A Synthetic Aperture Radar (SAR) system operates at a center frequency of 1,275 GHz and uses pulse signals with a bandwidth of 15 MHz. The Radar is on a satellite platform at an altitude of 568 km and is moving at a speed of 6.8 km/h. The system has an antenna measuring 11.9 m (horizontal) to 2.4 m (vertical). The antenna is oriented to the Earth in such a way that it produces an angle of arrival (with the ground floor plane) of 38.5 degrees on the Central Ground surface of its own pattern.

a) find the antenna footprint size (both range and cross-range) on the ground. Also, find a projection of the platform distance on the ground floor with the antenna-footprint Center.

b) find the range and cross-range resolutions to be obtained on the ground with the original antenna of the radar (a true Aperture Radar).

c) if this radar is to be used as a synthetic aperture radar, select the maximum PRF value that can be used to achieve an acceptable precise (unnambigious) range.

d) if a 1.6 kHz PRF is selected, how far does the platform go in a pulse repetition range (PRI)?

e) this SAR system process uses data collected in a period of 1.7 seconds to calculate focus. How many strokes does this amount to? How large is the range of synthetic openings created by this process? Does this synthetic aperture size meet the requirements of holding a point within the antenna footprint during signal integration?