Just two weeks after launching a Tesla Roadster into space in the maiden flight of the Falcon Heavy rocket, SpaceX got back to business Thursday, launching a Falcon 9 carrying a $200 million Spanish radar imaging satellite and two experimental internet relay stations, pathfinders for SpaceX's proposed mega-network of orbital broadband beacons.
Running a day late because of high upper level winds, the 229-foot-tall rocket blasted off from Vandenberg Air Force Base, Calif., at 9:17 a.m. EST, streaking away to the south over the Pacific Ocean as it climbed toward an orbit around Earth's poles.
The rocket's first stage -- the ninth previously flown SpaceX booster to make a second flight -- powered the vehicle out of the thick lower atmosphere and then fell away two-and-a-half minutes after liftoff. No attempt was made to recover the used rocket, which fell back to Earth and crashed into the Pacific.
The company did presumably attempt to recover the nose cone panels that protected the satellite payload during the early moments of the flight using a custom-designed recovery ship stationed down range from the launch site. But SpaceX provided no immediate confirmation.
The single engine powering the second stage, meanwhile, fired for about six minutes and 20 seconds, putting putting Hisdesat's 1.5-ton PAZ -- "Peace" -- satellite into a 320-mile high orbit.
Using a sophisticated radar imaging system that can "see" Earth's surface through clouds, day or night, PAZ is designed to capture images showing features as small as 9.8 inches across, covering an area of nearly 116,000 square miles every day. The imagery will be provided to the Spanish government and its allies as well as commercial users.
"It's a very flexible mission," Miguel Angel García Primo, chief operating officer of Hisdesat, told Spaceflight Now. "It's useful for a lot of applications, environmental, also for big infrastructure tracking and planning, maritime surveillance and government applications like monitoring and surveillance for any specific items that you'd like to follow."
PAZ will work in concert with two other synthetic aperture radar satellites already in orbit, TerraSAR-X and TanDEM-X, to provide very high resolution imagery and to shorten the time between overflights of high-priority targets.
While PAZ was the primary payload for Thursday's launch, much of the attention on the flight went to the secondary payloads, two SpaceX-developed orbital broadband prototypes known as Microsat-2a and Microsat-2b.
The PAZ radar imaging satellite floats away from the Falcon 9 second stage after a successful climb to orbit.
SpaceX
SpaceX did not mention the satellites in its press kit, but the company said in a Feb. 1 letter to the Federal Communications Commission that the 880-pound relay stations would be aboard. And on Wednesday, SpaceX founder Elon Musk tweeted the Falcon 9 "carries 2 SpaceX test satellites for global broadband. If successful, Starlink constellation will serve least served."
In an FCC application last year, SpaceX proposed a vast network -- Starlink -- of up to 4,425 small satellites, orbiting at altitudes between 689 and 823 miles, broadcasting internet content in high-speed Ku- and Ka-band frequencies. The company also has proposed launching more than 7,500 satellites in lower 210-mile-high orbits using different frequencies.
The two microsats on board Thursday were expected to be released in the same orbit as PAZ. After checkout, both were to be maneuvered into 700-mile-high orbits. The satellites are equipped with phased array antennas and optical links for communications between spacecraft.
FCC Chairman Ajit Pai said last week he supported SpaceX's proposed Starlink network, saying "to bridge America's digital divide, we'll have to use innovative technologies."
"Satellite technology can help reach Americans who live in rural or hard-to-serve places where fiber optic cables and cell towers do not reach," Pai said in a statement. "And it can offer more competition where terrestrial Internet access is already available.
"I have asked my colleagues to join me in supporting this application and moving to unleash the power of satellite constellations to provide high-speed Internet to rural Americans. If adopted, it would be the first approval given to an American-based company to provide broadband services using a new generation of low-Earth orbit satellite technologies."
SpaceX faces stiff competition from OneWeb, a company that plans to launch more than 800 330-pound satellites. They will be built on a production line in an $85 million 100,000-square-foot factory near the Kennedy Space Center. OneWeb plans to launch its first spacecraft later this year from French Guiana atop a Soyuz rocket.
The FCC already approved OneWeb's proposal as well as another for a network being developed in Canada by Telesat.
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