The companies say the deal will improve the viability of satellite services in an industry now dominated by streaming providers.

DirecTV and Dish Network, longtime satellite TV adversaries, are set to merge. DirecTV announced a deal with Dish parent company EchoStar to acquire Dish in a deal valued at nearly $10 billion. Under the terms of the purchase agreement,

DirecTV and Dish have agreed to combine in a deal that will create the biggest pay-TV provider in the US with about 18 million subscribers.Under the terms of the transaction, DirecTV will acquire Dish TV and Sling TV from EchoStar Corp.