Inmarsat GSPS (or Global Satellite Phone Service) provides phone calling, short messaging (SMS), email-to-text, and 2400 bps data over much of the world excluding the polar caps. Other Inmarsat solutions such as BGAN are available if high speed internet is required.
Outfitter Satellite generally recommends GSPS for users operating between 50° N and 50° S latitude in flat or hilly terrain but not extremely mountainous terrain. The main benefit of GSPS over other mobile satellite services is the ability to make long duration calls without unexpected call drops.
The workhorse GSPS phone is the IsatPhone 2 which has several important features:
The IsatPhone 2 handheld satellite phone is intended for outdoor use where it has a clear line of sight to the sky. In-building and in-vehicle applications require a docking stations with an external antenna. The IsatDock 2 PRO and IsatDock 2 MARINE have a variety of features including a privacy handset, speaker phone with mute button, Bluetooth support, data call support, and an RJ-11 phone port for use with conventional phone equipment. The marine version of the docking station has a water resistant translucent screen that protects the satellite phone while it is docked. Various antennas are available:
Solar Charging Solutions: The IsatPhone series phones are USB re-chargeable. Outfitter Satellite offers several solar charging solutions depending on your application.
Our 6-Watt and 10-Watt back-pack mountable solar chargers charge an internal Li-Ion battery while you walk down the trail. You can recharge your satellite phone or other small USB-chargeable electronics later at your convenience -- even at night -- using the stored charge. The 10-Watt version also has a 12 Volt DC output for accessories with car chargers.
The Inmarsat GSPS coverage area uses three Inmarsat I-4 satellites. Outfitter Satellite recommends Inmarsat GSPS service for users operating between 50° N and 50° S latitude. Unfortunately, as you travel north of 50° N (or south of 50° S latitude), the Inmarsat satellites tend to be closer to the horizon and the possibility of terrain masking from vertical obstructions such as mountains or trees increases. It is the responsibility of the user to consider this issue before traveling to any given location. Outfitter Satellite's staff can provide you with the elevation angle above the horizon and the azimuthal "compass" angle for the I-4 satellite if you will provide us with the GPS position where you intend to use the satellite.