SpectrumWiki
Radio spectrum allocations
Look up a frequency or a range.
Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz
8.175 GHz (8,175,000,000 Hz)
U.S. Federal Government Allocations
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
Mobile-satellite (Earth-to-space) (no airborne transmissions)
ITU Region 1 Allocations
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463
ITU Region 2 Allocations
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463
ITU Region 3 Allocations
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463
Footnotes
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5.462A In Regions 1 and 3 (except for Japan), in the band 8 025-8 400 MHz, the Earth exploration-satellite service using geostationary satellites shall not produce a power flux-density in excess of the following values for angles of arrival (θ), without the consent of the affected administration:
−135 dB(W/m2) in a 1 MHz band for 0 ° ≤ θ < 5°
−135 + 0.5 (θ − 5) dB(W/m2) in a 1 MHz band for 5 ° ≤ θ < 25°
−125 dB(W/m2) in a 1 MHz band for 25 ° ≤ θ ≤ 90°(WRC 12)
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5.463 Aircraft stations are not permitted to transmit in the band 8 025-8 400 MHz. (WRC-97)
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G104 In the bands 7450-7550 and 8175-8215 MHz, it is agreed that although the military space radio communication systems, which include earth stations near the proposed meteorological-satellite installations will precede the meteorological-satellite installations, engineering adjustments to either the military or the meteorological-satellite systems or both will be made as mutually required to assure compatible operations of the systems concerned.
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G117 In the bands 7.25-7.75 GHz, 7.9-8.4 GHz, 17.375-17.475 GHz, 17.6-21.2 GHz, 30-31 GHz, 33-36 GHz, 39.5-41 GHz, 43.5-45.5 GHz and 50.4-51.4 GHz, the Federal fixed-satellite and mobile-satellite services are limited to military systems.
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US258 In the bands 8025-8400 MHz and 25.5-27 GHz, the Earth exploration-satellite service (space-to-Earth) is allocated on a primary basis for non-Federal use. Authorizations are subject to a case-by-case electromagnetic compatibility analysis.
Wiki entries
WRC-27 study for potential IMT use
Proposed Use
7125–8400 MHz WRC-27 study for potential IMT use
WRC-27 agenda item 1.7:
to consider studies on sharing and compatibility and develop technical conditions for the use of International Mobile Telecommunications (IMT) in the frequency bands 4 400-4 800 MHz, 7 125-8 400 MHz (or parts thereof), and 14.8-15.35 GHz taking into account existing primary services operating in these, and adjacent, frequency bands, in accordance with Resolution 256 (WRC-23)
to consider studies on sharing and compatibility and develop technical conditions for the use of International Mobile Telecommunications (IMT) in the frequency bands 4 400-4 800 MHz, 7 125-8 400 MHz (or parts thereof), and 14.8-15.35 GHz taking into account existing primary services operating in these, and adjacent, frequency bands, in accordance with Resolution 256 (WRC-23)
Defense Satellite Communication System 3 (DSCS III)
Current Use
7900–8400 MHz DSCS III uplink
According to the U.S. Space Force:
Defense Satellite Communications System (DSCS) constellation provides long haul communications to users worldwide through contested environments.
DSCS supports: the defense communications system, the military’s ground mobile forces, airborne terminals, ships at sea, and Department of Defense (DOD).
The first DSCS III satellite was launched in October 1982. The final DSCS III satellite, B6, was launched in August 2003. In all, DSCS III successfully launched 14 satellites, six of which are still operational and continue to be used in various capacities, from operational communications in Southwest Asia to research and development of ground-based support capabilities.
Space and Missile Systems Center (SMC), Los Angeles Air Force Base, Calif., sustains the DSCS Space Segment contract.
DSCS III satellites support globally distributed DOD and national security users. Modifications made to these satellites will provide substantial capacity improvements through higher power amplifiers, more sensitive receivers, and additional antenna connectivity options. The DSCS communications payload includes six independent Super High Frequency (SHF) transponder channels. Three receive and five transmit antennas provide selectable options for Earth coverage, area coverage and/or spot beam coverage. A special purpose single-channel transponder is also on board.
DSCS satellites provide the capabilities needed for effective implementation of worldwide military communications. It can adapt rapidly to dynamic operating conditions and perform under stressed environments. DSCS operates with large or small terminals. DSCS’s independent channels group users by operational needs or geographical location by allocating receiver sensitivity and transmitter power, thus providing maximum efficiency.
Defense Satellite Communications System (DSCS) constellation provides long haul communications to users worldwide through contested environments.
DSCS supports: the defense communications system, the military’s ground mobile forces, airborne terminals, ships at sea, and Department of Defense (DOD).
The first DSCS III satellite was launched in October 1982. The final DSCS III satellite, B6, was launched in August 2003. In all, DSCS III successfully launched 14 satellites, six of which are still operational and continue to be used in various capacities, from operational communications in Southwest Asia to research and development of ground-based support capabilities.
Space and Missile Systems Center (SMC), Los Angeles Air Force Base, Calif., sustains the DSCS Space Segment contract.
DSCS III satellites support globally distributed DOD and national security users. Modifications made to these satellites will provide substantial capacity improvements through higher power amplifiers, more sensitive receivers, and additional antenna connectivity options. The DSCS communications payload includes six independent Super High Frequency (SHF) transponder channels. Three receive and five transmit antennas provide selectable options for Earth coverage, area coverage and/or spot beam coverage. A special purpose single-channel transponder is also on board.
DSCS satellites provide the capabilities needed for effective implementation of worldwide military communications. It can adapt rapidly to dynamic operating conditions and perform under stressed environments. DSCS operates with large or small terminals. DSCS’s independent channels group users by operational needs or geographical location by allocating receiver sensitivity and transmitter power, thus providing maximum efficiency.
Wideband Global SATCOM (WGS) System
Current Use
7900–8400 MHz X-band uplink
The Wideband Global SATCOM (WGS) System provides fixed site satellite service at X-band and Ka-band from geosynchronous earth orbit in support of US military operations worldwide.
As of April 2013, four WGS satellites are in orbit, a fifth is scheduled for launch in 2013, a sixth has completed testing, and four more are being built.
As of April 2013, four WGS satellites are in orbit, a fifth is scheduled for launch in 2013, a sixth has completed testing, and four more are being built.
Skybox high-resolution imaging satellites
Proposed Use
8170–8230 MHz Skybox Imaging data downlink
Skybox Imaging plans to launch two non-GSO high-resolution imaging satellites, SkySat-1 and SkySat-2, in 2013. The earth stations and satellites will operate under FCC licenses E130037 and S2862. The uplink and downlink signals use both horizontal and vertical polarization.
According to its website, Skybox Imaging offers a variety of services derived from its imaging data to various industries, including online mapping, oil & gas, financial trading, real estate & construction, natural resources, mining, maritime, forestry, insurance, civil government, humanitarian, telecom & utilities, news & media, location-based services & navigation, and agriculture.
SkySat-1 will operate from an altitude of 578-600 km and orbital period 96.5 min. SkySat-2 will use 637 km and 97.5 min. Both satellites will be in an orbital inclination of about 98 deg.
According to its website, Skybox Imaging offers a variety of services derived from its imaging data to various industries, including online mapping, oil & gas, financial trading, real estate & construction, natural resources, mining, maritime, forestry, insurance, civil government, humanitarian, telecom & utilities, news & media, location-based services & navigation, and agriculture.
SkySat-1 will operate from an altitude of 578-600 km and orbital period 96.5 min. SkySat-2 will use 637 km and 97.5 min. Both satellites will be in an orbital inclination of about 98 deg.