BackForward Satellite: THEOS-1 

Satellite details
Acronym THEOS-1
Full name Thailand Earth Observation System - 1
WIGOS Station Identifier ---
Satellite Description
  • 1st flight unit of the THEOS programme.
  • Main mission: high-resolution land observation.
Mass at launch 750 kg Dry mass 670 kg
Power 840 W
Data access link no link provided
Data access information
  • Data available from GISTA.
Orbit Sunsynchronous orbit Altitude 822 km
ECT 10:00 desc


Space agency GISTDA
Status Operational
Details on Status
(as available)
  • Loss of Inertial Reference Unit-A. Switched to unit-B.
Launch 01 Oct 2008 EOL ≥2025
Last update: 2023-07-17
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on THEOS-1

Acronym Full name
MS Multispectral imager
PAN Panchromatic Imager
Show instrument status and calibration
Satellite frequencies for Earth Observation, data transfer and platform communications and control
Frequencies for satellite management
Service Direction Frequency (MHz) Emission designator Bandwidth (kHz) Polarisation D/A Data rate (kbps) or Baseband (kHz) Comments
TC E-S 2035.9625 MHz 8K00G1D 8 kHz RHCP&LHCP D 4  kbps Telecommand
TM S-E 2211 MHz 800KG7D 800 kHz - D 400  kbps Telemetry and ranging
Frequencies for scientific data acquisition and communication services at ground stations
Service Direction Frequency (MHz) Bandwidth (kHz) Polarisation D/A Data rate (kbps) or Baseband (kHz) Comments
IMAGER S-E 8140 MHz 120000 kHz RHCP D 120000  kbps Earth Observation Image Data (PAN/MS)