Foliage Penetration SAR FOPEN SAR Brandon Ravenscroft Camp

Foliage Penetration SAR (FOPEN SAR) Brandon Ravenscroft

Camp Sentinel II Radar System [4] -Installed outside US Army Camp in Vietnam in 1968. -Antenna Dimensions: 3. 5 m diameter x 1 m tall antenna. -2 k. W tube transmitter, 2 km range. - Weight: 8, 000 pounds. Source: [4] M-FOPEN Radar System [3] -Frequency: 140 MHz -Antenna Gain: 9 d. Bi -Transmit Power: 50 W -Antenna Beamwidth: 45 deg -Pulse Width: 100 ns -Polarization: Horizontal -PRF: 15 k. Hz -Detection: Kalmus Filter -Receiver: Homodyne for Doppler. Source: [5]

• Altitude: 2. 5 km • Velocity: 90 m/s • Frequency: 30. 25 and 60. 50 MHz • Bandwidth: 5 MHz • Antenna: folded dual dipole w/ coincident phase centers • Polarization: horizontal • Average Power: 5 -10 W • Pulse Width: 3. 0 µsec • PRF: 750 Hz • Range Resolution: 30 m • Cross-Range Resolution: 30 m • Swath Width: 3. 2 km • Slant Range: 6. 5 km • Flown on C-121 Test Aircraft • Real time strip-map processor Source: [6]

Vehicles Under Foliage Source: [3]

Cross - Range Resolution:

• • • • Altitude: 7. 5 km Velocity: 135 m/s Frequency: 215 – 730 MHz BW: 515 MHz Polarization: HH, VV, HV Waveform: Notched LFM Peak Power: 1 k. W Pulse Width: 26. 3 µs PRF: 500 -1200 Hz Range Resolution: 33 cm Cross-Range Resolution: 66 cm Slant Range: 6. 24 km Swath Width: 929 m Platform: Navy P-3 C aircraft Antenna: 1 m 2 • • • Developed by Naval Air Development Center Flew from 1995 to 2000, collected data in NC, CA, MI Center Frequency: 470 MHz Integration Angle: 31. 7 degrees Image formation: Range Migration Algorithm (RMA)

Source: [7]