Globalstar, a of the large players in mobile heavenly body voice and information services, has launched other lot of booster to refurbish its constellation.
A Soyuz space station carrying the 6 satellites carried off from the Baikonur cosmodrome at 0227 GMT.
Six other booster were formerly launched back in October.
Globalstar is the initial of the leading sat-phone companies to beginning upgrading their systems. Twelve more booster should launch before the year's end.
The ascent is a dire regard is to firm since its existing constellation is failing.
Rolled out in the late 1990s, many of these original satellites have suffered suspected deviation damage to their S-band receiver equipment, that has paltry their capability to hoop two-way communications.
To compensate, the firm has grown markets that rest on one-way messaging for safety and safety. Its Spot services, for example, run off tiny gadgets that may be carried by a child, a backpacker or a boat, and that send elementary information back to a receiver about place and movement.
Globalstar says its $1bn deputy programme will not usually revive the network to full capability but significantly complement the services similar to Spot that it is able to offer in the future.
However, North American customers have nonetheless to see the gain of the new satellites. The US Federal Communications Commission will not agree to Globalstar to talk with the next era booster inside of its authority until network has been purebred with the United Nations. Globalstar hopes this will come about soon.
Jonathan.Amos-INTERNET@bbc.co.uk
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