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SPN-43 Shipborne Radar
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The AN/SPN-43C is a U.S. Navy air traffic control (ATC) radar for large-deck amphibious ships that are capable of supporting flight operations. These vessels include aircraft carriers (CVN) and amphibious assault ships (LHA and LHD) that predominantly carry helicopters.
U.S. homeports for ships that carry the SPN-43 are Norfolk VA, San Diego CA, Bremerton WA, and Newport News VA. The SPN-43 is currently installed on 21 commissioned ships in the U.S. Navy. It may also be installed on some non-U.S. military ships.
Land-based testing and training sites for the SPN-43 are at St. Inigoes (Pax River) MD, Pascagoula MS, and Pensacola FL, per footnote US348.
The SPN-43 possesses the following technical characteristics:
-Modulation P0N (unmodulated pulses, no information transmitted)
-Tuning range 3500-3700 MHz
-Peak tx power into antenna: 1 MW (60 dBW)
-Antenna gain: 32 dBi
-Peak EIRP: 1.6 GW (92 dBW)
-Pulse width: 0.95 microseconds
-Pulse repetition rate: 1 kHz
-Duty cycle: 0.1%
-Transmit bandwidth: 1.6 MHz
-Antenna type: Rotating parabolic
-Beamwidth: 1.75 deg horizontal, 4.4 deg vertical (vertical fan beam, csc2 to 30 deg elevation)
-Polarization: Horizontal
-Antenna rotation rate: One revolution per 4 seconds
In the range 3650-3700 MHz, operation of the radar is only allowed more than 50 miles off shore.
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Frequency Bands |
| Band | Use | Service11 | Table |
| 3500 - 3700 MHz | SPN-43 shipborne air traffic control radar | Radiolocation | F |
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