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PROBA-1

Names	PROBA, PROBA-1
Mission type	Experimental, Earth Observation
Operator	ESA
COSPAR ID	2001-049B
SATCAT no.	26958
Website	Proba-1 applications
Mission duration	Elapsed: 23 years, 2 months, 23 days
Spacecraft properties
Bus	PROBA
Manufacturer	QinetiQ Space (previously Verhaert Space)
Launch mass	94 kg (207 lb)
Dry mass	94 kg (207 lb)
Dimensions	0.6 m × 0.6 m × 0.8 m (2 ft 0 in × 2 ft 0 in × 2 ft 7 in)
Power	90 W
Start of mission
Launch date	04:53, 22 October 2001 (UTC) (2001-10-22T04:53Z)
Rocket	PSLV C3
Launch site	Sriharikota FLP
Contractor	ISRO
Orbital parameters
Reference system	Geocentric
Regime	Sun-synchronous
Eccentricity	0.008866
Perigee altitude	553 km (344 mi)
Apogee altitude	677 km (421 mi)
Inclination	97.9 degrees
Period	97 minutes
Epoch	22 October 2001 00:53:00 UTC

PROBA (Project for On-Board Autonomy), renamed PROBA-1, is a Belgian satellite technology demonstration mission launched atop an Indian Polar Satellite Launch Vehicle by ISRO on 22 October 2001. The satellite was funded through the ESA's MicroSat and General Study Program with the objective of addressing issues regarding on-board operational autonomy of a generic satellite platform. This small (60×60×80 cm; 95 kg) boxlike system, with solar panel collectors on its surface, hosts two Earth Observation instruments dubbed CHRIS and HRC. CHRIS is a hyperspectral system (200 narrow bands) that images at 17 m resolution, while HRC is a monochromatic camera that images visible light at 5 m resolution.

With an initial lifetime of one to two years, the satellite celebrated its 20th year of operations in 2021. On 9 March 2018, it surpassed ERS-2 as ESA's longest operated Earth observation mission of all time. ESA aims to deorbit the satellite through the ClearSpace-1 mission in 2026.

Series of satellites

PROBA is also the name of the series of satellites starting with PROBA-1. The name is also used to refer to the bus of the satellites.

The second satellite in the PROBA series, PROBA-2, was launched on 2 November 2009 together with the SMOS satellite.

The third satellite to be launched was PROBA-V (PROBA-Vegetation), on 7 May 2013.

Further planned satellites in the PROBA series include the formation flying demonstration mission PROBA-3 and limb sounder ALTIUS.

See also

• Miniaturized satellite

References

1. Ramakrishnan, S.; Somanath, S.; Balakrishnan, S. S. (January 2002). "Multi-Orbit Mission by PSLV-C3 and Future Launch Opportunities". IAF Abstracts: 936. Bibcode:2002iaf..confE.936R.
2. "PSLV-C3". ISRO. 22 October 2001. Archived from the original on 25 March 2014. Retrieved 25 October 2021.
3. "PROBA-1 - Overview". ESA. 11 December 2012. Retrieved 25 October 2021.
4. "PROBA-1 (Project for On-Board Autonomy - 1)". www.eoportal.org. Retrieved 2022-12-28.
5. ^ "Proba-1 Celebrates 20th Birthday In Orbit". ESA. 22 October 2021. Retrieved 25 October 2021.
6. "Proba-1 sets new record". ESA. 8 March 2018. Retrieved 11 March 2018.
7. Werner, Debra (24 April 2024). "Major changes approved for ClearSpace-1 mission". SpaceNews. Retrieved 24 April 2024.

External links

• http://earth.esa.int/proba/ Archived 2012-01-09 at the Wayback Machine
• PROBA-1 article on eoPortal by ESA
• PROBA-2 article on eoPortal by ESA
• PROBA-3 article on eoPortal by ESA
• PROBA-V article on eoPortal by ESA
• PROBA-V plus one article on eoPortal by ESA

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• Earth observation satellites of the European Space Agency
• European Space Agency
• Spacecraft launched in 2001
• Spacecraft launched by PSLV rockets
• Technology demonstrations
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