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


Footnotes


Could not find US64

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 servce 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)
2019 World Radiocommunication Conference (WRC-19) Agenda Item 1.2
WRC-19 Agenda Item 1.2


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