{"id":41,"date":"2013-07-22T04:57:00","date_gmt":"2013-07-22T04:57:00","guid":{"rendered":"https:\/\/www.mapsofindia.com\/on-this-day\/july-22nd-1981-indias-first-geo-stationary-satellite-apple-starts-functioning\/"},"modified":"2013-07-22T04:57:00","modified_gmt":"2013-07-22T04:57:00","slug":"july-22nd-1981-indias-first-geo-stationary-satellite-apple-starts-functioning","status":"publish","type":"post","link":"https:\/\/www.mapsofindia.com\/on-this-day\/july-22nd-1981-indias-first-geo-stationary-satellite-apple-starts-functioning","title":{"rendered":"July 22nd 1981: India&#8217;s First Geo-Stationary Satellite APPLE Starts Functioning"},"content":{"rendered":"<p><span style=\"font-size: medium;\">\u00a0\ufeff<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">On July 22<sup>nd<\/sup> 1981, India\u2019s first geo-stationary satellite APPLE started functioning.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">The Ariane Passenger PayLoad Experiment (APPLE), an experimental communication satellite was launched by the Indian Space Research Organisation (ISRO) on July 19<sup>th<\/sup> 1981, which began functioning on July 22<sup>nd<\/sup> of the same year. APPLE was an experimental communications satellite with a C-Band transponder. This satellite was launched by Ariane, a launch vehicle of the European Space Agency in French Guiana. The successful launch of APPLE was a major milestone for India\u2019s space program. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">After having successfully placed the APPLE spacecraft in the three axis stabilized mode in the geostationary orbit, India joined the league of nations who had developed their own three axis stabilized stationary communications satellite. APPLE had a launch weight of 673 kgs and a cylindrical structure of 1200 mm diameter and a height of 1985 mm. On July 19<sup>th<\/sup> 1981, the satellite was placed at 102 degrees east longitude and proved to be an important landmark in Indian space research. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">APPLE was designed and developed at the ISRO Satellite Centre in Bangalore. The centre was also responsible for the management and development of the spacecraft structure, TTC, power, thermal, control and sensor system, testing, mission planning and launch. After being tested at ISRO, APPLE was sent to Tolouse in France so that compatibility tests could be carried out with METEOSAT and CAT satellites, which would be part of the payload. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">After tests were carried out in Tolouse, the satellite was transferred to Kourou, French Guiana where final tests were carried out. After this, the satellite was integrated with the Ariane launcher. The mission control was done from the Satish Dhawan Space Centre (SHAR) in Andhra Pradesh. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">This satellite was used in many experiments such as the telecast of TV programs and radio shows. Apart from that, APPLE also made possible experimentation in advanced communication technology and brought about competence in matters of design, launch and post-launch maintenance for placing and then maintaining such satellites in the geo-stationary orbit. APPLE remained in space for a little over two years, till altitude controlled fuel depletion and went out of service on September 19<sup>th<\/sup> 1983. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">The launch of APPLE was a moment of great pride for India and the first anniversary of its launch was marked by the India Postal Service issuing a commemorative stamp in its honour. <\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\"><em>Also On This Day<\/em>:<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">1678: Chhatrapati Shivaji Maharaj wins the fort of Vellore.<\/span><\/p>\n<p>\u00a0<\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">1944: The great industrialist Man Mohan Modi Seth is born at Modinagar, U.P.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">\u00a0<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: medium;\">1991: Singer Pandit Basavraj Rajguru passes away.<br \/><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0\ufeff On July 22nd 1981, India\u2019s first geo-stationary satellite APPLE started functioning. \u00a0 The Ariane Passenger PayLoad Experiment (APPLE), an experimental communication satellite was launched by the Indian Space Research Organisation (ISRO) on July 19th 1981, which began functioning on July 22nd of the same year. APPLE was an experimental communications satellite with a C-Band transponder. This satellite was launched&#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41","post","type-post","status-publish","format-standard","hentry","category-history"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>July 22nd 1981: India&#039;s First Geo-Stationary Satellite APPLE Starts Functioning -<\/title>\n<meta name=\"description\" content=\"- July 22nd 1981: India&#039;s First Geo-Stationary Satellite APPLE Starts Functioning\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mapsofindia.com\/on-this-day\/july-22nd-1981-indias-first-geo-stationary-satellite-apple-starts-functioning\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"July 22nd 1981: India&#039;s First Geo-Stationary Satellite APPLE Starts Functioning -\" \/>\n<meta property=\"og:description\" content=\"- July 22nd 1981: India&#039;s First Geo-Stationary Satellite APPLE Starts Functioning\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mapsofindia.com\/on-this-day\/july-22nd-1981-indias-first-geo-stationary-satellite-apple-starts-functioning\" \/>\n<meta property=\"og:site_name\" content=\"What Happened on This Day in History - 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