MTR-L

mtr-l

Mobile tactical radar MTR-L

Mobile radar MTR-L is intended for automatic detection of aerial objects (AO) at small, average and big altitudes, determination of target current position, locking of AO movement trajectory and AO automatic tracking. MTR-L includes surveillance primary radar channel (PRC), which uses approach of active location with passive response, and secondary radar channel (SRC), which uses approach of location with active response, that work for one common antenna.

In primary radar (PR) a complicated sounding signal consisting of smooth signal and phase-shift keyed signals of different range is used. Sequence of high-frequency sound impulses which is formed in digital signal processing block (DSPB) and PR modulator subblock intensifies in PR transmitting system and is emitted into the space by common for PR and SR mirror antenna.Reflected signals are received by the same antenna, are intensified by the PR receiving system and proceed to the DSPB, in which they transform from the analogue form into digital. All further processing (suppression of jamming of different type, extraction and detection of signals reflected from aircrafts (AC) and AC coordinate measuring (azimuth and slant range)) is implemented automatically by special algorithms.

Work of the secondary radar (SR) is based on the principle of directed emission at the request frequency (1030 MHz) of coded sending of electromagnetic energy pulses into the ambient space. The request pulses are received by the AC transponder and decoded. Through the nondirectional antenna the AC transponder emits coded sequence of electromagnetic energy pulses at the frequency of the response (1090 or 740 MHz) bearing data on number or AC altitude.  AC reply signals are received by the ASR antenna, intensified in SR receiving system and proceed to the system of data digital processing in which they transform from the analogue form into digital. Decoding of response signal is done in the DSP block by special algorithms. Decoded information received from AC is identified with the coordinate information of PR and is displayed on the AWP observation monitor.

Secondary channel provides:

  • Detection and coordinates setting of AC equipped with the transponders of UVD, RBS and Mk XA systems;
  • receipt of reply signals and acquisition of flight data from AC equipped with the transponders working in UVD mode;
  • receipt of reply signals and acquisition of flight data from AC equipped with the transponders working in modes of RBS and Mk XA systems;
  • receipt of SOS signals (conflict situation or “Emergency”).

When the reply signals are received from the PR equipped with the transponders working in ATC modes, the following information is decoded and displayed on the automatized work place:

  • AC coordinates (azimuth, range);
  • Flight information (hull No, remaining fuel, flight altitude, condition of the airborne equipment – if normal or not).

When the reply signals are received from AC equipped with the transponders of RBS and Mk XA systems, the following information is decoded and displayed:

  • AC coordinates (azimuth, range);
  • numbers of answer codes in 1, 2, 3/А modes;
  • altitude received in С mode;
  • emergency signals in 1, 2, 3/А modes;
  • I/P (Identify Position) signals in 1, 2, 3/А modes.

Data on the altitude is provided in feet or ten of meters according to the desire of the client. Side lobe suppression mode is provided both on request and on reply in the whole range of sight and azimuth angles. MTR-L fulfills the following prime functions:

  • automatic detection of aircrafts of primary and secondary radars which are part of the radar;
  • automatic position finding (azimuth and range) of AO and displaying data on the screens of automatized work places of the radar;
  • reception and displaying of information on AO according to the data of secondary radar, binding of flight data to the radar blips of AC;
  • conjugation of coordinate information of primary and secondary radars;
  • automatic tracking of AO and calculation of the parameters of their motion;
  • reception, displaying and processing of radar information from similar radar, other digital radars or from radars equipped with А-1000M extractor, and AO path generation;
  • automatic release of radar information to the external user through the communication link;
  • radar information documenting;
  • control of technical condition and examination of main radar units.

Main characteristics of primary and secondary MTR-L radar are given in the table.
Mobile radar MTR-L specifications:

  Main characteristics PR SR
1 Coverage:
– azimuth, degrees. 360 360
– range, not less than, km 150 200
– angle of evaluation, degrees. 0,5 … 28 0,5 … 28
Height max , km 12 12
– minimal range, m, not more than 2500 1500
Scanning interval, s, not more than 10 10
2 Detection area by target with RCS=2,5 m2, Р=0,5
– minimal range 1000 m 2,7 km
– maximal range 100 km 220 km
3 Mean-square error of coordinate measuring:
– range, m, not more than 150 200
– azimuth, degrees, not more than 0,4 0,2
4 Range resolution, m, not more than 230 150
5 Azimuth resolution, degrees, not more than 5 4
6 Productivity on processing and displaying of AC in the coverage area, not less than 100
7 Working frequency range, MHz 1250 … 1350,

250 frequencies with 0,4 MHz spectrum

1030 – request,

1090 – RBS reply, 740 – ATC reply

8 Transmitter pulse power, kW, not less 1,8 ± 0,2 0,8 ± 0,2
9 Types and duration of sounding signals:
– AM signal 1,5 μs request –
– PM-13 19,5 μs 0,8 μs
– PM-42 63 μs reply –
0,45 μs