• Title/Summary/Keyword: Naro Space Center

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A Study on the Characteristics of Convective Activities related to Atmospheric Stability Index and Thunderstorms over the Naro Space Center (나로우주센터 상공의 대기 안정도지수 및 뇌운관련 대류활동 특성 연구)

  • Kim, Hong-Il;Choi, Eun-Ho;Seo, Seong-Gyu
    • Journal of Environmental Science International
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    • v.28 no.12
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    • pp.1133-1145
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    • 2019
  • Successful launch requires state-of-the-art launch vehicle technology and constant test operations, However, the meteorological threat to the launch vehicle flight trajectory is also an important factor for launch success. Atmospheric stability above the Naro Space Center at the this time is very important, especially because the initial flight operation can determine the success of the launch. Moreover, during the flight of launch vehicle with rapid pressure and thrust into the atmosphere, convection activity in the atmosphere may create environmental conditions that cause severe weather threats such as thunderstorms. Hence, studies of atmospheric instability characteristics over the Naro Space Center are a necessary part of successful launch missions. Therefore, the main aims of this study were to (1) verify the atmospheric stability index and convection activity characteristics over the Naro Space Center using radiosonde data observed from 2007 to 2018 by the Naro Space Center, (2) analyze changes in the atmospheric stability index according to monthly and seasonal changes, and (3) assess how the calculated atmospheric stability index is related to actual thunderstorm occurrence using statistical analysis. Additionally, we aimed to investigate the atmospheric characteristics above the Naro Space Center through the distribution chart of the atmospheric stability index during summer, when convection activity is highest. Finally, we assessed the relationship between lightning occurrence and unstable atmospheric conditions, through predictability analysis performed using the lightning observation data of the Korea Meteorological Administration.

A Study On The Configuration Of UHD High Speed Digital Camera System In the Naro Space Center (나로우주센터 초고화질(UHD) 고속 디지털카메라 시스템에 대한 구성방안 연구)

  • Park, Doo-Jin;Noh, Young-Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.10a
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    • pp.536-538
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    • 2017
  • UHD high speed digital camera system will be installed around launch pad and launch complex tower to acquire high speed image for motion analysis of integral parts of launch vehicle during the lift-off of KSLV-II in the Naro space center. In this paper, We compared configuration of high speed digital camera system operating in the Naro space center with UHD high speed digital camera system for mission of KSLV-II.

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Preliminary Analysis on Launch Opportunities for Sun-Earth Lagrange Points Mission from NARO Space Center

  • Song, Young-Joo;Lee, Donghun
    • Journal of Astronomy and Space Sciences
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    • v.38 no.2
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    • pp.145-155
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    • 2021
  • In this work, preliminary launch opportunities from NARO Space Center to the Sun-Earth Lagrange point are analyzed. Among five different Sun-Earth Lagrange points, L1 and L2 points are selected as suitable candidates for, respectively, solar and astrophysics missions. With high fidelity dynamics models, the L1 and L2 point targeting problem is formulated regarding the location of NARO Space Center and relevant Target Interface Point (TIP) for each different launch date is derived including launch injection energy per unit mass (C3), Right ascension of the injection orbit Apoapsis Vector (RAV) and Declination of the injection orbit Apoapsis Vector (DAV). Potential launch periods to achieve L1 and L2 transfer trajectory are also investigated regarding coasting characteristics from NARO Space Center. The magnitude of the Lagrange Orbit Insertion (LOI) burn, as well as the Orbit Maintenance (OM) maneuver to maintain more than one year of mission orbit around the Lagrange points, is also derived as an example. Even the current work has been made under many assumptions as there are no specific mission goals currently defined yet, so results from the current work could be a good starting point to extend diversities of future Korean deep-space missions.

Numerical Simulations of Local Wind Field at the Naro Space Center by MUKLIMO with Terrain and Surface Effects (지형과 지표효과를 고려한 나로 우주센터의 국지규모 바람장 수치모의)

  • Yoon, Ji-Won;Min, Kyung-Duk
    • Journal of the Korean earth science society
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    • v.25 no.8
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    • pp.784-798
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    • 2004
  • Microscale wind fields were simulated by MUKLIMO at the Naro Space Center, where complicated mountainous terrain and trees exist. In order to test the model's sensitivity with the effects of terrain and trees, experimental simulations were conducted under the various initial conditions. The experiments showed that the effects of trees were more significant on flat surfaces than on mountain cliffs. Based on the results, an actual 10 m level microscale wind field was simulated at the Naro Space Center, which has complicated mountainous terrain. Simulations of wind fields before and after the construction of the launching site were also conducted. It was found that MUKLIMO was of the mesoscale wind fields at the Naro Space Center.

