Small-satellite start-ups sometimes have little experience buying launches from companies like California-based SpaceX and France’s Arianespace, said Bill Ostrove, aerospace and defence analyst at Forecast International. At the same time, these launch service providers are looking for help to coordinate the deluge of developers looking to send small satellites into space, he said.

Sunday’s scheduled SpaceX launch is three years in the making for Seattle-based Spaceflight, which bought the entire Falcon 9 rocket to accommodate its various customers. The launch will be Spaceflight’s first ride-share mission dedicated exclusively to small satellites.

The purchase indicates that the small satellite industry is “healthy and thriving,” said Kerri Cahoy, associate professor of aeronautics and astronautics at the Massachusetts Institute of Technology.

“There’s a lot of new businesses … and a steady stream” of customers, Cahoy said. Being able to sell more than 60 spots on a rocket to customers is “impressive,” she said.

Spaceflight started about six years ago by helping customers test their small satellites, obtain the necessary launch and operating licenses before shipping the spacecraft to the launch site, and integrate them onto the rocket, said Curt Blake, Spaceflight president.

Typically, small satellites get to space by “piggybacking” on the launch of a larger satellite and fitting in where there’s space on the rocket. The best known example is a 2017 launch of the Indian space agency’s PSLV rocket, which deployed a 1,574-pound satellite and 103 small satellites. Most of those of those were Earth-imaging satellites made by San Francisco-based Planet Labs Inc.

While ride-sharing can be a more affordable way to reach orbit, it also means the tiny spacecraft are subject to the timing and orbit destination of the primary satellite.

There is now another way. Huntington Beach’s Rocket Lab has developed and launched its Electron rocket, which is designed specifically to carry small satellites and to allow more flexibility in time and orbit. Other companies, including Virgin Orbit and Vector, are working on their own small-satellite launchers.

Spaceflight negotiates with launch companies to find and purchase slots for their small satellite customers. As more launch companies have come online, Spaceflight has increased its partnerships to include some of the smaller rockets, such as the Electron and Virgin Orbit’s LauncherOne, which will air-launch satellites from beneath the wing of a modified Boeing 747.

“They serve different niches that our customers want,” Blake said.

The satellite launch broker industry is not large – analysts said there are only a few players, including Spaceflight. Business has been stable so far, though there is a chance launch companies could take those services in-house, Ostrove said.

“It certainly has a chance of being lucrative,” he said.

Spaceflight’s parent company, Spaceflight Industries Inc., has raised more than US$200 million in capital. Spaceflight Industries also has a subsidiary, BlackSky, which provides Earth-imaging data to customers.

In November, Spaceflight Industries filed an offering of US$29.9 million in debt and other securities. The company said US$22 million had already been sold, according to a filing with the Securities and Exchange Commission.

Blake said he sees Spaceflight’s future in providing even more flexibility in launch services and timing. The company now allows customers to move between rocket launches, but charges a change fee.

“It really becomes more like an airline model,” he said.

The launch is scheduled to occur at 10.32am PST from Vandenberg Air Force Base near Lompoc, California. This will be the first time SpaceX uses a first-stage booster that has flown twice before. If successful, it will be SpaceX’s 19th launch of the year, marking its highest annual launch total yet.