SpectrumWiki

Radio spectrum allocations

Look up a frequency or a range.

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

56.999999999 GHz (56,999,999,999 Hz)

U.S. Non-Federal-Government Allocations

56.9 – 57 GHz

EARTH EXPLORATION-SATELLITE (passive)

FIXED

MOBILE 5.558

SPACE RESEARCH (passive)

US532

U.S. Federal Government Allocations

56.9 – 57 GHz

EARTH EXPLORATION-SATELLITE (passive)

FIXED

INTER-SATELLITE G128

MOBILE 5.558

SPACE RESEARCH (passive)

US532

ITU Region 1 Allocations

56.9 – 57 GHz

EARTH EXPLORATION-SATELLITE (passive)

FIXED

INTER-SATELLITE 5.558A

MOBILE 5.558

SPACE RESEARCH (passive)

5.547 5.557

ITU Region 2 Allocations

56.9 – 57 GHz

EARTH EXPLORATION-SATELLITE (passive)

FIXED

INTER-SATELLITE 5.558A

MOBILE 5.558

SPACE RESEARCH (passive)

5.547 5.557

ITU Region 3 Allocations

56.9 – 57 GHz

EARTH EXPLORATION-SATELLITE (passive)

FIXED

INTER-SATELLITE 5.558A

MOBILE 5.558

SPACE RESEARCH (passive)

5.547 5.557

Footnotes

5.547 The bands 31.8-33.4 GHz, 37-40 GHz, 40.5-43.5 GHz, 51.4-52.6 GHz, 55.78-59 GHz and 64-66 GHz are available for high-density applications in the fixed service (see Resolution 75 (WRC-2000)*). Administrations should take this into account when considering regulatory provisions in relation to these bands. Because of the potential deployment of high-density applications in the fixed-satellite service in the bands 39.5-40 GHz and 40.5-42 GHz (see No. 5.516B), administrations should further take into account potential constraints to high-density applications in the fixed service, as appropriate. *This resolution was revised by WRC-12. (WRC 07)
5.557 Additional allocation: in Japan, the band 55.78-58.2 GHz is also allocated to the radiolocation service on a primary basis. (WRC-97)
5.558 In the bands 55.78-58.2 GHz, 59-64 GHz, 66-71 GHz, 122.25-123 GHz, 130-134 GHz, 167-174.8 GHz and 191.8-200 GHz, stations in the aeronautical mobile service may be operated subject to not causing harmful interference to the inter-satellite service (see No. 5.43). (WRC 2000)
5.558A Use of the band 56.9-57 GHz by inter-satellite systems is limited to links between satellites in geostationary-satellite orbit and to transmissions from non-geostationary satellites in high-Earth orbit to those in low-Earth orbit. For links between satellites in the geostationary-satellite orbit, the single entry power flux-density at all altitudes from 0 km to 1 000 km above the Earth’s surface, for all conditions and for all methods of modulation, shall not exceed
–147 dB(W/(m² · 100 MHz)) for all angles of arrival. (WRC-97)
G128 Use of the band 56.9-57 GHz by inter-satellite systems is limited to transmissions between satellites in geostationary orbit, to transmissions between satellites in geostationary satellite orbit and those in high-Earth orbit, to transmissions from satellites in geostationary satellite orbit to those in low-Earth orbit, and to transmissions from non-geostationary satellites in high-Earth orbit to those in low-Earth orbit. For links between satellites in the geostationary satellite orbit, the single entry power flux-density at all altitudes from 0 km to 1000 km above the Earth's surface, for all conditions and for all methods of modulation, shall not exceed −147 dB (W/m²/100 MHz) for all angles of arrival.
US532 In the bands 21.2-21.4 GHz, 22.21-22.5 GHz, and 56.26-58.2 GHz, the space research and Earth exploration-satellite services shall not receive protection from the fixed and mobile services operating in accordance with the Table of Frequency Allocations.