The difference between maritime satellite, Iridium satellite, Globalstar, Eurostar and Asiastar satellite phones

1. Different satellite compositions

1. Maritime satellites: geostationary satellites with an altitude of 36,000 kilometers;

2. Iridium satellites: composed of 66 low-orbit satellites Composed of satellites, with an altitude of 765 kilometers;

3. Global Star: composed of 48 low-orbit satellites, with an altitude of 1,414 kilometers;

4. Eurostar: 3 satellites 36,000 kilometers away from the earth Composed of high-orbit satellites;

5. Sub-satellite: geostationary satellite, with an altitude of 36,000 kilometers.

2. Different technologies used

1. Maritime satellite: spot beam technology;

2. Iridium satellite: TDMA technology, interstellar link;

3. Globalstar: CDMA technology and bending tube technology;

4. Asiastar: Spot beam technology;

3. Different applicable regions

1. Maritime satellite: ocean, land, and aviation outside the two poles;

2. Iridium satellite: global;

3. Global satellite: between 70 degrees north and south latitude (Beijing ground station, covering only most areas of China)

4. European Star: About 160 countries and regions except the North and South Pole and North and South America.

5. Asia Star: All Asia.

Reference materials:

Baidu Encyclopedia - Satellite Phone

Baidu Encyclopedia - Maritime Satellite

Baidu Encyclopedia - Iridium< /p>

Baidu Encyclopedia - Global Star