7. Instrument Specifications
The GPRI-II instrument specifications are as follows:
Frequency Range
17.1 to 17.3 GHz
Antenna Pattern
0.5 deg 3 dB azimuth beamwidth
35 deg. 3 dB beamwidth Elevation
Peak sidelobes: -15 dB sidelobes (1-way)
Radar type
FM-CW, chirps between 0.25 and 8 milliseconds
Radar operational range
10 m →10 km
System Clock
100 MHz low phase-noise temperature-controlled
crystal oscillator DOXCO (Jackson Firefly IIa)
Transmit Power at the antenna
<100 mW (+20 dBm)
Chirp Bandwidth
200 MHz maximum (programmable)
Range resolution
1.0 meters with 200 MHz chirp and Kaiser
window weighting
Azimuth resolution (-3 dB)
8m @1 km, proportional to slant range
Analog to Digital conversion
14-bits, dual channel, 6.25 MHz sample clock
Estimated Power Consumption
Max: 65 W, 110 – 220VAC , or 24 VDC
Computer type and OS
Kontron KTGM45/mITX Computer, Intel T9600
Dual-Core CPU, 4 GB RAM, 500 GB Disk, Linux
Ubuntu LTS OS.
Azimuth Scan time
20 sec for a 180 deg sweep
Radar Mass
Tower ~8kg, RF electronics ~4 kg, scanner 10 kg,
Controller/Power ~14 kg, Antennas 2.7 kg each.
Radar Dimensions
Tower: 80x28x28 cm
RF assembly: ~ 30x26x6cm
Controller/Power: ~52x42x30cm
Antennas: 210x12.5x12.5 cm
