• Title/Summary/Keyword: Telemetry Ground Station

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Study of the Telemetry Ground Station for FA-50 Flight Test Instrumentation System (신규 형상에 따른 FA-50 지상계측 방안 연구)

  • Lee, Ju-Ha;Kim, Bo-Sung;Yoo, Byeong-Seon
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.16 no.4
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    • pp.20-25
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    • 2008
  • The purpose of this study is leading to reduce the setup time and cost of the ground telemetry system for FA-50 program. And using the accumulated experience during T-50 and TA-50 development period, remove the risk of development and construct the optimal ground telemetry system for FA-50. For this study, collect the ground telemetry data of the T-50/TA-50, analyze the data and problems and then suggest the optimal telemetry ground system for FA-50.

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TELEMETRY TIMING ANALYSIS FOR IMAGE RECONSTRUCTION OF KOMPSAT SPACECRAFT

  • Lee, Jin-Ho;Chang, Young-Keun
    • Journal of Astronomy and Space Sciences
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    • v.17 no.1
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    • pp.117-122
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    • 2000
  • The KOMPSAT(Korea Multi-Purpose SATellite) has two optical imaging instruments called EOC(Electro-Optical Camera) and OSMI (Ocean Scanning Multispectral Imager). The image data of these instruments are transmitted to ground station and restored correctly after post-processing with the telemetry data transfeered from KOMPSAT spacecraft. The major timing information of the KOMPSAT is OBT (On-Board Time) which is formatted by the on-board computer of the spacecraft, based on 1Hz sync. pulse coming from the GPS receiver involved. The OBT is transmitted to ground station with the house-keeping telemetry data of the spacecraft while it is distributed to the instruments via 1553B data bus for synchronization during imaging and formatting. The timing information contained in the spacecraft telemetry data would have direct relation to the image data of the instruments, which should be well explained to get a more accurate image. This paper addresses the timing analysis of the KOMPSAT spacecraft and instruments, including the gyro data timing analysis for the correct restoration of the EOC and OSMI image data at ground station.

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Interference Analysis for Mutual Coexistence between Telemetry System based on IRIG Standard and Commercial LTE-TDD (IRIG 표준기반의 Telemetry 시스템과 상용 LTE-TDD간 상호공종을 위한 간섭분석)

  • Yun, Deok-Won;Choi, Joo-Pyoung;Lee, Won-Cheol;Kim, Chun-Won;Han, Jeong-Woo;Kim, Dae-Oh
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.10 no.6
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    • pp.512-521
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    • 2017
  • Telemetry ground station use very high gain directional antenna systems that are sensitive to interference from other RF communication systems, Without appropriate interference protection, these systems could be severely impacted or even rendered useless for mission support. In ECC, we suggested ans interference analysis method between LTE-TDD system and telemetry ground station using 2.3GHz. In this paper, based on the interference analysis scenario considered in Electronic Communication Committee, We have derived mutual coexistence separation distance between telemetry ground station and LTE-TDD system(Base station, User equipment) in Spatial domain.

Design of Downlink Channel for Transportable KOMPSAT Ground Station Using Sub-Carrier Signal (부 반송파를 사용하는 이동형 다목적실용위성 관제국에 대한 하향 링크 채널 설계)

  • Ahn, Sang-Il;Park, Dong-Chul
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.3
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    • pp.313-321
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    • 2009
  • This paper describes the downlink design of a transportable small-sized KOMPSAT ground station using sub-carrier signal. Based on the analysis of the transmission modes of satellite real-time telemetry and range measurement signals, the downlink channel design of KOMPSAT ground station using sub-carrier signal was processed. By considering the threshold signal-to-noise ratio of real-time 2 kbps telemetry signal and the required signal-to-noise ratio for satellite range measurement, the small-sized KOMPSAT downlink channel with G/T value of 6.5 dB/K was designed. The real G/T of implemented ground station was proven to be 6.62 dB/K when measured using the Sun. Moreover, through interface test with KOMPSAT, the ground station has shown the required link performance for real-time telemetry acquisition using sub-carrier and was consequently evaluated to be adequate for a transportable small-sized KOMPSAT ground station.

Link Margin Analysis on Telemetry for KSLV-I Launch (KSLV-1 발사를 위한 원격측정신호 Link Margin 분석)

  • Oh, Chang-Yul;Lee, Sung-Hee;Kim, Dong-Hyun;Kwon, Sun-Ho
    • Aerospace Engineering and Technology
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    • v.8 no.2
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    • pp.105-112
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    • 2009
  • Telemetry data is very important for the Launch Mission and Flight Safety Control during the Space Launch. In Naro Space Center, several telemetry stations such as a small station in the NARO space center, two stations in Jeju and a downrange station on a ship are deployed for the stable acquisition/receiving of the telemetry signals. In this paper, the Link Margin and Reliability for the telemetry are analyzed to evaluate the probability of the signal receiving of each station. Even though the proper analysis is to using the on-board EIRP(Effective Isotropic Radiation Power) values in the direction of the ground station considering the predicted flight trajectory and the locations of the stations, the global EIRP of 95% spatial coverage has been used for the analysis, due to the limitation of the available data.

