Cape Canaveral, Florida (Reuters) - Space Exploration Technologies, the first private company to fly to the International Space Station, is poised to launch its initial cargo mission to the orbital outpost as part of a $1.6 billion contract with NASA to deliver supplies.

Liftoff of the company's Falcon 9 rocket and Dragon capsule is scheduled for 8:35 p.m. EDT on Sunday (0035 GMT Monday) from Cape Canaveral Air Force Station in Florida.

If successful, the company, founded and run by Internet entrepreneur Elon Musk, will restore a U.S. supply line to the station that was cut off by the retirement of the space shuttles last year.

Since then, NASA has been dependent on Russian, European and Japanese freighters to service the station, a permanently staffed research laboratory that flies about 250 miles above Earth.

In May the firm, also known as SpaceX, made a practice run to the $100 billion orbital outpost, a project of 15 countries, clearing the way for the first of 12 cargo runs.

SpaceX is one of two firms hired by NASA to deliver cargo to the station.

Its other contractor, Orbital Sciences Corp., on October 1 rolled out its first Antares rocket to a new launch pad on Wallops Island, Virginia, for an engine test-firing slated for this month or early November.

The rocket is scheduled to make its debut flight before the end of the year.

Orbital also plans a practice run to the space station, similar to what SpaceX did when its Dragon ship docked at the station. If all goes well, Orbital will be cleared to begin work on its $1.9-billion NASA contract to fly cargo to the station.

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SpaceX set for its first cargo run to space station