Proba 1

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General

Designation	26958 / 01049B
Launch date	22 Oct 2001
Country of origin	Europe
Mission	Remote sensing
Perigee/Apogee	568/638 km
Inclination	97.9°
Period	97 min
Launch vehicle	PSLV #6

Total cost: $14.5 million. Conducts autonomous science observations on requests from Earth stations.

The higher orbit for Proba was achieved by firing the reaction control thrusters of the PSLV's fourth stage.

Still operating in 2012 after a software fix to its startracker. Still operational on its 20th birthday.

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External resources

http://www.esa.int/SPECIALS/Proba/

http://www.chris-proba.org.uk/
http://www.esa.int/estec/proba/
http://www.estec.esa.nl/wawww/ES/PROBA.html
http://members.tripod.com/~ketos/space1.html
sat-index articles

Technical data

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Specifications

Prime contractor	Verhaert Design & Development (Kruibeke, Belgium)
Platform	MiniSIL
Mass at launch	94 kg
Mass in orbit
Payload mass	25 kg
Dimension	0.8 x 0.6 x 0.6 m
Solar array
Stabilization
DC power
Design lifetime	3 years

Has a 25 m resolution spectrometer named CHRIS (Compact High resolution Imaging Spectrometer; 14 kg; designed and developed by Sira Electro-Optics of the UK), a radiation (SREM) and dust (DEBIE) detectors and 2 micro cameras (WAC (18 m resolution) and HRC (8 m resolution)).

The star tracker is said to be the first capable of adjusting for the relativistic aberration (caused by the fact that the satellite is moving)

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