What is a maritime satellite?

Absrtact: 1. September 7, programmer Justinwatt boarded Ocean Capcleveland, traveling with the ship. The ship, which departs from Philadelphia and is destined for New Zealand's Oakland, will sail for 28 days in the sea. Along the way, Justin Watt is updating his blog and sharing his travels.

1.

September 7, programmer Justinwatt boarded Ocean Capcleveland, traveling with the ship.

The ship, which departs from Philadelphia and is destined for New Zealand's Oakland, will sail for 28 days in the sea.

Along the way, Justin Watt is updating his blog and sharing travel photos. According to the latest article, 24 hours ago, his position was 15.248547 degrees north latitude, 74.746492 degrees west longitude, the Caribbean Sea between Jamaica and Colombia.

However, the ship is not equipped with Internet equipment. How can he surf the internet in the sea?

2.

Today, he finally solved the mystery, the original use of maritime satellite Internet.

I have always thought that maritime satellites are very expensive things. After reading his article to know, in fact, the individual can afford. Do as he says, and you can surf the internet in the sea.

3.

First of all, what is a maritime satellite?

In 1979, the International Maritime Organization (IMO) decided to set up an "International mobile Satellite Organization" to provide satellite communications for ships sailing in the sea. The satellite that the organization launches is called the Maritime satellite.

In 1999, the organization broke away from IMO and became a privately held commercial company named Inmarsat, which provides satellite communications services to the world. So, strictly speaking, its satellites can no longer be called maritime satellites, but ordinary commercial satellites. The company was listed on the London Stock Exchange in 2005. 2009 operating income is 1.038 billion U.S. dollars, net profit is 153 million dollars.

At present, Inmarsat company has a total of three satellites, in addition to the polar regions, covering all parts of the Earth.

The three satellites comprise a local area network (LAN), Inmarsat the Local area network (BGAN) (Broadband global area, broadband). When your computer is connected to the satellite, not directly connected to the Internet, but through the Bgan of the LAN gateway, and then communicate with the Internet. For example, three satellite IP address is http://192.168.1.35/, on-line can access the Web interface of this address, view the satellite status.

4.

For satellite access, you must first get a satellite modem to connect to the satellite.

Bgan's modem, is a special model, that is, it can only be used to even maritime satellites. At present, the lowest end of the model is Wideye Sabre 1, the price of 1138 U.S. dollars.

Its volume is 259mm (long) x159mm (wide) x58mm (high), weighing 1.65 kg, or quite portable. Built-in lithium battery, without the use of external power, can standby 36 hours, continuous work for 1-3 hours. The machine has the telephone RJ-11 interface and the LAN 10Mbps interface, can satisfy the voice and the data communication.

Its uplink rate is 240kbps and the downlink rate is 384kbps. According to Justin Watt's test, he can run full, so he can barely count for broadband.

5.

However, for ordinary people, more than 1000 dollars/a modem, still too expensive. It is impossible to buy one for a long journey.

What do we do?

Very simple, can not afford to rent ah.

You search for "BGAN rental" in Google, and you get a lot of results. Justin Watt chose Satellitephonestore.com, where the price of rents is already a level that ordinary people can afford. Wideye Sabre 1 of the monthly rent is 155.95 U.S. dollars, the weekly rent is 39.95 U.S. dollars, the daily rent is 6.95 dollars.

It should be noted that this is only the rental of equipment, the Internet fee is charged separately. The price per MB is 6~8 USD (varies according to the prepaid fee).

Take Justin Watt For example, he traveled one months, equipment rental is 155.95 U.S. dollars, and another 150 dollars, bought 25MB of traffic, a total of 300 U.S. dollars, that is, 2000 yuan. For individuals, the price is not cheap, but far from unattainable. In some special circumstances, such costs can be exchanged for one months no matter when and where, always keep in touch with the outside world, it should be worthwhile.

6.

Finally, a summary of the use of maritime satellite Internet access steps.

The first step: Come outside.

Step two: Turn on your laptop.

Step three: Open the satellite modem.

Step Fourth: Connect the two wires together.

Fifth step: In the notebook, open the browser, Access Gateway http://192.168.1.35/. Follow the prompts to type your username and password.

Sixth step: Select the Setup tab and click on the "register receptacle" link to register the device in the network.

Seventh Step: Select the Data tab, click the "Activate Profile" button in the "Primary Profiles" option to confirm that your device has obtained the IP address.

Now, you can surf the internet in the sea.