Sources include land based sensors, airborne sensors and satellite sensors.
The Pakistan Remote Sensing Satellite (PRS), commercially known as Remote Sensing Satellite System (RSSS) is a dual purpose Earth observational and optical satellite which is schedule to launch in 2014 for the replacement of Badr-II satellite.
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Kwangmyŏngsŏng-3 Unit 2, an Earth observation satellite launched by North Korea on 12 December 2012