• Title/Summary/Keyword: ground station

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Design of Ground Station System for CubeSat STEP Cube Lab. (큐브위성 STEP Cube Lab.의 지상국 시스템 설계)

  • Jeon, Younghyeon;Chae, Bonggeon;Jeong, Hyeonmo;Jeon, Seongyong;Oh, Hyunung
    • Journal of Aerospace System Engineering
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    • v.6 no.4
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    • pp.34-39
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    • 2012
  • CubeSats classified as pico-class satellite require a ground station to track the satellite, transmit a command, and receive an on-orbit data such as SOH (State-of-Health) and mission data according to the operation plan. For this, ground station system has to be properly designed to perform a communication to with the satellite with enough up- and down-link budgets. In this study, a conceptual design of the ground station has been performed for the CubeSat named as STEP Cube Lab. (Cube Laboratory for Space Technology Experimental Project). The paper includes a ground station hardware interface design, link budget analysis and a ground station software realization. In addition, the operation plan of the ground station has been established considering the STEP Cube Lab. mission requirements.

Construction of Indoor Ground Station for Cubesat Communication Test (큐브위성 송수신시험을 위한 실내용 지상국 구축)

  • Han, Sanghyuck;Moon, Sangman;Shin, Dongyeop;Moon, SungTae;Gong, Hyeon Cheol;Choi, Gi-Hyuk
    • Aerospace Engineering and Technology
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    • v.13 no.2
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    • pp.73-79
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    • 2014
  • During developing cubesat flight software, Communication test between cubesat and ground station is needed. For this, we have constructed indoor ground station without outdoor antenna for decreasing total cost and time. In this time, if output power of ground station is high, it will affect for cubesat transceiver to be fail. For solving this problem, ground station must be designed for output power of it to be lower than input power of cubesat satellite, and it must be verified. In this paper, first, we describe cubesat indoor ground station using UHF and VHF. Second, we describe output power decreasing test for indoor operation of ground station by attaching attenuators in the end of the output connector.

Design of Ground Station System for CubeSat STEP Cube Lab. (큐브위성 STEP Cube Lab.의 지상국 시스템 개발)

  • Jeon, Younghyeon;Chae, Bonggeon;Jeong, Hyeonmo;Jeon, Seongyong;Oh, Hyunung
    • Journal of Aerospace System Engineering
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    • v.9 no.4
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    • pp.37-42
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    • 2015
  • The CubeSats is classified as a pico-class satellite which requires a ground station to track the satellite, transmit commands, and receive an on-orbit data such as SOH (State-of-Health) and mission data according to the operation plan. In order to this, the ground station system has to be properly designed to perform a communication to with the satellite with enough up- and down-link budgets. In this study, a conceptual design of the ground station has been performed for the CubeSat named as STEP Cube Lab. (Cube Laboratory for Space Technology Experimental Project). The paper includes a ground station hardware interface design, a link budget analysis and a ground station software realization. In addition, the operation plan of the ground station has been established considering the STEP Cube Lab. mission requirements.

Performance Analysis of Navigation Algorithm for GNSS Ground Station

  • Jeong, Seong-Kyun;Park, Han-Earl;Lee, Jae-Eun;Lee, Sang-Uk;Kim, Jae-Hoon
    • Journal of Satellite, Information and Communications
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    • v.3 no.2
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    • pp.32-37
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    • 2008
  • Global Navigation Satellite System (GNSS) is been developing in many countries. The satellite navigation system has the importance in economic and military fields. For utilizing satellite navigation system properly, the technology of GNSS Ground Station is needed. GNSS Ground Station monitors the signal of navigation satellite and analyzes navigation solution. This study deals with the navigation software for GNSS Ground Station. This paper will introduce the navigation solution algorithm for GNSS Ground Station. The navigation solution can be calculated by the code-carrier smoothing method, the Kalman-filter method, the least-square method, and the weight least square method. The performance of each navigation algorithm in this paper is presented.

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Ground Station Design for STSAT-3

  • Kim, Kyung-Hee;Bang, Hyo-Choong;Chae, Jang-Soo;Park, Hong-Young;Lee, Sang-Hyun
    • International Journal of Aeronautical and Space Sciences
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    • v.12 no.3
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    • pp.283-287
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    • 2011
  • Science and Technology Satellite-3 (STSAT-3) is a 150 kg class micro satellite based with the national space program. The STSAT-3 system consists of a space segment, ground segment, launch service segment, and various external interfaces including additional ground stations to support launch and early operation phases. The major ground segment is the ground station at the Satellite Technology Research Center, Korea Advanced Institute of Science and Technology site. The ground station provides the capability to monitor and control STSAT-3, conduct STSAT-3 mission planning, and receive, process, and distribute STSAT-3 payload data to satisfy the overall missions of STSAT-3. The ground station consists of the mission control element and the data receiving element. This ground station is designed with the concept of low cost and high efficiency. In this paper, the requirements and design of the ground station that has been developed are examined.