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Development of Link Budget Model and Simulator for Telemetry System of Small Launch Vehicle (소형 발사체 원격측정시스템을 위한 링크 버짓 모델 및 시뮬레이터 개발)

  • TaeckKeun Oh;You-Sang Lee;Dae-Hyun Lee;Onsoo Lee
    • Journal of Advanced Navigation Technology
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    • v.28 no.3
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    • pp.278-287
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    • 2024
  • In this paper, telemetry link budget model for small launch vehicle is proposed, and telemetry link budget simulator is implemented. The proposed link budget model consist of geometry model and propagation loss model. The geometry model is calculation of look angle between ground station and small launch vehicle. The propagation loss model consist of free space loss, polarization loss, and de-pointing loss which are appropriate to the small launch vehicle flight environment. The proposed propagation loss model can be calculate propagation loss without complex calculation of propagation environments. The link budget simulator is implemented in MATLAB. The simulator calculate look angle, free space loss, polarization loss parameter, de-pointing loss and received signal level in ground station by using position of ground station, routing of small launch vehicle, 3-D radiation patterns of antennas.

Engineering Qualification Model Development of S-band Receiver for STSAT-3 (과학기술위성 3호 S 대역 수신기 기술인증모델 개발)

  • Lee, Jung-Su;Oh, Seung-Han;Seo, Gyu-Jae;Oh, Chi-Wook;Myung, Noh-Hoon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.37 no.6
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    • pp.609-614
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    • 2009
  • The TT&C communication subsystem of STSAT-3 is consisted of communication link to send telemetry data of spacecraft to the ground station and receive command data from ground station. The S-band receiver is used to receive command data from ground station, Engineering Qualification Model of S-band receiver has been designed and manufactured. The Designed S-band Receiver uses a single conversion for a simple frequency conversion, including a DC-DC Converter and EMI Filter. Also, Digital demodulation part designed using FPGA and RS-422 data interface. The performance of S-band Receiver in functional and space environments test satisfies the requirements of STSAT-3.

The Development of a Telemetry System for ALQ-X (ALQ-X 전자방해체계용 원격전송 장치 개발)

  • Nam Yun Kwon;Lee Byeong Nam;Lee Seung Geun;Lyu Jeong Ho;Lee Dong Keun
    • Journal of the Korea Institute of Military Science and Technology
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    • v.8 no.1 s.20
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    • pp.56-61
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    • 2005
  • A novel method for telemetering flight operational data of airborne jammer to ground station is presented. The design and construction of an onboard telemetry transmitting set and a ground receiving set which are necessary for realizing this novel method is described. Using this novel method, ALQ-X, airborne jammer, can immediately transmit the gathered data during flight without additional exclusive telemetry set.

A Study on a Tracking Method of Telemetry Signal using Self-Slaving (Self-Slaving을 이용한 원격측정 신호추적 기법 연구)

  • Lee, Sung-Pil
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.3
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    • pp.50-57
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    • 2008
  • A telemetry ground station has a highly directional, parabolic tracking antenna to receive a weak telemetry signal from a target at a distance. The tracking antenna with narrow beam-width normally uses the auto-track method for the target tracking. This paper presents several issues in the auto-track method and introduces a new tracking method using Self-Slaving technique. Self-Slaving means that the tracking antenna is slaved to not data measured by RADAR but GPS/INS informations received by the telemetry system for pointing. The Self-Slaving method shows good performance in comparison with auto-track method.

Link anlaysis of TTC system for LEO satellite (저궤도 위성 관제 시스템의 링크 특성 분석)

  • 장대익;이점훈;김영완;최재익
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.7
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    • pp.39-47
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    • 1997
  • The mission of the TTC system is to acquire and process the telemetry data from the satellite and to provide mission planning and satellite control for the target stellite system. In this paper, the transmission scheme for the Tracking, Telemetry and Command(TTC) system of satelliteis described and determined according to the recommendation of CCSDS, and the channel characteristics are analyzed according to modulation method. Expecially, we introduced the concepts of carrier vs. telemetry data power ratio which causes the channel performance to degrade, and analyzed the effects of transmission performance according to the power ratio of carrier vs. telemetry data and the modulation index. The channel of the LEO TTC sytem is different with usual satellite communication system. So, we have generalized the link budget of TTC sytem for using the link budget of ground station well-known and proposed the determination method of modultion indices for improveing channel performance.

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