This article is about the satellite APPLE. For the fruit apple, see Apple. For other uses see Apple (disambiguation). An Earth observation satellite, ERS 2 For other uses, see Satellite (disambiguation). ... For other uses, see Fruit (disambiguation). ... Binomial name Borkh. ... Look up apple in Wiktionary, the free dictionary. ...

The Ariane Passenger PayLoad Experiment (APPLE), was an experimental communication satellite with a C-Band transponder launched by Indian Space Research Organisation satellite on June 19, 1981 by Ariane, a launch vehicle of the European Space Agency (ESA) from Centre Spatial Guyanais near Kourou in French Guiana. It was India's first three-axis stabilised experimental Geostationary communication satellite. On July 16, 1981, the satellite was positioned at 102° E longitude. The 350 kg satellite served as testbed of the Indian telecommunications space relay infrastructure despite the failure of one solar panel to deploy. It was used in several communication experiments including relay of TV programmes and radio networking. It was a cylindrical spacecraft measuring 1.2 meters in diameter and 1.2 meter high. Its payload consisted of two 6/4 GHz transponders connected to a 0.9 meter diameter parabolic antenna. It went out of service on September 19, 1983. U.S. military MILSTAR communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications using radio at microwave frequencies. ... An Ontario Highway 407 toll transponder In telecommunication, the term transponder (short-for Transmitter-responder and sometimes abbreviated to XPDR, XPNDR or TPDR) has the following meanings: An automatic device that receives, amplifies, and retransmits a signal on a different frequency (see also broadcast translator). ... The Indian Space Research Organization (ISRO) is Indias national space agency. ... An Earth observation satellite, ERS 2 For other uses, see Satellite (disambiguation). ... is the 170th day of the year (171st in leap years) in the Gregorian calendar. ... Year 1981 (MCMLXXXI) was a common year starting on Thursday (link displays the 1981 Gregorian calendar). ... Ariane I is the first version of the Ariane launcher family. ... Rockets (including missiles) can be launched from the following: for a launch into an orbital spaceflight and beyond: a launch pad, including a floating platform (see San Marco platform, Sea Launch) for the launch into a suborbital flight also: a missile silo a mobile launcher vehicle a submarine air launch... ESA redirects here. ... The Guiana Space Centre (French: Centre Spatial Guyanais) is a French/European spaceport near Kourou in French Guiana. ... Kourou is a town and commune in French Guiana. ... In the scientific method, an experiment (Latin: ex-+-periri, of (or from) trying), is a set of actions concerning phenomena. ... A geostationary orbit (abbreviated GEO) is a circular orbit in the Earths equatorial plane, any point on which revolves about the Earth in the same direction and with the same period as the Earths rotation. ... Communication is a process that allows people to exchange information by one of several methods. ... July 16 is the 197th day (198th in leap years) of the year in the Gregorian calendar, with 168 days remaining. ... Year 1981 (MCMLXXXI) was a common year starting on Thursday (link displays the 1981 Gregorian calendar). ... Telecommunication involves the transmission of signals over a distance for the purpose of communication. ... A laundromat in California with flat-plate solar water heating collectors on its roof. ... Communication is a process that allows people to exchange information by one of several methods. ... For other uses, see Television (disambiguation). ... In aviation, the Maximum Take-Off Weight (or MTOW) is the maximum weight with which an aircraft is allowed to try to achieve flight. ... A gigahertz is a billion hertz or a thousand megahertz, a measure of frequency. ... In telecommunication, the term transponder (sometimes abbreviated to XPDR or TPDR) has the following meanings: An automatic device that receives, amplifies, and retransmits a signal on a different frequency. ... A parabola A parabola (from the Greek: παραβολή) is a conic section generated by the intersection of a cone, and a plane tangent to the cone or parallel to some plane tangent to the cone. ... A Yagi-Uda beam antenna Short Wave Curtain Antenna (Moosbrunn, Austria) A building rooftop supporting numerous dish and sectored mobile telecommunications antennas (Doncaster, Victoria, Australia) An antenna or aerial is a transducer designed to transmit or receive radio waves which are a class of electromagnetic waves. ... is the 262nd day of the year (263rd in leap years) in the Gregorian calendar. ... Year 1983 (MCMLXXXIII) was a common year starting on Saturday (link displays the 1983 Gregorian calendar). ...

External links

• Official ISRO website