운용에 사용되고 있다. 아리랑2호 관제시스템의 대표적인 기능으로는 원격측정데이터 수신 및 처리, 원격명령 생성 및 송신, 위성 추적 및 거리측정, 궤도 예측 및 결정, 위성자세 조정계획, 그리고 위성 시뮬레이션 등이 있다. 아리랑2호 위성은 아리랑1호 위성의 임무를 이어받아 수행하며, MSC (Multi Spectral Camera) 및 정밀궤도결정, 정밀자세결정 등을 통해 아리랑1호에 비해 훨씬 향상된 해상도의 사진을 제공하는 성능을 가지고 있다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.482-485
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• 2002

For mission-critical and safe-critical operations of medical information, financial, or administrative systems, a reliable and robust storage system is indispensable. The main purpose of our research is to develop a high-confidential, reliable, and survivable storage system.