SOV - P-15 (1RL13, "Flat Face" - prehľadový RL)

P-15


In 1952 (NII-244 of the Ministry of Armaments), the development of an RL station operating in the dm band to detect low-flying targets was started under the designation TROPA P-15.
The RLS prototype (chief designer - B.P.Lebedev) successfully passed the state tests on the polygon in 1955. Since 1955, when the station was included in the armament, it was used in the radio technical units of the PVOS, Air Force, Navy and PVO of ground troops.
Three modes are used in combat operations - amplitude, amplitude with "buildup" and coherent-pulse. The station has protection against active frequency disturbances by rapidly switching to one of four operating frequencies. There is also protection against passive disturbances - ground reflectors and dipole reflectors. The station has a Kremnij-2 type ground interrogator. The station is mounted on a ZIL - 157 chassis.
The station is capable of detecting a fighter-type target at a flight altitude of 500-3000m at a range of 60-140 km. The pulse power of the transmitter is 300 kW. The width of the radiation pattern in azimuth is 4.5'.
In 1959, tests of an upgraded version of the P-15M were carried out on the polygon. The automatic and semi-automatic target acquisition modes were added, the moving target selection system was modernized, and apparatus for communication with the VOZDUCH-1P system was added.
The Ulyanovsk Mechanical Plant carried out further modernization, and in 1962 state tests of the P-15N station were conducted. The apparatus was modified and additional functional blocks were introduced to improve the technical and operational characteristics - especially the efficiency of the moving target selection system.
In 1963, parametric high-frequency amplifiers were tested in the apparatus at the Donguz polygon (cooperation between the Ulyanovsk Mech. Plant and the N.E. Bauman Moscow Technical University). The distance of the findings by this modernization (increase of receiver sensitivity) increased by 14%. The phasing mode of the coherent oscillator using echo signals was introduced. Parametric amplifiers were unreliable and thermally unstable and required improvement.
A further upgrade of the P-15MN was tested on the polygon in 1970. To protect against anti-radar missiles, the apparatus was supplemented with a "MERCANIJA" block (perhaps Czech for MIHOTANÍ...), a redesigned ground interrogator, and a fundamentally redesigned moving target selection system.
In this period (1970s) the apparatus was redesigned on a new component base, the ground interrogator was used more modern in the Kremnij-2M system. The result of this modernization was a new station P-19 DUNAJ, 1RL134, which was accepted into the armament in 1974.


Note - please add, especially technical parameters and comments of those who served on this legend......


grammatically corrected by Hanyz 7.7.2009

Tactical-technical data:


Frequency: 830 MHz
Pulse Power: 270 kW
Repetition rate: 500-680 Hz
Antenna speed: 6 rpm
Distance measurement error: up to 2000 m
Bearing error: up to 2°
Radar range on target;
at 500 m: 65-70 km
at 4000 m: 150-180 km
at 5000 m: 190 km
weight: 9150 km
Length: 7300 mm
Width: 3100 mm
Height: 3900 mm


The radar has two power packs, one located in the superstructure and the other ťmounted on the trailer. On the trailer, the elements of the antenna are placed in a convenient way.
Trailer mass: 2100 kg
Trailer with power plant: TAPZ-755B or 1-AP-1,5 B

In the museum in Rokycany there is this RL rangefinder, some photos follow.

Photo

Photo

Serbian P-15, the picture may have come from Kosovo.

P-15 from CSLA armament, first half of 1960s (VPZ is retouched).

P-15 in "action" and transport position.
Photo from the event Cihelna 2007, 18.8.2007.

One shot of the radar with the trailer in marching position and a few pictures of the trailer itself.

As mentioned above, the device has two power plants. Both of them are petrol, type AB-8-0/230/C-425.

...

just a little addendum.....
the radar with UNZA antenna on a high mast was able to detect targets flying at negative altitude, such as helicopters or fighter jets in low-level flight, but also fast moving cars, e.g. on the Bratislava Malacky highway

Where was the NRZ equipment of the Kremnyj-2 system located and where was its antenna(s) located?

The NRZ stand is at the front right of the antenna next to the front door. Its antennas are right on the radiators, with those coaxial cables leading to them. There were 2 kóds plugged into the NRZ cabinets on a schedule. One was for the transmitter, the other for the simulator. The latter had a small hinged antenna (omnidirectional) above the back door. The NRZ control was either a pedal to irradiate a specific target or it could be turned on permanently.