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GNSS All-time Monitoring System   Dual System Integration Technology

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■ Necessity of Sat. Navigation Monitoring System
   • Monitoring the various error signals by orbit allocation, delay through atmosphere layer multi path, cycle
       slip etc
   • Signal error correction and integrity monitoring system provide the secure operation of satellite
        navigation enhance the governmental service efficency for people


■ Monitoring Core Function
   • Store and Analyse the error signals from the multi satelites by tracking system
   • Monitoring the satellite status by detection the Multi-path signal error using the technology of multi
        corelation detection
   • The unique multi capability of All-time Signal Monitoring of GPS, GLONASS, GALILEO and COMPASS
        monitoring signal environment of atmosphere layer and signal over the Korea peninsula


■ Navigation Satellite Signal receiver and Analyser
   • Receiving all satellite signals and precision tracking for incorrect error signal
   • Receiving all signal from GPS, GLONASS, Galileo
   • Signal Processing for MSAS Satellite System
   • RF-Signal Spectrum Analyzer(Jamming detection)
   • Multi-channel VSG-VSA
   • Signal data anaysis processing
   • GPS Multi-Corelator
   • Tracking antenna signal control
   • To be add Galileo Information, COMPASS & QZSS
   • Dual operation of SBAS signal monitoring


■ Navigation Satellite Signal Monitoring Equipment
   • Signal Integrity algorithm processing
   • RF base information analysis processing
   • Transmitting satellite signals by integrity signal monitoring processor
   • Dual operation with methodological equipment
   • Multiple correlation information analyer
   • RF interface monitoring equipment signal distributer of RF receiving signals
   • Correlation data analysis of GPS Signal
   • Transmition the monitoring data surrounding Interface signal Information
   • Receiving RF data in emergency case
   • Storage of GPS RF signal data in several minutes
   • Analysis S/W for GNSS error source identification


■ Reference Station of Satellite Navigation
   • DGNSS signal correction service
   • Dual operation with other reference station
   • Information processing satellite signals and monitoring data
   • Coordinated monitoring alarm with relation of other satellites
      - Plan to enhance monitoring for GBAS, ADS-B, MLAT, SBAS
   • Generation of error correction message for each satellite
     - Marine RTCM message
     - Aeronautical RTCA message
     - Geo-Measurement RTK message
   • Multi-Channel Beacon RSIM Receivers
     - Monitoring of corelate error correction for marine Ref. Station

① Receiving and Analyzing Subsystem of GNSS Signal
    The first function of this subsystem is to transmit the input signal of the integrated GNSS antenna to the network server and the second function is to analyze the received signals from GPS, GLONASS and MSAS.

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② GNSS Signal Monitoring Subsystem
    • The information obtained from GNSS receiving and analyzing subsystem is transmitted to integrity signal monitoring equipment which make the updated results with related meteorological data. Also another analyzing equipment of multi-information and RF signal monitoring equipment transmit the results after analyzing the related data and monitoring the surrounded influence data. In case of problem, the data is stored during several minutes or a couple of ten minute to allow the SDR analysis base after decentralizing the GPS RF signals obtained by the RF data receiving equipment.

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③ GNSS Reference Station
This facility receiver the information from signal receiver or GNSS and analyzer of signal monitoring equipment then generates the corrected error signals of each satellite.
   • Corrected information generates RTCM message for marine, RTCA message for aerospace and geometry
        message for RTK.
   • This facility is tested and qualified by the correlated beacon receiver.

 
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④ View of GNSS monitoring Station

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⑤ View of Integrated Antenna Pillar

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