Valo Analytica

SpectrumWiki

Radio spectrum allocations

Look up a frequency or a range.

Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz

400.049999 MHz (400,049,999 Hz)

U.S. Federal Government Allocations

399.9 – 400.05 MHz

MOBILE-SATELLITE (Earth-to-space) US319 US320

RADIONAVIGATION-SATELLITE

Footnotes

  • 5.209   The use of the bands 137-138 MHz, 148-150.05 MHz, 399.9-400.05 MHz, 400.15-401 MHz, 454 456 MHz and 459-460 MHz by the mobile-satellite service is limited to non geostationary-satellite systems. (WRC 97)

  • 5.220   The use of the frequency bands 149.9-150.05 MHz and 399.9-400.05 MHz by the mobile-satellite service is subject to coordination under No. 9.11A. (WRC-15)

  • 5.260A   In the frequency band 399.9-400.05 MHz, the maximum e.i.r.p. of any emission of earth stations in the mobile-satellite service shall not exceed 5 dBW in any 4 kHz band and the maximum e.i.r.p. of each earth station in the mobile-satellite service shall not exceed 5 dBW in the whole 399.9-400.05 MHz frequency band. Until 22 November 2022, this limit shall not apply to satellite systems for which complete notification information has been received by the Radiocommunication Bureau by 22 November 2019 and that have been brought into use by that date. After 22 November 2022, these limits shall apply to all systems within the mobile-satellite service operating in this frequency band.

        In the frequency band 399.99-400.02 MHz, the e.i.r.p. limits as specified above shall apply after 22 November 2022 to all systems within the mobile-satellite service. Administrations are requested that their mobile-satellite service satellite links in the 399.99-400.02 MHz frequency band comply with the e.i.r.p. limits as specified above, after 22 November 2019. (WRC 19)

  • 5.260B   In the frequency band 400.02-400.05 MHz, the provisions of No. 5.260A are not applicable for telecommand uplinks within the mobile-satellite service. (WRC 19)

  • US319   In the bands 137-138 MHz, 148-149.9 MHz, 149.9-150.05 MHz, 399.9-400.05 MHz, 400.15-401 MHz, 1610-1626.5 MHz, and 2483.5-2500 MHz, Federal stations in the mobile-satellite service shall be limited to earth stations operating with non-Federal space stations.

  • US320   The use of the bands 137-138 MHz, 148-150.05 MHz, 399.9-400.05 MHz, and 400.15-401 MHz by the mobile-satellite service is limited to non-voice, non-geostationary satellite systems and may include satellite links between land earth stations at fixed locations.

Wiki entries

Space operations

Current Use 399.9–400.05 MHz Federal space stations
In FCC 23-76 (2023), the FCC modified their rules to increase the amount of spectrum available to non-government space operations:

"[W]e adopt a new secondary allocation in the 2025-2110 MHz band for non-Federal space operations, remove the restriction on use of the 2200-2290 MHz secondary non-Federal space operation allocation to four specific sub channels to make the entire 2200-2290 MHz band available, add a non Federal secondary mobile allocation to the 2200-2290 MHz band, and adopt licensing and technical rules for space launch operations. Additionally, we amend the allocation for the 399.9-400.05 MHz band to permit the deployment of Federal space stations. We also seek further comment on whether to adopt licensing and operating rules for payload activities as well as on modifying our existing 2360-2395 MHz space launch rules and on possible additional licensing provisions for sub-orbital launch vehicles. These actions will encourage the continued development of a robust U.S. commercial space sector to the benefit of national interests in security, prosperity, and science."

WRC-19 Agenda Item 1.2

Proposed Use 399.9–400.05 MHz WRC-19 Agenda Item 1.2
1.2 to consider in-band power limits for earth stations operating in the mobile-satellite service, meteorological-satellite service and Earth exploration-satellite service in the frequency bands 401-403 MHz and 399.9-400.05 MHz, in accordance with Resolution 765 [COM6/7] (WRC-15);