Study on the random noise characteristic of the tracking radar in Naro space center (나로우주센터 추적레이더의 잡음 특성 분석)

  • Choi, Jee-Hwan;Shin, Han-Seop;Kim, Dae-Oh;Kim, Tae-Hyung
    • Aerospace Engineering and Technology
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    • v.9 no.1
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    • pp.151-157
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    • 2010
  • The tracking radars in NARO space center are precious, long-range tracking systems for tracking the launch vehicle (KSLV-1) and transmitting TSPI (Time, Space and Position Information) data to MCC (Mission Control Center). Because TSPI data from tracking radars to MCC are important information for the launch mission and flight safety control, TSPI data are required to be more accurate. In this paper, we analyzed theoretically the required specification of the random noise error in tracking radar and verified the real random noise error. In this analysis, we evaluated the TSPI data of several flight tests performed in NARO space center.

Analysis of Slant Range Accuracy Using The Transponder of Doppler Radar (도플러 레이다의 트랜스폰더를 이용한 사거리 정확도 분석)

  • Park, Doo-jin;Noh, Young-hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.10a
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    • pp.484-486
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    • 2018
  • MF-CW(Multi-Frequency Continuous Wave)operated on Electro-Optical Tracking System to measure slant range of space launch vehicle and aircraft at Naro Space Center. In this paper, we compared and analyzed the difference exactly measured slant range using the laser lightwave range measuring equipment with measured on the transponder and described the accuracy of slant range.

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A Study On The Doppler Radar Of Range Measurement On Electro-Optical Tracking System (광학추적장비의 거리측정 도플러 레이더에 관한 연구)

  • Park, Doo-Jin;Noh, Young-Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.10a
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    • pp.700-702
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    • 2016
  • The Doppler Radar that mounted on Electro Optical Tracking System has been operated to measure range and velocity during the initial mission of space launch vehicle at Naro space center. In this paper, we mentioned configuration of MFCW(Multi frequency Continuous Wave) and FMCW(Frequency Modulation Continuous Wave) Doppler Radar on Electro Optical Tracking System and described method of range measurement.

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The Study on Coordinate Transformation of the Tracking Radar in NARO Space Center (나로우주센터 추적레이더의 좌표 변환에 관한 연구)

  • Shin, Han-Seop;Choi, Jee-Hwan;Kim, Dae-Oh;Kim, Tae-Hyung
    • Aerospace Engineering and Technology
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    • v.10 no.1
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    • pp.116-121
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    • 2011
  • The tracking radar systems in NARO space center are used in order to acquire the TSPI (Time, Space, and Position Information) data of the launch vehicle. The tracking radar produce the measurements of tracked targets in the radar-centered coordinate system. When the tracking radar is in the Cartesian/Polar tracking mode, the state vector data is sent in radar-centered Cartesian/Polar coordinate system to RCC. RCC also send the slaving data in Test Range coordinate system to the tracking radar. So, the tracking radars have to transform the slaving data in Test Range coordinate system into in radar-centered coordinate system. In this study, we described the coordinate transformation between radar-centered coordinate system and Test Range coordinated system.

Technical Trend of Time Synchronization Equipment in Naro Space Center (나로우주센터 표준시각 동기화장비 기술동향)

  • Han, Yoo-Soo;Choi, Yong-Tae
    • Current Industrial and Technological Trends in Aerospace
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    • v.6 no.1
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    • pp.116-123
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    • 2008
  • In the launch mission, mission control systems and tracking systems need time synchronization for data monitoring and data analysis. There are several standards for time synchronization and an adequate standard is selected according to the requirement of time accuracy and cost among time synchronization standards. Oscillators are used to maintain time accuracy. There are some kinds of oscillators with diverse characteristics and an adequate oscillator can be adopted according to time accuracy. In this paper, we will specify characteristics of several oscillators and standards generally used for time synchronization. And we will also introduce TSDN(time synchronization and display network) for time synchronization in Naro Space Center.

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High-Performance Dual-Circularly Polarized Reflector Antenna Feed

  • Lim, Joo-Young;Nyambayar, Jargalsaikhan;Yun, Je-Young;Kim, Dong-Hyun;Kim, Tae-Hyung;Ahn, Bierng-Chearl;Bang, Jae-Hoon
    • ETRI Journal
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    • v.36 no.6
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    • pp.889-893
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    • 2014
  • This paper presents a high-performance dual-circularly polarized feed employing a dielectric-filled circular waveguide. Novel features are incorporated in the proposed feed, such as a dielectric rod radiator for high gain and good impedance matching; dual quarter-wave chokes for low axial ratio over wide angles and for low back radiation; an integrated septum polarizer; and two end-launch-type coaxial-to-waveguide transitions. The proposed feed shows excellent performance at 5.0 GHz to 5.2 GHz.