The federal government's plan to buy two satellites to provide high-speed broadband services to the nation's most remote areas has pleased farmers, but the opposition says it's too costly.

Labor on Wednesday announced a $620 million deal between NBN Co, the government-owned enterprise rolling out the national broadband network (NBN), and US firm Loral Space and Communications to make the Ka-band satellites.

Malcolm Turnbull ... the experts say he's not alone.

When they are launched in 2015, around 200,000 homes and businesses in the remotest regions will have access to internet download speeds similar to those currently available in urban centres.

"We won't be leaving those Australians who live in the remotest parts of the nation behind," Prime Minister Julia Gillard told reporters in Canberra.