ADS-B Ground Station & Squitter

Description
Specifications

Purpose 

The ADS-B Ground Station and Squitter offered by Ansart is designed to provide surveillance of aircraft and vehicles equipped with 1090 ES ADS-B transponders, digital data processing and data distribution to ATC centres.

The ADS-B Ground Station can be used as a source of 1090ES information to build up WAM (Wide Area Multilateration) and MLAT (Multilateration) systems.

The all-weather transponder  is one of the smallest ADS-B vehicle transponders on market and has been developed for vehicle tracking. It can be combined with Ansart’s ADS-B 1090 ES Ground Station or purchased as a standalone product.

Ansart offers complete integration of the ADS-B system and its components including evaluation of the customer requirements, site analysis and adaptation of the hardware to fit any custom installation characteristics (indoor and outdoor).

The System was developed in accordance with all spectrum of requirements of the International and European Standards, Regulations, Specifications and Guidelines as a complete solution to provide coverage of surveillance areas where increased data update rate and extended flight information are required.

System capabilities and features 

  • detection of aircraft and ground vehicles equipped with 1090ES ADS-B transponders within the station’s coverage.
  • transmission of information retrieved from the 1090ES signals including position, velocity vector etc.
  • reception of information from GPS satellites and integrity monitoring.
  • reception of vertically polarized signals.
  • coverage:
    • detection range – min 370 km;
    • detection height – min 20,000 m;
    • azimuth – 0 to 360°;
    • minimum elevation – 0.5°.
  • tracking parameters:
    • number of aircraft in the coverage zone – min 300;
    • probability of data updates every 2 sec – min 0.98;
    • false alarm probability – max 0.00003.
  • receiver operating frequency – 1090 ± 1 MHz.
  • receiver sensitivity – not worse than 93 dBm.
  • data update frequency (depending on the type and position of aircraft and ground vehicles) – 1…10 sec.
  • datalogical interface with the users in accordance with the ASTERIX cat. 21 standards, including:
    • interface with automated ATC systems;
    • transmission of information over physical lines.
  • datalogical interface with the users in accordance with the ASTERIX cat. 23 standards.
  • data documenting (archiving) and playback:
    • continuous functionally independent archiving of all data transmitted to the users (for at least 1 month);
    • continuous archiving of the equipment state and operability data (for at least 1 month);
    • playback of archived data for a specified time interval, in normal, fast and slow modes.
  • interface with the operator via terminal equipment (terminal console).
  • absolute error of the target position and velocity reception time relative to the UTC – max 25 msec. (In case of synchronization loss, the time accuracy is maintained for at least 30 minutes).
  • system diagnostics and control:
    • continuous state monitoring and remote access;
    • automatic reconfiguring in case of failure of a redundant element;
    • automatic indication of the current system configuration and changes of the equipment state or mode of operation;
    • control of the system from a technical workstation.
  • link to information users over Ethernet local-area network using TCP/IP protocols;
  • possibility to use other formats (standards) for transmission of information to users different than ASTERIX format

System operation 

Reception of ADS-B radio signals is provided by the antenna system. Received signals are sent to the antenna unit installed in the equipment cabinet, where signals from each antenna are directed into two identical reception and processing channels consisting of a   and a controlling module.

The receiver assembly performs analog-to-digital conversion (demodulation) of ADS-B 1090 MHz signals. After conversion, signals are processed by the special system software.

The software decodes signal messages extracting specific data groups and generates data packages necessary for the data display and recording systems.

Additionally, the controlling modules generate data packages for other ADS-B users in the required format and send them over digital data channels.

“Hot” redundancy in the event of a failure of one of the channels in ADS-B station is provided by the presence of two identical channels for receiving and processing signals, working in parallel and generate the same output information and are completely interchangeable.

For the purposes of equipment diagnostics and system control, the receiver assembly, the control modules and antenna module. are interconnected on a dual LAN.

The software of the system runs under Oracle Linux RHEL Based OS and provides protection against unauthorized access.

System components 

  • antenna system.
  • system equipment cabinet:
    • antenna unit;
    • receiver assembly;
    • controlling module;
    • network switch;
    • terminal console;
    • ups.

Compliance  

  • Regulation (EU) 2018/1139, (EU) No 1028/2014, (EU) No 1207/2011
  • ICAO: Annex 10, Annex 11, Doc 4444, Circular 311.
  • WMO: No.8, No.49, No.731
  • EU directive: 2014/30/EU, 2014/35/EU, 2012/19/EU, 2011/65/EU
  • EUROCAE: ED-102A, ED-109, ED-126, ED-129B, ED-161, ED-163,
  • RTCA: DO-260B.
  • EUROCONTROL SUR.ET1.ST05.2000-STD-12-01, SUR.ET1.ST05.2000-STD-16-01.