Variable pulse repetition frequency for the Global Precipitation Measurement Project (GPM)

Pulse patterns are designed by adopting variable pulse repetition frequency (VPRF) for space missions involving beam scans in the cross-track direction, especially intended for the Global Precipitation Measurement Project (GPM). To cope with large variance in range from a satellite, which is caused by the beam swing and the Earth oblateness, a systematic algorithm is proposed, increasing sampling rates.