PONTE VEDRA, Florida — Mobile satellite services provider Inmarsat on Aug. 3 said its recently ordered fifth Global Xpress Ka-band satellite offers the bandwidth economics of ViaSat Inc.’s terabit-per-second ViaSat-3 for a total cost of $200 million including launch.

Under construction by Thales Alenia Space of France and Italy and scheduled for launch in late 2019, GX-5 will be stationed over Europe and the Middle East to bolster Inmarsat’s existing four-satellite fleet of GX satellites.

Once in service, the GX-4 satellite . . .

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