SpaceX Spy Satellites Transmit Signals in Unexpected Direction
▼ Summary
– Approximately 170 SpaceX Starshield satellites for the NRO are transmitting signals in the wrong direction, from space to Earth, in a frequency band designated for Earth-to-space or space-to-space use.
– The signals were discovered by researcher Scott Tilley, who identified them in the 2025–2110 MHz band over North America, with potential global emissions due to the constellation’s reach.
– These transmissions risk interfering with satellite receivers, as ground stations and satellites listen on these frequencies for uplinks from Earth.
– The incident highlights concerns about a lack of transparency in US government spectrum management and insufficient international coordination.
– The affected frequency band is used by US agencies like NASA and NOAA, as well as nongovernmental users such as TV broadcasters for remote transmissions.
A recent discovery by a satellite researcher has revealed that approximately 170 Starshield satellites, constructed by SpaceX for the U.S. National Reconnaissance Office, are transmitting signals in an unexpected direction. These satellites form a critical part of the NRO’s expanding surveillance network, yet the emissions are occurring in a frequency band internationally designated for communications traveling from Earth to space or between spacecraft, not the reverse. The purpose behind these anomalous transmissions remains unclear, raising questions about their operational intent.
Scott Tilley, an engineering technologist and amateur radio astronomer based in British Columbia, identified the signals while engaged in an unrelated project. His observations, made in late September or early October, detected emissions across segments of the 2025–2110 MHz S-Band. From his location, Tilley confirmed that 170 individual satellites were broadcasting these signals over Canada, the United States, and Mexico. Given the global coverage of the Starshield constellation, it is possible that similar transmissions are occurring over other nations as well.
The frequency band in question is allocated by the International Telecommunication Union, the United States, and Canada primarily for uplink communications to orbiting satellites. This means ground-based stations use these frequencies to send commands and data to spacecraft. The potential for interference is significant: a large constellation emitting powerful signals on these same frequencies could disrupt communications between ground stations and other satellites, affecting both governmental and nongovernmental operations.
In the United States, users of the 2025–2110 MHz band include NASA, the National Oceanic and Atmospheric Administration, and various private entities such as television news broadcasters. These organizations rely on the band for satellite-linked broadcasts from remote locations and for crucial data transmission. Despite the irregular nature of the Starshield emissions, no public reports of interference have surfaced to date.
Tilley’s findings emphasize a broader concern regarding transparency and international coordination in spectrum management. The situation highlights how government-operated satellite networks might not always align with established frequency allocations, potentially creating conflicts without public disclosure or international consultation. The absence of reported disruptions does not eliminate the risk of future interference, especially as satellite constellations continue to grow in size and complexity.
(Source: Ars Technica)
