SpaceX's SCS Testing Causing Harmful Interference: Omnispace

SpaceX's supplemental coverage from space service (SCS) testing in the 1990-1995 MHz band is causing harmful interference to Omnispace's mobile satellite service (MSS) operations, according to Omnispace. In an FCC docket 23-65 filing posted Monday, Omnispace said co-channel emissions from SpaceX satellites are interfering with its MSS satellite receiver. It said SpaceX is operating outside its authorized parameters. "Enforcement is warranted," Omnispace said. It said medium earth orbit satellite and terrestrial antenna monitoring chronicled the interference, and showed it was due to SpaceX operations and not T-Mobile's terrestrial G-block base stations with downlink operations in the 1990-1995 MHz band. Omnispace said the interference was due to at most a pair of SpaceX test satellites, given the separation of the satellites in orbit. It said SpaceX's planned direct-to-device service at scale would cause aggregate interference hundreds of times greater, making the band unusable by other MSS operators over large swaths of the planet. Omnispace said that while SpaceX is authorized to conduct SCS testing at altitudes of 525-535 km, its observations show SpaceX doing such testing at 350-360 km. It said Space Force data also shows SpaceX operating at lower-than-authorized altitudes, which "cannot be dismissed as a mere oversight or a response to dynamic on orbit conditions." Omnispace has expressed concerns previously to the FCC about likely interference from SpaceX's SCS plans (see 2305190057). In a letter to Omnispace posted Monday in the docket, SpaceX said it was "extremely concerned" about public statements that it has empirical evidence of SpaceX interference. It asked that the evidence be put into the record. SpaceX also requested that Omnispace put into the public record evidence of service disruptions.