This page provides information about potential interference to GPS users from Ligado Networks.
On April 20, 2020, the Federal Communications Commission (FCC) announced that, "it has approved with conditions Ligado's application to deploy "a low-power terrestrial nationwide network in the L-Band that will primarily support 5G and Internet of Things services."
The Executive Branch (which is separate from FCC) is concerned because Ligado's proposed transmission power exceeds the thresholds established by the GPS Adjacent Band Compatibility study to protect GPS users from harmful interference.
Recent Developments & Executive Branch Position Statements
- Secretary of Commerce Letter to Senator Inhofe
- File
- FCC Order Denying Motion for Stay of Ligado Order and Authorization
- National Space-Based PNT Advisory Board Position
- Fileparkinson.pdf (1.45 MB)
- DOT Briefing to FCC
- NTIA Reply to the Opposition to Petitions for Reconsideration or Clarification Submitted by Ligado Networks LLC
- NTIA Petitions for Stay and Reconsideration in Ligado Proceedings
- DOD Testimony to Senate Armed Services Committee
- FCC Order and Authorization for Ligado Networks
- DHS Statement on Ligado
- NTIA Letter to FCC Chairman re Ligado Applications
- DOT Adjacent Band Compatibility (ABC) Assessment
- EXCOM Gap Analysis
- File2018-03-NPEF-gap-analysis (1).pdf (1.08 MB)
- Air Force Paper on 1 dB GPS Interference Protection Criterion
- File1dB-background-paper.pdf (178.36 KB)
- National Advanced Spectrum and Communications Test Network (NASCTN) Report on LTE Impact on GPS Receivers