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Title: Proba  
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Subject: European Space Agency, Proba-V, Proba-3, Technology Experiment Satellite, Proba
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Mission type Experimental
Operator ESA
COSPAR ID 2001-049B
SATCAT № 26958
Spacecraft properties
Launch mass 94 kilograms (207 lb)
Start of mission
Launch date 22 October 2001, 04:53 (2001-10-22T04:53Z) UTC
Rocket PSLV
Launch site Sriharikota FLP
Orbital parameters
Reference system Geocentric
Regime Sun-synchronous
Eccentricity 0.008866009302437305
Perigee 553 kilometres (344 mi)
Apogee 677 kilometres (421 mi)
Inclination 97.9 degrees
Period 97 minutes

PROBA (Project for On-Board Autonomy) was a Belgian satellite launched atop an Indian Polar Satellite Launch Vehicle by ISRO in 2001. The satellite was funded through the ESA's MicroSat program. This small (40×60×80 cm; 95 kg) boxlike system, with solar panel collectors on its surface, has remarkable image-making qualities. It hosts two Earth Observation instruments dubbed CHRIS and HRC. It is a hyperspectral system (200 narrow bands) that image at 30 m, plus three in the visible that have 15 m resolution.

The second satellite in the Proba-series, Proba-2 was launched on November 2, 2009, together with the SMOS mission. Further planned satellites in the Proba series are the formation flight Proba-3 and Proba-V (Proba Vegetation). They are on-going developments without defined launch dates.

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