Allocations

 
U.S. Non-Federal-Government Allocations
25.5 - 27 GHz
Inter-satellite 5.536
Standard frequency and time signal-satellite (Earth-to-space)

FCC Rule Parts:
RF Devices (15)

U.S. Federal Government Allocations
25.5 - 27 GHz
EARTH EXPLORATION-SATELLITE (space-to-Earth)
FIXED
INTER-SATELLITE 5.536
MOBILE
SPACE RESEARCH (space-to-Earth)
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 1 Allocations
25.5 - 27 GHz
EARTH EXPLORATION-SATELLITE (space-to-Earth) 5.536B
FIXED
INTER-SATELLITE 5.536
MOBILE
SPACE RESEARCH (space-to-Earth) 5.536C
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 2 Allocations
25.5 - 27 GHz
EARTH EXPLORATION-SATELLITE (space-to-Earth) 5.536B
FIXED
INTER-SATELLITE 5.536
MOBILE
SPACE RESEARCH (space-to-Earth) 5.536C
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 3 Allocations
25.5 - 27 GHz
EARTH EXPLORATION-SATELLITE (space-to-Earth) 5.536B
FIXED
INTER-SATELLITE 5.536
MOBILE
SPACE RESEARCH (space-to-Earth) 5.536C
Standard frequency and time signal-satellite (Earth-to-space)


SpectrumWiki


Footnotes


5.536 Use of the 25.25-27.5 GHz band by the inter-satellite service is limited to space research and Earth exploration-satellite applications, and also transmissions of data originating from industrial and medical activities in space.

5.536A Administrations operating earth stations in the Earth exploration-satellite service or the space research service shall not claim protection from stations in the fixed and mobile services operated by other administrations. In addition, earth stations in the Earth exploration-satellite service or in the space research service should be operated taking into account the most recent version of Recommendation ITU-R SA.1862. (WRC-12)

5.536B In Saudi Arabia, Austria, Belgium, Brazil, Bulgaria, China, Korea (Rep. of), Denmark, Egypt, United Arab Emirates, Estonia, Finland, Hungary, India, Iran (Islamic Republic of), Ireland, Israel, Italy, Jordan, Kenya, Kuwait, Lebanon, Libya, Liechtenstein, Lithuania, Moldova, Norway, Oman, Uganda, Pakistan, the Philippines, Poland, Portugal, the Syrian Arab Republic, Dem. People’s Rep. of Korea, Slovakia, the Czech Rep., Romania, the United Kingdom, Singapore, Sweden, Switzerland, Tanzania, Turkey, Viet Nam and Zimbabwe, earth stations operating in the Earth exploration-satellite service in the band 25.5-27 GHz shall not claim protection from, or constrain the use and deployment of, stations of the fixed and mobile services. (WRC-12)

5.536C In Algeria, Saudi Arabia, Bahrain, Botswana, Brazil, Cameroon, Comoros, Cuba, Djibouti, Egypt, United Arab Emirates, Estonia, Finland, Iran (Islamic Republic of), Israel, Jordan, Kenya, Kuwait, Lithuania, Malaysia, Morocco, Nigeria, Oman, Qatar, Syrian Arab Republic, Somalia, Sudan, South Sudan, Tanzania, Tunisia, Uruguay, Zambia and Zimbabwe, earth stations operating in the space research service in the band 25.5-27 GHz shall not claim protection from, or constrain the use and deployment of, stations of the fixed and mobile services. (WRC-12)

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.

SpectrumWiki

 
NASA Deep Space Network (DSN)
NASA Tracking and Data Relay Satellite System (TDRSS)
Unlicensed Level Probing Radars
Airport Body Scanners
Possible MSS Allocations (WRC-15 Agenda Item 1.10)


Related Documents, Links, and Multimedia:
FCC Proceeding (2)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 25.5 GHz 26.25 GHz 27 GHz
Wavelength 1.2 cm 1.1 cm 1.1 cm
Band designator(s) SHF; K-band (IEEE) SHF; K-band (IEEE) SHF; Ka-band (IEEE)
Isotropic collecting area 11.0 mm2 10.4 mm2 9.8 mm2
Free space loss (1 m) 60.6 dB 60.8 dB 61.1 dB
Free space loss (1 km) 120.6 dB 120.8 dB 121.1 dB
Free space loss (10 km) 140.6 dB 140.8 dB 141.1 dB
Free space loss (100 km) 160.6 dB 160.8 dB 161.1 dB
Free space loss (1000 km) 180.6 dB 180.8 dB 181.1 dB
Free space loss
(35,786 km = GEO orbit)
211.7 dB 211.9 dB 212.2 dB
Free space loss (378,370 km = Moon) 232.1 dB 232.4 dB 232.6 dB