Kasta 2E

Kasta 2E1

Kasta 2E1 Acquisition Radar
Country of origin	Soviet Union
Manufacturer	Almaz-Antey
Designer	VNIIRT
Introduced	1989
Type	Target acquisition
Frequency	830-882 MHz (UHF)
Beamwidth	8° (horizontal)
RPM	6-12RPM
Range	150 km (93 mi)
Altitude	6 km (3.7 mi)
Azimuth	360º
Precision	450 m (1,480 ft), 100' (1.7°)
Power	1kW (avg.) 16kW (max)
Other names	Flat Face-E, 51U6 (GRAU index), Kasta 2-1, Casta 2E1, Cyrillic: 51У6
Related	[1]

Kasta 2E2

Kasta 2E2 FCR
Country of origin	Russia
Manufacturer	Almaz-Antey
Designer	VNIIRT
Introduced	Early 2000s
Type	FCR
Frequency	UHF
Beamwidth	5.5° (horizontal)
RPM	6-12RPM
Range	150 km (93 mi)
Altitude	6 km (3.7 mi)
Azimuth	360º
Precision	100 m (330 ft), 40' (0.7°)
Power	23kW (max)
Other names	Flat Face-E, 39N6 (GRAU index), Kasta 2-2, Casta 2E2, Cyrillic: 39Н6
Related	[2]

Air defense specialists of the 150th MRD erect the Kasta 2E1

The Kasta 2E radar group (NATO reporting name "Flat Face-E") is a Russian radar group, consisting of the Kasta 2E1, Kasta 2E2 and their supporting systems. The Kasta system is designed to be the successor of the older Flat Face models, such as the P-15 and the P-19. Despite looking visually similar (similar radar reflectors) to the previous listed, Kasta has significant differences to the P-15 and P-19.

Development

The Kasta 2E was developed originally by the Soviet Union. Its primary objective is to overcome deficiencies or to satisfy the demand in low-level surveillance. Both radar types can be triggered with either equal or opposed phases. Both antenna types can optionally be mounted on a standard 50 meter pylon. This arrangement causes a displacement of the radar horizon which in turn increases the detection altitude up to 6 km at a distance of 150 km.

Systems

The Kasta 2E1 (51U6) system uses two antennas and consists of two vehicles: ^[3]

• one truck carries the antenna and its peripheral equipment
• another truck operates as command post vehicle and on a trailer unit, the external power supply is installed

The Kasta 2E2 (39N6E) system uses one antenna and consists of three vehicles: ^[4]

• one truck carries the antenna and its peripheral equipment
• another truck operates as command post vehicle
• a diesel-electric power plant is mounted another truck and two single-axle trailers carry auxiliary equipment

	Kasta 2E1	Kasta 2E2
Target detection (height 100 m) with Antenna 5.4 / 14 m	32 km	41 km
Target detection (height 100 m) with Antenna 50 m	58 km	55 km
Accuracy distance	540 m	100 m
Azimuth	100'	40'
Height	n.a.	900 m
Velocity	n.a.	2 m/s
Data processing cap.	n.a.	200 Plots
Target tracking	n.a.	50 Tracks
Max. Range of radio connection	n.a.	50 km
Moving target indication (MTI)	53 DB	54 DB
Mean time between failure (MTBF)	300 h	700 h
Setup time	20 min	20 min
Power up	3.3 min	3.3 min
Teardown	20 min	20 min
Power consumption (max)	16 kW	23 kW
Operating crew	2	2
Transport units	2	3

References

1. Wolff, Christian. "51U6 "Casta 2E1"". radartutorial.
2. Wolff, Christian. "39N6 "Casta 2E2"". radartutorial.
3. ""KASTA-2E1" (51U6)". mzrip. Archived from the original on 16 October 2013. Retrieved 2 April 2025.
4. ""KASTA-2E2" (39N6E)". mzrip. Archived from the original on 10 April 2012. Retrieved 2 April 2025.