PROBA

PROBA (Project for On-Board Autonomy), renamed PROBA-1, is a Belgian satellite launched atop an Indian Polar Satellite Launch Vehicle by ISRO on 22 October 2001. The satellite was funded through the ESA's MicroSat program.[1] This small (60×60×80 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.

PROBA-1
NamesPROBA, PROBA-1
Mission typeExperimental, Earth Observation
OperatorESA
COSPAR ID2001-049B
SATCAT no.26958
Websiteesa.int/Our_Activities/Observing_the_Earth/Proba-1
Mission durationElapsed: 18 years, 9 months, 24 days
Spacecraft properties
BusPROBA
ManufacturerQinetiQ Space (previously Verhaert Space)
Launch mass94 kilograms (207 lb)
Dry mass94 kilograms (207 lb)
Dimensions0.6 by 0.6 by 0.8 metres (2 ft 0 in × 2 ft 0 in × 2 ft 7 in)
Power90 W
Start of mission
Launch date04:53, October 22, 2001 (UTC) (2001-10-22T04:53Z)
RocketPSLV
Launch siteSriharikota FLP
ContractorISRO
Orbital parameters
Reference systemGeocentric
RegimeSun-synchronous
Eccentricity0.008866
Perigee altitude553 kilometres (344 mi)
Apogee altitude677 kilometres (421 mi)
Inclination97.9 degrees
Period97 minutes
Epoch22 October 2001 00:53:00 UTC
 

With an initial lifetime of 1 to 2 years, the satellite celebrated its 16th year of operations in 2017. On 9 March 2018, it surpassed ERS-2 as ESA's longest operated Earth observation mission of all time.[2]

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.

gollark: You know it's equal to x-1 times a cubic of some sort, and you want to know exactly what cubic.
gollark: If you multiply the `(x-1)` by `(ax^3+bx^2+cx+d)` it should expand out into having an x^4 term.
gollark: I'm probably explaining this badly, hmmm.
gollark: Then set the x^4/x^3/x^2/x^1 coefficients and constant terms on each side to be equal and work out a/b/c/d.
gollark: Set it equal to `(x-1)(ax^3+bx^2+cx+d)` (the thing you know it's divisible by times the generalized cubic thingy), and expand that out/simplify.

See also
  • Miniaturized satellite

References
  1. "PROBA-1 - Overview". www.esa.int. ESA. 11 December 2012. Retrieved 11 March 2018.
  2. "Proba-1 sets new record". www.esa.int. ESA. 8 March 2018. Retrieved 11 March 2018.


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