The Pentagon bought six months of satellite communication services from Viasat, exercising a $20.9 million option to an existing services contract.

Under the deal announced Nov. 30, Carlsbad-based Viasat (Nasdaq: VSAT) will provide senior U.S. government leaders and their staffs with the ability to communicate from government aircraft, using the Ku and Ka satellite bands (which are frequencies similar to television channels). The deal runs between Dec. 1 and May 31.

The new option brings the cumulative face value of the contract to $73.2 million. The deal is a sole source contract.

The Defense Information Technology Contracting Organization at Scott Air Force Base, Illinois made the award.