RezwanAhmed & His Team || Software Engineer

Posts tagged “Internet

Fast, cheap Internet Satellites Launched

On the last Tuesday (25 June, 2013), The first four of 12 satellites in a new constellation to provide affordable, high-speed Internet to people in nearly 180 “under-connected” countries were blasted into Space.

The orbiters, part of a project dubbed O3b, for the “other 3 billion” people with restricted Internet access, were lifted by a Russian Soyuz rocket from Kourou in French Guiana at 1927 GMT, according to a live broadcast on the website of launch company Arianespace.03b-Edit-M20130626094533

The project was born from the frustrations of US Internet pioneer Greg Wyler with the  inadequacy of Rwanda’s telecommunications network while travelling there in 2007. He came up with a plan to bypass costly ground-based infrastructure like fibre-optics or cables by deploying a constellation of small satellites around the equator to serve as a spatial relay between users and the worldwide web using only satellite dishes.

Such a system would cover a region between the latitudes of 45 degrees North and 45 degrees South — the entire African continent, most of Latin America, the Middle East, Southeast Asia, Australia and the Pacific Islands.

“Today, a life-changing journey has begun for many of the remaining unconnected and underserved regions of the world,” O3B chairman John Dick said in a statement.

There are already geostationary satellites providing this type of services, but at a prohibitive cost for many end-users in this region.

Existing satellites generally obit at an altitude of some 36,000 kilometres (22,000 miles) above Earth, weigh in at a hefty four to six tonnes each, and take much longer to bounce a signal back to Earth, according to a background document compiled by O3b Networks.

The new satellites, built by the Franco-Italian company Thales Alenia Space, will orbit at 8,062 km and will weigh only 650 kilogrammes (1,400 pounds) each. Crucially, they will communicate with Earth four times faster, said the company, and six would be enough to assure permanent coverage.

“O3b’s prices will be 30 – 50 percent less than traditional satellite services,” said the document. And it added that a country like the Democratic Republic of Congo could move from being one of the most poorly connected on Earth to one of the best.

Project investors include Internet giant Google, cable company Liberty Global, satellite operator SES, HSBC bank and the Development Bank of Southern Africa.

The first four satellites had initially been scheduled to be sent into space on Monday but the launch was postponed due to bad weather. The next four satellites will be launched within weeks, according to Ariane space, and a final four “backup” orbiters early next year.

To refine its coverage, the constellation could in the end have as many as 16 supplementary satellites in addition to the 12 main ones, said O3b Networks.

The world’s fastest satellite Internet connection using a very small aperture terminal (VSAT) was demonstrated at a public lecture held at NTU. The VSAT is portable and has an antenna dish of only 1.2m, which can achieve a high data transfer rate of up to 155Mbps.

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Realize The Internet Language, When You Get Net Problem :

Realize The Internet Language :

Moreover, when we visit to different weblink but that web doesn’t give any response, then view some different message such as: 502 Bad Gateway, 404 Not Found, 403 Forbidden, 400 bad Request, 4xx Client Error Continue, 408 Request Time Out, 415 Unsupported Media Type, 450 Blocked By windows Parental Controls, 500 Internal Server Error, etc. is different meaning by that, describing below ::

502 Bad Gateway : Server was running as like Proxy or Gateway & was getting a fault signal in Down Stream.

400 bad Request : User or Server is not given the request correct pathway.

403 Forbidden : The Server doesn’t take the request.

404 Not Found : At the current time, not get anything but in future time, may be found.

408 Request Time Out : After a request to the server, time is over of the server.

410 Gone : in the current time, not get anything & in future time, not find that thing.

413 Request Entity Too Large : so much request is sent to the server,

204 No Content : That type of contents is not found on the server.