THEOS-2

THEOS-2 (Thailand Earth Observation System-2), is a Thai Earth observation satellite. The satellite would be capable of observing Earth's surface with a resolution of up to 50cm, and covering about 74,000 square kilometers per day.^[1] THEOS-2 was launched by a Vega rocket from Guiana Space Centre in French Guiana on 9 October 2023.^[2][3][4]

THEOS-2

Mission type	Earth Observation
Operator	GISTDA
COSPAR ID	2023-155A
SATCAT no.	58016
Spacecraft properties
Manufacturer	Airbus Defence and Space
Start of mission
Launch date	9 October 2023
Rocket	Vega
Launch site	Guiana Space Centre
Contractor	Arianespace
Orbital parameters
Reference system	Geocentric
Regime	Sun-synchronous, LEO
Eccentricity	≈0

THEOS-2, along with the THEOS-2A Smallsat, is part of the GISTDA's Development Survey Satellite System Project (โครงการระบบดาวเทียมสำรวจเพื่อการพัฒนา).^[5][6] Following THEOS-2, Thailand intends to build the THEOS-3 satellite completely domestically.^[7]