Determination of the Ground Station Locations for both Dual-Site Ranging and Site-Diversity at Q/V-band Satellite Communication for an Intersatellite System Scenario

  • Yilmaz, Umit C.;Cavdar, Ismail H.
    • International Journal of Aeronautical and Space Sciences
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    • v.16 no.3
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    • pp.445-450
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    • 2015
  • Generally, Low Earth Orbit (LEO) satellites are used to collect image or video from earth's surface. The collected data are stored on-board and/or transmitted to the main ground station directly or via polar ground station using terrestrial line. Today, an intersatellite link between a LEO and a GEO satellite allows transmission of the collected data to the main ground station through the GEO satellite. In this study, an approach for a continuous communication starting from LEO through GEO to ground station is proposed by determining the optimum ground station locations. In doing so, diverse ground stations help to determine the GEO orbit as well. Cross-correlation of the long term daily rainfall averages are multiplied with the logarithmic correlation of the sites to calculate the joint correlation of the diverse ground station locations. The minimum values of this joint correlation yield the optimum locations of the ground stations for Q/V-band communication and satellite control operations. Results for several case studies are listed.

CONCEPTUAL DESIGN OF MONITORING AND CONTROL SUBSYSTEM FOR GNSS GROUND STATION

  • Jeong, Seong-Kyun;Kim, In-Jun;Lee, Jae-Eun;Lee, Sang-Uk;Kim, Jae-Hoon
    • Journal of Astronomy and Space Sciences
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    • v.24 no.4
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    • pp.389-396
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    • 2007
  • The Global Navigation Satellite System (GNSS) becomes more important and is applied to various systems. Recently, the Galileo navigation system is being developed in Europe. Also, other countries like China, Japan and India are developing the global/regional navigation satellite system. As various global/regional navigation satellite systems are used, the navigation ground system gets more important for using the navigation system reasonably and efficiently. According to this trend, the technology of GNSS Ground Station (GGS) is developing in many fields. The one of purposes for this study is to develop the high precision receiver for GNSS sensor station and to provide ground infrastructure for better performance services on navigation system. In this study, we consider the configuration of GNSS Ground Station and analyze function of Monitoring and Control subsystem which is a part of GNSS Ground Station. We propose Monitoring and Control subsystem which contains the navigation software for GNSS Ground System to monitor and control equipments in GNSS Ground Station, to spread the applied field of navigation system, and to provide improved navigation information to user.

Ground station Baseband Controller(GBC) Development of STSAT-2 (과학기술위성2호 관제를 위한 Ground station Baseband Controller(GBC) 개발)

  • Oh Dae-Soo;Oh Seung-Han;Park Hong-Young;Kim Kyung-Hee;Cha Won-Ho;Lim Chul-Woo
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.8
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    • pp.482-485
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    • 2005
  • STSAT-2 is first satellite which is scheduled to launch by first Korea launcher. Ground station Baseband Controller(GBC) for operating STSAT-2 is now developing. GBC control data flow path between satellite operation computers and ground station antennas and count number of received data packets among demodulated audio signals from three antennas and also set data flow path to good-receiving antenna automatically In GBC two uplink FSK modulators(1.2kbps, 9.6kbps) and six downlink FSK demodulators(9.6kbps, 38.4kbps) are embedded. STSAT-2 GBC hardware is more simpler than STSAT-1 GBC by using FPGA in which all digital logic implemented. Now test and debugging of GBC hardware and Software(FPGA Code and CBC Manager Program) is well progressing in SaTReC, KAIST. This paper introduce GBC structure, functions and test results.

Ground station Baseband Controller(GBC) Development of STSAT-2 (과학기술위성2호 관제를 위한 Ground station Baseband Controller(GBC) 개발)

  • Oh, Dae-Soo;Oh, Seung-Han;Park, Hong-Young;Kim, Kyung-Hee;Cha, Won-Ho;Lim, Chul-Woo;Ryu, Chang-Wan;Hwang, Dong-Hwan
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.116-118
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    • 2005
  • STSAT-2 is first satellite which is scheduled to launch by first Korea launcher. After launch Ground station Baseband Controller(GBC) for operating STSAT-2 is now developing. GBC control data flow path between satellite operation computers and ground station antennas. and GBC count number of received data packets among demodulated audio signals from three antennas and set data flow path to good-receiving antenna automatically. In GBC two uplink FSK modulators(1.2kbps, 9.6kbps) and six downlink FSK demodulators(9.6kbps, 38.4kbps) are embedded. STSAT-2 GBC hardware is more simpler than STSAT-1 GBC by using FPGA in which all digital logic implemented. Now test and debugging of GBC hardware and Software(FPGA Code and GBC Manager Program) is well progressing in SaTReC, KAIST. This paper introduce GBC structure, functions and test results.

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A Design of a High Power Duplexer for the Ground Station of Ku-Band Statellite Communication (Ku-Band 위성통신을 위한 지상국용 고전력 Duplexer의 설계)

  • 이동철;이용민;최진일;나극환
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 1996.06a
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    • pp.39-43
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    • 1996
  • This paper presents the designing scheme of the duplexer for ground station using rectangular waveguide. The duplexer consists of 2-channel bandpass filters having asymmetrical inductive window and inductive post obstacles, coupled with H-plane Apertured-coupled junction, and operating in the frequency ranges of 14.5∼14.8GHz and 11.7∼12.0 GHz which are the DBS up/downlink for the domestic Ku-band ground station.

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