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ARSR-3 Long-Range Search Radar Set - A long-range ground search radar set built by Westinghouse for the Federal Aviation Administration (FAA). First deployed in July 1978.

ARSR-3 Search Radar

The ARSR-3 was an long-range L-band (1215- 1400 MHz) air-route-surveillance radar built by Raytheon for the FAA. Twenty six ARSR-3s were deployed by the FAA between 1978 and FY1980. The first installation took place at the FAA Aeronautical Center in Oklahoma City in July 1978 and they delivered the last one in FY1980.

ARSR-3 Search Radar Contracts
Date Contract Sets Amount Notes
February 1973 Prototype 1 $3.5 million Final cost $7.9 milllion
July 1975 Production 16 $30.2 million
December 1975 Production 10 $11.2 million

The ARSR-3 was used as a surveillance system to detect azimuth and range of en-route aircraft operating between FAA terminal areas. The ARSR-3 was dual channeled with the ability to run both channels at the same time in a diplex mode. Each channel used a klystron that providing 5MW peak power with 3.3kW average power. When dipexed the two channels were shifted in frequency and could be staggered about a set of prfs. When optimized, the diplex mode could result in a detection range of 240 nm.

ARSR-3 Upgrades

In FY85 a contract to upgrade 64 FAA tube type en route radar sets was awarded to United Technologies/Norden Systems as the first of the modifications to improve maintainability and reduce costs.

By 1990 the FAA indicated that the ARSR-3 included the common digitizer functionality and did not require a separate CD-2 Common Digitizer. A separate modification was required to implement three level weather reporting on the ARSR-3.

Between 1996 and 1999 nine of the operational ARSR-3s were replaced with the newer ARSR-4 radars.

By 2015 all of the remaining operational ARSR-3s had been further transformed into Common Air-Route-Surveillance (CARSR) radars with 9200S Antennas and additional solid state components that would extend the supportable life of the set into 2025.

ARSR-3 Search Radar
Element Value Notes
Nomenclature ARSR-3
Variants ARSR-3A thru D
D configuration reportedly
had height-finder capability
Manufacturer Westinghouse
Type Search
Number Made 36 Total
26 FAA
7 Canada
2 Switzerland
Frequency 1250-1350MHz
PRF 310-365 Hz
Pulse Width 2 us
Rotation Speed 5 rpm
Antenna 9200S
Power 5 MW
3.5 KW
Range 240 nmi long range
Altitude 100,000
Introduced 1978
Cost per set $1.6 million approx

Known ARSR-3 Installations (edit list)
Seq Name/Location State Code Final ARTCC Notes
1 Arlington FAA Radar Site IA QJO CARSR ZAU
2 Bedford FAA Radar Site VA QBE CARSR XDC/ZTL √*
3 Binns Hall FAA Radar Site VA QBN CARSR XDC
4 Clearfield FAA Radar Site PA QCF CARSR ZOB
5 Cross City FAA Radar Site FL CTY ARSR-4 ZJX/ZMA
6 Empire FAA Radar Site MI QJA ARSR-4 ZMP √*
7 Finley FAA Radar Site ND QFI ARSR-4 ZMP √*
8 Fort Lonesome FAA Radar Site FL QJT Closed ZJX/ZMA
9 Fossil FAA Radar Site OR QVN CARSR ZSE
10 Joliet FAA Radar Site IL JOT CARSR ZAU/ZID
11 Kenai FAA Radar Site AK ZAN CARSR unk
12 Kirksville FAA Radar Site MO IRK CARSR ZKC
13 Lakeside FAA Radar Site MT QLS ARSR-4 ZLC √*
14 Lincolnton FAA Radar Site GA QNK CARSR ZTL √*
15 Mount Laguna FAA Radar Site CA QRW ARSR-4 ZLA √*
16 Nashwauk FAA Radar Site MN QJD ARSR-4 ZMP
17 Newport FAA Radar Site MS QNM CARSR ZME
18 Riverhead FAA Radar Site NY QVH ARSR-4 ZNY
19 Seligman FAA Radar Site AZ QXP CARSR ZAB/ZLA
20 Sonora FAA Radar Site TX SOA Closed ZFW/ZHU
21 The Plains FAA Radar Site VA QPL CARSR XDC
22 Mount Kaala FAA Radar Site HI QKA ARSR-4 Unk
23 FAA Academy Technical Center OK Unk ARSR-4 Unk

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