47 C.F.R. § 25.289

Protection of GSO networks by NGSO systems

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Link to an amendment published at 91 FR 26948, May 13, 2026.This amendment was delayed indefinitely, at 91 FR 26948, May 13, 2026.

Unless otherwise provided in this chapter, an NGSO system licensee must not cause unacceptable interference to, or claim protection from, a GSO FSS or GSO BSS network. An NGSO FSS licensee operating in compliance with the applicable equivalent power flux-density limits in Article 22, Section II of the ITU Radio Regulations (incorporated by reference, § 25.108) will be considered as having fulfilled this obligation with respect to any GSO network.

[82 FR 59986, Dec. 18, 2017]

Notes of Decisions

Cited in 3 cases (3 in the last 5 years), 2022–2024 · leading case: Viasat, Inc. v. FCC, 47 F.4th 769 (D.C. Cir. 2022).

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Viasat, Inc. v. FCC, 47 F.4th 769 (D.C. Cir. 2022). · cites it 2× “47 C.F.R. § 25.289 . More specifically, NGSO systems must operate within power limits set by the International Telecommunications Union (ITU), a United Nations agency responsible for addressing signal interference internationally.”

Int'l Dark-Sky Ass'n, Inc. v. FCC, 106 F.4th 1206 (D.C. Cir. 2024). “47 C.F.R. § 25.289 . Interference is measured in terms of “power flux-density,” which must remain below set limits.”

Viasat, Inc. v. FCC (D.C. Cir. 2022). · cites it 2× “47 C.F.R. § 25.289 . More specifically, NGSO systems must operate within power limits set by the International Telecommunications Union (ITU), a United Nations agency responsible for addressing signal interference internationally.”

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