Allocations

 
U.S. Non-Federal-Government Allocations
403 - 406 MHz
METEOROLOGICAL AIDS (radiosonde) US70

FCC Rule Parts:
MedRadio (95I)

U.S. Federal Government Allocations
403 - 406 MHz
METEOROLOGICAL AIDS (radiosonde) US70


ITU Region 1 Allocations
403 - 406 MHz
METEOROLOGICAL AIDS
Fixed
Mobile except aeronautical mobile


ITU Region 2 Allocations
403 - 406 MHz
METEOROLOGICAL AIDS
Fixed
Mobile except aeronautical mobile


ITU Region 3 Allocations
403 - 406 MHz
METEOROLOGICAL AIDS
Fixed
Mobile except aeronautical mobile


SpectrumWiki

Band Uses (403 - 406 MHz)


Footnotes

5.265   In the frequency band 403-410 MHz, Resolution 205 (Rev.WRC 19) applies. (WRC 19)

US64   (a) In the band 401-406 MHz, the mobile, except aeronautical mobile, service is allocated on a secondary basis and is limited to, with the exception of military tactical mobile stations, Medical Device Radiocommunication Service (MedRadio) operations. MedRadio stations are authorized by rule on the condition that harmful interference is not caused to stations in the meteorological aids, meteorological-satellite, and Earth exploration-satellite services, and that MedRadio stations accept interference from stations in the meteorological aids, meteorological-satellite, and Earth exploration-satellite services.

    (b) The bands 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz are also allocated on a secondary basis to the mobile, except aeronautical mobile, service. The use of this allocation is limited to MedRadio operations. MedRadio stations are authorized by rule and operate in accordance with 47 CFR part 95.

US70   The meteorological aids service allocation in the band 400.15-406.0 MHz does not preclude the operation therein of associated ground transmitters.

G6   Military tactical fixed and mobile operations may be conducted nationally on a secondary basis: (a) To the meteorological aids service in the band 403-406 MHz; and (b) To the radio astronomy service in the band 406.1-410 MHz. Such fixed and mobile operations are subject to local coordination to ensure that harmful interference will not be caused to the services to which the bands are allocated.


SpectrumWiki

 
Emergency Position Indicating Radiobeacon (EPIRB); Emergency Locator Transmitter (ELT); Personal Locating Beacon (PLB)
WRC-19 Agenda Item 1.2
Radiosondes
IEEE 802.15.4 HRP UWB




Related Documents, Links, and Multimedia:
Occupancy Measurements (10)




Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 403 MHz 404.5 MHz 406 MHz
Wavelength 74.4 cm 74.1 cm 73.8 cm
Band designator(s) UHF UHF UHF
Isotropic collecting area 440.4 cm2 437.1 cm2 433.9 cm2
Free space loss (1 m) 24.6 dB 24.6 dB 24.6 dB
Free space loss (1 km) 84.6 dB 84.6 dB 84.6 dB
Free space loss (10 km) 104.6 dB 104.6 dB 104.6 dB
Free space loss (100 km) 124.6 dB 124.6 dB 124.6 dB
Free space loss (1000 km) 144.6 dB 144.6 dB 144.6 dB
Free space loss
(35,786 km = GEO orbit)
175.6 dB 175.7 dB 175.7 dB
Free space loss (378,370 km = Moon) 196.1 dB 196.1 dB 196.2 dB
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