Page 337 - Radar Technology Encyclopedia

327 radar, air-route-surveillance (ARSR) radar, artillery and mortar location

Figure R10 ARSR-4 radar antenna (from Skolnik, 1990, Figure R11 ASR-23SS radar antenna (Raytheon Company
Fig. 6.18, p. 6.22). photo).

and missiles operating within the troposphere and strato-
sphere. Civilian uses are primarily for air traffic control
Table R3
(ATC), while military uses include early warning, target
Major Parameters of ATCR-22 and ASR-23SS
acquisition, and ground-controlled intercept (GCI) as well as
ATCR- ATC for military airfields, aircraft carriers, and their
Parameter Units ASR-23SS
22 approaches. In some cases, joint civil and military needs are
served by the same ASR or ARSR. DKB
Frequency band L L Ref.: IEEE (1993), p. 1,176.
1) 2)
Peak power kW 2,000 21 , 40 An air surveillance radar is “a search radar used to maintain
cognizance of selected [air] traffic within a selected area,
Pulse width m s 3 1.0, 100
such as an airport terminal or en route area.” It is normally
Pulse repetition Hz 420 aver- 302 3) understood that maintaining cognizance includes the function
frequency age of forming and maintaining track files on detected targets.
DKB
1)
Average power kW 2.5 0.7 , 1.2 2)
Ref.: IEEE (1993), p. 1315; Skolnik (1980), pp. 536–541.
Antenna gain dB 36.5 36.0 An air traffic control (ATC) radar is a surveillance radar
used to provide aircraft position data to controllers at airports
Azimuth beamwidth deg 1.2° 1.25°
or regional control centers. Both primary and secondary sur-
2 2
Elevation beamwidth deg 4° , csc 4° , csc to 45° veillance radars (SSRs) are used for ATC, with the SSR serv-
to 45° ing as the primary source of data. (See airport surveillance
radar; air route surveillance radar; secondary surveil-
3)
Scan rate rpm 6 5
lance radar.) DKB
Receiving noise tem- K 649 All-around-looking radar is the translation of a term used in
perature
Russian literature, referring to a search radar having 360° azi-
1) 2) muth scan. DKB
Detection range on km 385 290 , 340
2
2m , 80% An artillery fire control radar is one designed for determi-
1) 2) nation of target coordinates and projectile impact points with
Notes: 8-module transmitter; 16-module transmitter,
3) the target. They have high range and angular coordinate reso-
average for 370-km instrumented range
lution and may be used for fire control against aerial,
ground-based, or sea targets. As a rule, these are automatic
An air(craft) search radar is one “used primarily for detec-
radars. (See also gunfire control radar.) AIL
tion of [airborne] targets in a particular volume of interest.”
Ref.: Popov (1980), p. 343; Friedman (1981), pp. 54–58, 172–184; Mac-
Note that ability to measure target position and to form track
fadzean (1992), Ch. 4.
files is not a necessary feature of search radar, while it is
assumed for a surveillance radar. Targets for air search radar An artillery and mortar location radar is a ground-based,
are understood to include conventional aircraft, helicopters, tactical battlefield radar used for locating the source (origin)