Ariane Passenger Payload Experiment

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Ariane Passenger Payload Experiment
Mission type Communications
OperatorEADS Astrium
COSPAR ID 1981-057B OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 12545 OOjs UI icon edit-ltr-progressive.svg
Mission duration2 years, 3 months
Spacecraft properties
Manufacturer Flag of India.svg ISRO
Launch mass350 kilograms (770 lb)
Start of mission
Launch date19 June 1981 (1981-06-19)
Rocket Ariane 1
Launch site Kourou ELA-1
End of mission
Deactivated19 September 1983 (1983-09-20)
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude102° East
 

The Ariane Passenger PayLoad Experiment (APPLE), was an experimental communication satellite with a C-Band transponder launched by the Indian Space Research Organisation on June 19, 1981, by Ariane, a launch vehicle of the European Space Agency (ESA) from Centre Spatial Guyanais near Kourou in French Guiana.

APPLE was India's first three-axis stabilised experimental Geostationary communication satellite. On July 16, 1981, the satellite was positioned at 102° E longitude. The 672 kg [1] satellite served as testbed of the Indian telecommunications space relay infrastructure despite the failure of one solar panel to deploy. Solid-propellant based Apogee Boost Motor to circularize APPLE's orbit was derived from SLV-3 fourth stage. [2]

It was used in several communication experiments including relay of TV programmes and radio networking. It was a cylindrical spacecraft measuring 1.2 m in diameter and 1.2 m high. Its payload consisted of two 6/4 GHz transponders connected to a 0.9 m diameter parabolic antenna. It went out of service on September 19, 1983. R. M. Vasagam was the project director of APPLE during 1977-1983. [3] [4]

APPLE (Specifications)
MissionExperimental geostationary communication [5]
Weight670 kg [5]
Onboard Power210 watts [5]
Payload C-band transponders (Two) [5]
Launch DateJune 19, 1981 [5]
Launch VehicleAriane -1(V-3) [5]
OrbitGeosynchronous [5]
Mission lifeTwo years [5]

See also

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References

  1. "ISRO success stories". THE HINDU. 28 April 2001. Archived from the original on 17 October 2006. Retrieved 2013-03-17. ...This important opportunity was utilised to build indigenously a 672-kg state-of-the-art three-axis-stabilised (as against the spin-stabilised Aryabhata) geosynchronous communication satellite called APPLE – Ariane Passenger Payload Experiment – which was launched in June 1981.
  2. Raj, N. Gopal (2014-09-10). "Trusty engine on Mars Orbiter to be tested yet again". The Hindu. ISSN   0971-751X . Retrieved 2021-04-24.
  3. "Biodata RM Vasagam" (PDF). BIT Mesra. Retrieved 4 August 2020.
  4. From fishing hamlet to red planet (PDF). Harper Collins. 2015. ISBN   9789351776895. Archived from the original (PDF) on 24 April 2021.
  5. 1 2 3 4 5 6 7 8 "Welcome To ISRO :: Satellites :: Geo-Stationary Satellite :: APPLE". Isro.org. 1981-06-19. Retrieved 2013-03-17.