Allocations

 
U.S. Non-Federal-Government Allocations
8.65 - 9 GHz
RADIOLOCATION


U.S. Federal Government Allocations
8.65 - 9 GHz
RADIOLOCATION G59


ITU Region 1 Allocations
8.75 - 8.85 GHz
RADIOLOCATION
AERONAUTICAL RADIONAVIGATION 5.470


ITU Region 2 Allocations
8.75 - 8.85 GHz
RADIOLOCATION
AERONAUTICAL RADIONAVIGATION 5.470


ITU Region 3 Allocations
8.75 - 8.85 GHz
RADIOLOCATION
AERONAUTICAL RADIONAVIGATION 5.470


SpectrumWiki


Footnotes


5.470 The use of the band 8750-8850 MHz by the aeronautical radionavigation service is limited to airborne Doppler navigation aids on a centre frequency of 8800 MHz.

5.471 Additional allocation: in Algeria, Germany, Bahrain, Belgium, China, Egypt, the United Arab Emirates, France, Greece, Indonesia, Iran (Islamic Republic of), the Libyan Arab Jamahiriya, the Netherlands, Qatar and Sudan, the bands 8825-8850 MHz and 9000-9200 MHz are also allocated to the maritime radionavigation service, on a primary basis, for use by shore-based radars only. (WRC-07)

US53 In view of the fact that the band 13.25-13.4 GHz is allocated to doppler navigation aids, Federal and non-Federal airborne doppler radars in the aeronautical radionavigation service are permitted in the band 8750-8850 MHz only on the condition that they must accept any interference that may be experienced from stations in the radiolocation service in the band 8500-10000 MHz.

G59 In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Federal non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments.

SpectrumWiki

 
Airport Surface Detection Radars (ASDE-X)
Airborne Doppler navigation aids
Possible extension of EESS (active) allocation (WRC-15 Agenda Item 1.12)


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Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 8.65 GHz 8.825 GHz 9 GHz
Wavelength 3.5 cm 3.4 cm 3.3 cm
Band designator(s) SHF; X-band (IEEE) SHF; X-band (IEEE) SHF; X-band (IEEE)
Isotropic collecting area 1.0 cm2 0.9 cm2 0.9 cm2
Free space loss (1 m) 51.3 dB 51.4 dB 51.4 dB
Free space loss (1 km) 111.3 dB 111.4 dB 111.4 dB
Free space loss (10 km) 131.3 dB 131.4 dB 131.4 dB
Free space loss (100 km) 151.3 dB 151.4 dB 151.4 dB
Free space loss (1000 km) 171.3 dB 171.4 dB 171.4 dB
Free space loss
(35,786 km = GEO orbit)
202.4 dB 202.4 dB 202.5 dB
Free space loss (378,370 km = Moon) 222.8 dB 222.9 dB 222.9 dB