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05-04-2017, 06:08 PM

stratellite ppt abstract

jaseela123d · 13-04-2017, 02:35 PM

Stratellite is a registered trademark of Sanswire for a future emission-free and high altitude stratospheric dirigible that provides a stationary communications platform for various types of wireless signals usually carried by communications towers or satellites. The Stratellite is a concept that has undergone several years of research and development, and which is not yet commercially available; Sanswire, with its partner TAO Technologies, anticipates its current sequence of tests to include the launch of a Stratellite in the stratosphere.

A Stratellite is a rigidly framed dirigible that sits in a fixed position in the lower stratosphere and carries one or more repeaters to create wireless communication networks. Stratellites, classified as unmanned aerial vehicles (UAVs) and high altitude aircraft (HAAs), are the creation of Bob Jones, a former NASA scientist. Other companies have proposed similar aircraft, including Advanced Technologies Group, SkyLINK and SkyTower.

A system of such balloons, held in position by six integrated GPS units connected to the ship's engines, was proposed by Sanswire Technologies in a joint venture with Globetel Wireless. Each Stratellite would be able to provide cellular telephony and Internet communications from an altitude of 13 miles. The wireless network created by a single Stratellite will cover an approximately circular geographic area of 125,000 square miles. Sanswire believes that only about fourteen Stratellites would create a radius of coverage around the continental United States.

The technological characteristics of Stratellites are similar to those of low earth orbit (LEO) satellite systems. In particular, low altitude will result in low latency. Users of a Stratellite network will experience a significantly reduced delay compared to low-orbiting satellites and much better latency for geostationary satellites.

The proposed commercial version of the aircraft is 100 feet. The rigid frame, made of advanced composite materials, will measure 245 feet in length and fill the nearly 1.3 million cubic feet of volume with a mixture of helium and nitrogen. According to Sanswire, at that scale a Stratellite would be able to carry up to a 5000-lb. Payload at 8,000 feet for 10-16 hours of continuous operation.

Stratellites depend entirely on thin film PV (PV) panels for propulsion, making them ideal for rapid deployment in areas with damaged or non-existent energy infrastructures such as battlefields or developing countries. Sanswire also uses a super-light insulation that claims to be 38 times more effective than the best fiberglass, based on advanced materials that are encapsulated in film.

In the US, the development of HAA is being jointly sponsored by the Department of Defense and the Department of Homeland Security (DHS) under several million dollars programs intended for the delivery of a commercial prototype In the period 2008-2011.

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