Amazon Says Prototype Internet Satellites Are Working as Planned

Amazon.com Inc. says the two prototype communications satellites it launched into space last month are functioning as designed, paving the way for the company to begin mass-producing devices that will power its internet-from-space venture.

Amazon’s Project Kuiper teams recently completed the initial slate of tests on the two satellites, evaluating everything from flight computers and solar-power arrays to propulsion and radio transmission. The two prototypes, sent aloft Oct. 6 on a United Launch Alliance LLC rocket, have demonstrated 4K video streaming and two-way video calls over the Kuiper network, among other milestones.

Amazon will continue testing the satellites as ...