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Allocations

U.S. Non-Federal-Government Allocations

8025 - 8400 MHz

US258

U.S. Federal Government Allocations

8175 - 8215 MHz
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)

US258 G104 G117

ITU Region 1 Allocations

8175 - 8215 MHz
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463

5.462A

ITU Region 2 Allocations

8175 - 8215 MHz
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463

5.462A

ITU Region 3 Allocations

8175 - 8215 MHz
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
FIXED-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)
MOBILE 5.463

5.462A

SpectrumWiki

Defense Satellite Communication System 3 (DSCS III)

Wideband Global SATCOM (WGS) System

NASA Deep Space Network (DSN)

GeoEye Imaging Satellites

Skybox-1 and Skybox-2 Earth Exploration-Satellite Service satellites

Skybox high-resolution imaging satellites

Possible new FSS and maritime mobile-satellite allocations, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9

Possible allocations for FSS and maritime mobile-satellite service, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9

Footnotes

5.462A In Regions 1 and 3 (except for Japan), in the band 8025-8400 MHz, the Earth exploration-satellite service using geostationary satellites shall not produce a power flux-density in excess of the following provisional values for angles of arrival (θ), without the consent of the affected administration:

–174 dB(W/m²) in a 4 kHz band	for 0°≤θ< 5°
–174 + 0.5 (θ – 5) dB(W/m²) in a 4 kHz band	for 5°≤θ< 25°
–164 dB(W/m²) in a 4 kHz band	for 25°≤ θ ≤ 90°

These values are subject to study under Resolution 124 (Rev.WRC-2000). (FCC)

5.463 Aircraft stations are not permitted to transmit in the band 8025-8400 MHz.

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.

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.

G117 In the bands 7.25-7.75 GHz, 7.9-8.4 GHz, 17.3-17.7 GHz, 17.8-21.2 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.

SpectrumWiki

Defense Satellite Communication System 3 (DSCS III)

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.

Paired Frequency Bands
Paired Bands	Use	Service	Table
7250 - 7750 MHz	DSCS III downlink	Mobile-satellite	F
7900 - 8400 MHz	DSCS III uplink	Mobile-satellite	F

Frequencies
Frequency	Bandwidth	Use	Service	Table
7600 MHz	-	DSCS III Beacon (A series satellites)	Mobile-satellite	F
7604.705882 MHz	-	DSCS III Beacon (B series satellites)	Mobile-satellite	F
8005.146484 MHz	-	DSCS III Channel 1 command uplink	Mobile-satellite	F
8370.146484 MHz	-	DSCS III Channel 5 command uplink	Mobile-satellite	F

External Links:

DSCS-3 (Gunter's Space Page)

DSCS-3 (fas.org)

DSCS III (Space Force)

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Wideband Global SATCOM (WGS) System

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.

Paired Frequency Bands
Paired Bands	Use	Service	Table
7250 - 7750 MHz	X-band downlink	Fixed-satellite	F
7900 - 8400 MHz	X-band uplink	Fixed-satellite	F
20.2 - 21.2 GHz	Ka-band downlink	Fixed-satellite	-
30 - 31 GHz	Ka-band uplink	Fixed-satellite	-

External Links:

WGS Article on Wikipedia

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NASA Deep Space Network (DSN)

According to NASA:

"The NASA Deep Space Network - or DSN - is an international network of antennas that supports interplanetary spacecraft missions and radio and radar astronomy observations for the exploration of the solar system and the universe. The network also supports selected Earth-orbiting missions.

"The DSN currently consists of three deep-space communications facilities placed approximately 120 degrees apart around the world: at Goldstone, in California's Mojave Desert; near Madrid, Spain; and near Canberra, Australia. This strategic placement permits constant observation of spacecraft as the Earth rotates, and helps to make the DSN the largest and most sensitive scientific telecommunications system in the world."

