LADOGA APOI is intended for digital processing of radar data being simultaneously delivered from PSR and SSR for combining PSR and SSR data and transmitting of the outgoing messages via serial communication lines into the automated air traffic control system.

Short description

LADOGA APOI consists of:

• APOI processing unit providing radar data reception, conversion, plot extracting (and post processing), forming the outgoing messages for users of navigation information;
• Maintenance terminal (based on PC-compatible computer), providing remote monitoring of equipment operability, processing setup, reconfiguration, and also radar data displaying on ASD.

Main technical features of LADOGA APOI:

• Modular design enables equipment reconfiguration depending on users requirements;
• Digital signal processors  TMS320C6114 of Texas Instruments Co. are the kernels of processing modules;
• Logical and interface components in the processing modules are realized on Xilinx logical microcircuits (FPGA series);
• High performance multiprocessor system with a short time processing of radar data;
• Radar data processing realization without using of operating system increases system’s reliability and doesn’t require high experienced staff;
• Using of universal time system GPS/GLONASS;
• Design following «Euro mechanic» standard provides its installation into standard 19 inch cabinet;
• Can be installed in unmanned body;
• SMALL SIZE, SMALL WEIGHT AND LOW POWER CONSUMPTION;

LADOGA APOI includes two equipment sets – the main and back-up one (with the automated switching)– that provides uninterrupted round-the-clock equipment operation.

Fig 1. LADOGA general view

Each equipment set contains the following units (refer to fig 1.):

• interface unit (M1module), intended for conversion of signals of radars angle sensors, receiving information on UTC (universal coordinated time) for satellite navigation systems;
• control facility (M2 module), providing equipment monitoring and control, combination and secondary processing of radar information, received from plot extractors;
• plot extractor of PSR information (M3 module);
• plot extractor of SSR (with international RBS channel) information (M4 module);
• plot extractor of SSR (with national UVD channel) information (M5 module);
• secondary power supply (M6 module);
• GPS/GLONASS satellite navigation receiver (installed in M1 module).In addition, the unit contains a switch (M10 module) providing interface with radar data sources and users.

Each equipment module is based on 233x160x20/40 mm printed boards and having 20 mm. or 40 mm. width meets Euro standards design requirements.

Two modifications of LADOGA APOI have been designed – with a time synchronizer (system providing single coordinates and time – SCTS) and without it. SCTS provides radar data “tailoring” to UTC transmitted by GPS/GLONASS and also UTC scale forming and transmitting navigation information to users via RS-232 and RS-485 leased channels.

In 2003, preliminary, acceptance and certification tests of LADOGA APOI were successfully completed at Pulkovo airport.

In December 2003, the Interstate Aviation Committee granted two certificates (¹ 342 and ¹343) to LADOGA APOI.

Performance specifications of LADOGA APOI (accuracy and number of processed targets) are in compliance with ICAO requirements.

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