THEOS-1

THEOS-1, also called Thaichote, is Thailand's first national Earth-observation satellite.^[1][2] It launched on 2008-10-01 on Dnepr from Dombarovskiy/Yasny into Sun-synchronous low Earth orbit at about 822-826 km altitude and about 98 degrees inclination.^[1][2] The mission uses an AstroSat-500-class spacecraft and carries panchromatic and multispectral optical imaging payloads.^[1][3] The panchromatic channel provides 2 m imagery over a 22 km swath, while the multispectral channel provides 15 m imagery over a 90 km swath.^[1][2] Application areas include agriculture, forestry, water, urban planning, disaster response, mapping, and oil-spill monitoring.^[1]