P-15 radar

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P-15 Radar
P-15 Flat Face A at Nellis AFB
Country of originFlag of the Soviet Union.svg  Soviet Union
TypeSurveillance/Target Acquisition
Range150 km
Altitude3 km
Diameter11 meters
Azimuth 360 degrees
Elevation2-14 degrees
Precision0.3 km range
Power270 kW

The P-15"Tropa" (Russian : "Тропа"; English: "trail") or 1RL13 (also referred to by the NATO reporting name "Flat Face A" in the west) is a 2D UHF radar developed and operated by the former Soviet Union.



In 1952 SRI-244 started development of what become the P-15 early warning radar; by 1955, the radar had passed state trials and was accepted into service with the anti-aircraft troops of the Soviet armed forces. [1] The P-15 was designed to detect aircraft flying at low altitude and came to be associated with the S-125 "Neva" anti-aircraft system (NATO reporting name SA-3 "Goa"), though it was later replaced by the P-15M2 "Squat Eye" radar which mounted a single radar antenna on a 20-30 meter mast to improve coverage. [2]

In 1959, the modernised P-15M "trail" radar passed through the state test program, the modernisation replacing outdated mercury-based electronics. In 1962, another modernisation of the P-15 passed through trials as the P-15N, the radar being developed and produced by the Ulyanovsk Mechanical Plant. [1] The P-15N introduced a more sensitive receiver, which improved the detection range and a new amplifier for the transmitter. Further improvements were made in 1970 when the P-15MN passed trials. The P-15MN included a pulse coherent Doppler filter (moving target indicator) to remove passive clutter (by up to 50 dB), [1] the first such radar in the Soviet Union. [3] Finally by 1974, the modernisation of the P-15 was so extensive that it resulted in a new designation, the P-19 "Danube", also known as the 1RL134. The P-19 is known in the west as the Flat Face B.


P-15 Radar 03-Mobile radar Danuta-LMW.jpg
P-15 Radar

The P-15 is a high mobility radar. With the antenna mounted directly on the single truck (Zil-157) used for transport, the system could be deployed and taken down in no more than 10 minutes. [4] The P-15 uses two open frame elliptical parabolic antenna accomplishing both transmission and reception, each antenna being fed by a single antenna feed. [5] The radar can rapidly shift its frequency to one of four pre-set frequencies to avoid active interference, with passive interference being removed by a coherent doppler filter. [1] Azimuth was determined by mechanical scanning with an associated accompanying PRV-11 (NATO reporting name "Side Net") used to determine elevation. [2] A secondary radar for IFF is generally used in conjunction with the P-15, generally the 1L22 "Parol". [5]


The P-15 was operated by the Soviet Union from 1955. It has since become obsolete, but it was passed down to successor states after the fall of the Soviet Union. It has been largely superseded by its successor the P-19.

See also

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The "Pegmantit 8" or P-8 was an early 2D VHF radar developed and operated by the former Soviet Union.

P-12 radar

The P-12 "Yenisei" was an early VHF developed and operated by the former Soviet Union.

P-18 radar

The P-18 or 1RL131Terek is a 2D VHF radar developed and operated by the former Soviet Union.

P-14 radar

The P-14 is a 2D VHF radar that was developed and operated by the Soviet Union.

P-40 radar

The P-40"Armour" or 1S12 is a 3-D UHF radar developed and operated by the former Soviet Union.

The P-70 or "Lena-M" was a static 2D VHF radar developed and operated by the former Soviet Union.

P-19 radar

The P-19"Danube"1RL134 is a 2D UHF radar developed and operated by the former Soviet Union. The radar was also known by the name "Renata" in Poland and "Dunai" in the former German Democratic Republic.

The P-30"Khrustal" also referred to by the NATO reporting name "Big Mesh" in the west is a 2D E band/F band radar developed and operated by the former Soviet Union.

The P-20"Periskop" also referred to by the NATO reporting name "Bar Lock" in the west is a 2D E band/F band radar developed and operated by the former Soviet Union.

P-35 radar

The P-35 also referred to by the NATO reporting name "Bar Lock" in the west is a 2D E band/F band radar developed and operated by the former Soviet Union.

This is an overview of Russian early warning radars for air surveillance, and related design bureaus.


  1. 1 2 3 4 РЛС П-15 "ТРОПА" (in Russian). pvo.guns.ru. 2000-08-07. Retrieved 2009-01-06.
  2. 1 2 "P-15 FLAT FACE". Global Security. 2000–2009. Retrieved 2009-01-06.
  3. V.S. Chernyak, I. Ya. Immoreev and B.M. Vovshin (2003). "Radar in the Soviet Union and Russia: A Brief Historical Outline". IEEE Aerospace and Electronic Systems Magazine (December): 8–12.
  4. Christian Wolff (2008). "P- 15 "Flat Face A"" . Retrieved 2009-01-06.
  5. 1 2 "P-19 series early warning radar (Czech Republic), LAND-BASED AIR DEFENCE RADARS". Jane's Radar and Electronic Warfare Systems. 2008-03-03. Retrieved 2009-01-06.[ dead link ]