Global Satellite Phone

Your choice of satellite phone would be totally dependent on your actual needs. There are multitudes of models of satellite phone and each one is different from another. The battery life of the phone is one of the critical elements to consider and this would need to work with the length of time you will be needing the phone for and how most callas you would expect to make. You can buy pre-paid calls which always work out cheaper than being charged for what you use. Iridium on the other hand provides a more expensive service but boasts that it has more satellites and their service is available all over the World with no limits. The satellite phone markets are dominated by two main Companies which are Iridium and Globalstar. While Globalstar operates services in 120 countries then you will find that Iridium has no limited and can cater for their service to all corners of the globe. There are other small Companies offering restricted services and these smaller networks consist of Inmarst and Thuraya. They all supply different levels of service with various tariffs so you will need to do a little research into the one that suits your needs better. There are a range of different phones to choose from and a selection of tariffs to suit all budgets. Globalstar services can provide satellite communications in 120 countries and is the choice for most customers who just need the general service. For more advanced users then the Iridium satellite phones are available to use in all parts of the earth including out to see where maritime models are available. Satellite phones actually work on the very same radio wave principles as the latest mobile phones except they have installed to do a little more work over far greater distances. While mobile phones simply connect to the networks masts that are conveniently located around the country the satellite has to send the signal around 880 miles into space so that it can be caught by one of the many low orbit satellites that are constantly encircling the earth. A fixed installation, such as used shipboard, may include large, rugged, rack-mounted electronics, and a steerable microwave antenna on the mast that automatically tracks the overhead satellites. Depending on the architecture of a particular system, coverage may include the entire Earth, or only specific regions.

Satellite News: Molniya Orbit - A highly elliptic orbit with inclination of 63. Earth's sun follows this type of orbit about the galactic center of the Milky Way.

GPS News: Air Force conducted GPS jamming exercises in 2003 and they also have GPS anti-spoofing capabilities. Everyone GPS receivers can relay position data to a PC or other device using the NMEA 0183 protocol.