SpaceX Starlink Faces Radio Interference Fight

SpaceX's initiative to boost Starlink to gigabit speeds is encountering a significant challenge from competitor Iridium. Iridium has voiced concerns to the Federal Communications Commission (FCC), alleging that SpaceX's planned "gateway" stations pose a risk of radio interference.

In a letter submitted recently, Iridium's attorney stated that simulations indicated potential interference exceeding maximum levels, particularly for gateways located near Iridium's own facilities. Consequently, Iridium is urging the FCC to deny 28 applications from SpaceX related to these gateway stations, specifically requesting a block on the use of affected radio spectrum.

Gateway stations are essential for transmitting data to orbiting satellites, which then relay the information to user devices. SpaceX already operates over 100 gateway sites in the US, featuring more than 1,500 antennas. The company seeks to deploy next-generation V3 satellites and new gateway facilities to harness a wider range of radio frequencies for enhanced speeds.

In April, SpaceX applied to the FCC for a next-generation gateway station in Bastrop, Texas, requesting access to airwaves including the 19.4 to 19.6 GHz and 29.1 to 29.3 GHz bands. Iridium subsequently petitioned the FCC in May to prevent SpaceX from using these specific bands for its new gateway stations, as Iridium utilizes the same spectrum for its mobile satellite services' feeder links.

Iridium contends that SpaceX has not adequately coordinated its operations or demonstrated that they will not cause unacceptable interference, thereby rendering SpaceX's applications deficient. However, SpaceX has urged the FCC to dismiss these protests, asserting that its own simulations demonstrate no interference risk due to significant geographical separation and atmospheric conditions.

SpaceX further argues that Iridium's objections impose undue restrictions that could delay the rollout of vital high-quality broadband services. Conversely, Iridium maintains that SpaceX's interference analysis is flawed, focusing on fixed rather than mobile satellite services. Iridium suggests that a denial would provide space for continued coordination discussions to find a mutually agreeable solution.