Frequency Bands
Band	Use	Service	Table
25.5 - 27 GHz	DSN K-Band Downlink (from spacecraft less than 2 million km from Earth)	Space Research (space-to-Earth)	F

Paired Frequency Bands
Paired Bands	Use	Service	Table
2025 - 2110 MHz	DSN S-Band Uplink (to spacecraft less than 2 million km from Earth)	Space Research (Earth-to-space)	F
2200 - 2290 MHz	DSN S-Band Downlink (from spacecraft less than 2 million km from Earth)	Space Research (space-to-Earth)	F
2110 - 2120 MHz	DSN S-Band Uplink (to spacecraft more than 2 million km from Earth)	Space Research (Earth-to-space)	F
2290 - 2300 MHz	DSN S-Band Downlink (from spacecraft more than 2 million km from Earth)	Space Research (deep space)	F
7145 - 7190 MHz	DSN X-Band Uplink (to spacecraft more than 2 million km from Earth)	Space Research (Earth-to-space)	F
8400 - 8450 MHz	DSN X-Band Downlink (from spacecraft more than 2 million km from Earth)	Space Research (deep space)	F
7190 - 7235 MHz	DSN X-Band Uplink (to spacecraft less than 2 million km from Earth)	Space Research (Earth-to-space)	F
8450 - 8500 MHz	DSN X-Band Downlink (from spacecraft less than 2 million km from Earth)	Space Research (space-to-Earth)	F
31.8 - 32.3 GHz	DSN Ka-Band Downlink (from spacecraft more than 2 million km from Earth)	Space Research (deep space)	F
34.2 - 34.7 GHz	DSN Ka-Band Uplink (to spacecraft more than 2 million km from Earth)	Space Research (Earth-to-space)	F

External Links:

NASA Deep Space Network

NASA DSN Frequency and Channel Assignments (DSN 810-005 part 201)

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GeoEye Imaging Satellites

GeoEye is a series of optical imaging satellites (see the Wikipedia article for more information).

Two GeoEye satellites (the first of which is already in orbit) operate in an orbit with an altitude of about 675 km, inclination of 98.114 deg, and a period of 1 hr 38 min. The second satellite is planned for launch in 2013. The two satellites will be placed 180 deg apart in orbit.

The satellites transmit with a peak power (EIRP) of 26.7 dBW for their data downlinks (375 MHz bandwidth), and -10 dBW for their telemetry downlink (120 kHz).

GeoEye is licensed by the U.S. FCC, callsign S2348. Its uplink facilities are in Herndon, VA, and North Pole, AK.

Frequencies
Frequency	Bandwidth	Use	Service	Table
2052 MHz	128 kHz	GeoEye telemetry uplink	Earth Exploration-satellite (Earth-to-space)	F
8185 MHz	375 MHz	GeoEye data downlink	Earth Exploration-satellite (space-to-Earth)	F
8386 MHz	120 kHz	GeoEye telemetry downlink	Earth Exploration-satellite (space-to-Earth)	F

External Links:

GeoEye (Wikipedia)

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Skybox-1 and Skybox-2 Earth Exploration-Satellite Service satellites

According to the FCC's license grant, Skybox-1 and Skybox-2 are authorized to transmit telemetry signals and remote-sensing data in the 8025-8400 MHz band (space-to-Earth) from circular orbits with altitudes from 450 to 637 km, depending on the launch vehicle used, and with inclination ranging between 85 and 100 degrees, and to receive command signals on center frequencies of 2081 MHz and 2083 MHz.

These satellites operate under FCC callsign S2862.

Frequencies
Frequency	Bandwidth	Use	Service	Table
2081 MHz	110 kHz	Skybox-1 and -2 command uplink (RHCP)	Earth Exploration-satellite (Earth-to-space)	N
2083 MHz	110 kHz	Skybox-1 and -2 command uplink (RHCP)	Earth Exploration-satellite (Earth-to-space)	N
8075 MHz	60 MHz	Skybox-1 and Skybox-2 payload downlink 1 (RHCP)	Earth Exploration-satellite (space-to-Earth)	N
8200 MHz	60 MHz	Skybox-1 and Skybox-2 payload downlink 2 (RHCP)	Earth Exploration-satellite (space-to-Earth)	N
8325 MHz	60 MHz	Skybox-1 and Skybox-2 payload downlink 3 (RHCP)	Earth Exploration-satellite (space-to-Earth)	N
8375 MHz	256 kHz	Skybox-1 and Skybox-2 TT&C channel 1 (RHCP)	Earth Exploration-satellite (space-to-Earth)	N
8380 MHz	256 kHz	Skybox-1 and Skybox-2 TT&C channel 2 (RHCP)	Earth Exploration-satellite (space-to-Earth)	N

