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PALSAR Phased Array type L-band Synthetic Aperture Radar ((ALOS, JAXA)
PAMELA AntiMatter Exploration and Light-nuclei Astrophysics
PATMOS AVHRR Pathfinder Atmosphere (NOAA)
PC Personal Computer
PMW Passive Microwave
POEM Polar-orbiting Earth Observation Mission (ESA)
POES Polar-orbiting Operational Environmental Satellite (USA)
PR Precipitation Radar (on TRMM, JAXA)
PRC People’s Republic of China
PRISM Panchromatic Remote-sensing Instrument for Stereo Mapping (ALOS, JAXA)
PROBA Project for On-Board Autonomy (ESA EO satellite)
PTT Post Telegraph and Telecommunications authority
PTWC Pacific Tsunami Warning Centre