SpaceX launched a Japanese commercial communications satellite early Sunday morning and then landed the first stage of its rocket on a drone ship.

The Falcon 9 rocket lifted off at 1:26 a.m. EDT from Cape Canaveral, Fla., carrying the JCSAT-16 satellite into a geosynchronous transfer orbit. At 1:40 a.m., the first stage landed on a platform floating several hundred miles off the Florida coast.

The secondary objective of landing the first stage of Falcon 9 on the drone ship — named Of Course I Still Love You — is key to the SpaceX mission of reusing rockets.

The satellite, operated by SKY Perfect JSAT Corp., will serve as a backup transmitter for the rest of the communications company’s satellite fleet.

In May, SpaceX successfully launched the JCSAT-14 satellite into orbit. It replaced another of the Japanese company’s satellites and provided coverage to Asia, Oceania, Russia and the Pacific Islands.

At the time, the Hawthorne company repeated the successful landing of its first-stage rocket booster on a drone ship.

The first open-ocean booster landing was in April, giving more credence to Chief Executive Elon Musk’s plans to reduce launch costs by reusing rockets.

SpaceX has landed two first-stage rocket boosters on land, in July and December.

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