Theos 1

THai Earth Observation System
Also called Thaichote

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General

Designation	33396 / 08049A
Launch date	1 Oct 2008
Country of origin	Thailand
Mission	Remote sensing
Perigee/Apogee	820 km, sun-synchronous
Inclination	98.8°
Period	101 min
Launch vehicle	Dnepr #12

Remote sensing satellite program operated by Thai Ministry of Science and Technology's Space Agency GISTDA (Geo-Informatics and Space Technology Development Agency). To be used for both civilian and military purposes. Will provide imaging of any part of Thailand within 2 days.

A contract was signed in Jul 2004 with EADS for one satellite and launch + the ground segment + inclusion of Thai enginners in the development team. Worth EUR 130 million ($161.7 million). EADS's AstroSat product line will be used.

sat-index articles

Technical data

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Specifications

Prime contractor	Astrium
Platform	AstroSat
Mass at launch	744 kg
Mass in orbit
Dimension
Solar array
Stabilization	3-axis
DC power	800 W
Design lifetime	5 years

Has 2 cameras. Will provide 2 m resolution in panchromatic mode. In multispectral mode, the resolution will be 15 m with a 90 km swath width (4 bands in 450-900 nm range).

Downlink at 2209.4 & 2212.6 MHz

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