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Skybox high-resolution imaging satellites

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.

Frequency Bands
Band	Use	Service	Table
2080.89 - 2081.11 MHz	Skybox Imaging telemetry uplink	Earth Exploration-satellite (Earth-to-space)	N
2082.89 - 2083.11 MHz	Skybox Imaging telemetry uplink	Earth Exploration-satellite (Earth-to-space)	N
8045 - 8105 MHz	Skybox Imaging data downlink	Earth Exploration-satellite (space-to-Earth)	N
8170 - 8230 MHz	Skybox Imaging data downlink	Earth Exploration-satellite (space-to-Earth)	N
8295 - 8355 MHz	Skybox Imaging data downlink	Earth Exploration-satellite (space-to-Earth)	N
8374.744 - 8375.256 MHz	Skybox Imaging telemetry downlink	Earth Exploration-satellite (space-to-Earth)	N
8379.744 - 8380.256 MHz	Skybox Imaging telemetry downlink	Earth Exploration-satellite (space-to-Earth)	N

External Links:

Skybox Imaging

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Possible new FSS and maritime mobile-satellite allocations, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9

1.9 to consider, in accordance with Resolution COM6/15 (WRC-12):

1.9.1 possible new allocations to the fixed-satellite service in the frequency bands 7 150-7 250 MHz (space-to-Earth) and 8 400-8 500 MHz (Earth-to-space), subject to appropriate sharing conditions;

1.9.2 the possibility of allocating the bands 7 375-7 750 MHz and 8 025-8 400 MHz to the maritime-mobile satellite service and additional regulatory measures, depending on the results of appropriate studies

Frequency Bands
Band	Use	Service	Table
7150 - 7250 MHz	WRC-15 Agenda Item 1.9.1	Fixed-satellite (space-to-Earth)	-
8400 - 8500 MHz	WRC-15 Agenda Item 1.9.1	Fixed-satellite (Earth-to-space)	-

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Possible allocations for FSS and maritime mobile-satellite service, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9

Frequency Bands
Band	Use	Service	Table
7150 - 7250 MHz	Agenda Item 1.9.1	Fixed-satellite (space-to-Earth)	-
7375 - 7750 MHz	Agenda Item 1.9.2 (maritime mobile-satellite)	Mobile-satellite	-
8025 - 8400 MHz	Agenda Item 1.9.2 (maritime mobile-satellite)	Mobile-satellite	-
8400 - 8500 MHz	Agenda Item 1.9.1	Fixed-satellite (Earth-to-space)	-

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Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	8.025 GHz	8.2125 GHz	8.4 GHz
Wavelength	3.7 cm	3.7 cm	3.6 cm
Band designator(s)	SHF; X-band (IEEE)	SHF; X-band (IEEE)	SHF; X-band (IEEE)
Isotropic collecting area	1.1 cm²	1.1 cm²	1.0 cm²
Free space loss (1 m)	50.7 dB	50.7 dB	50.7 dB
Free space loss (1 km)	110.7 dB	110.7 dB	110.7 dB
Free space loss (10 km)	130.7 dB	130.7 dB	130.7 dB
Free space loss (100 km)	150.7 dB	150.7 dB	150.7 dB
Free space loss (1000 km)	170.7 dB	170.7 dB	170.7 dB
Free space loss (35,786 km = GEO orbit)	201.8 dB	201.8 dB	201.8 dB
Free space loss (378,370 km = Moon)	222.3 dB	222.3 dB	222.3 dB