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1 1 (December 11, 2023)

handle is hein.crs/govenrl0001 and id is 1 raw text is: S Congressional ____ ~ Research Service National Academies of Sciences, Engineering, and Medicine Report on Ligado Networks and the Interference Debate December 11, 2023 On April 19, 2020, the Federal Communications Commission (FCC) approved an application by Ligado Networks, a U.S. telecommunications company, to deploy a terrestrial network within the United States using segments of L-Band spectrum-spectrum typically used for satellite services. Federal agencies such as the Departments of Defense (DOD), Homeland Security, and Transportation and several Members of the House and Senate Armed Services committees objected to the decision. They contend loud signals from Ligado's terrestrial transmitters will overpower the reception of soft signals from Global Positioning System (GPS) satellites and other mobile satellite services (MSS), potentially impacting DOD operations near Ligado transmitters, as discussed during a May 2020 Senate Armed Services Committee hearing. Members of Congress, GPS experts, GPS device manufacturers, the aviation industry, weather organizations opposed the decision, citing interference concerns. The FCC said its decision, which requires Ligado to mitigate interference, would enhance U.S. leadership in advanced wireless services and was supported by Members of Congress and Trump Administration officials. Petitions for Stay and Reconsideration On May 22, 2020, the National Telecommunications and Information Administration (NTIA), an agency in the Department of Commerce, filed one petition with the FCC, an independent regulatory agency, on behalf of the executive branch to stay the order and another petition to reconsider the decision. On January 19, 2021, the FCC declined to stay the order. Eight other entities filed petitions for reconsideration, all of which are pending. Congress Mandates Review of FCC Decision In the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021 (P.L. 116- 283), enacted January 1, 2021, Congress required DOD to enter into an agreement with the National Academies of Sciences, Engineering, and Medicine (NASEM) for an independent technical review of the Congressional Research Service https://crsreports.congress.gov IN12287 CRS INSIGHT Prepared for Members and Committees of Congress

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