Allocations

 
U.S. Non-Federal-Government Allocations
406.1 - 410 MHz
RADIO ASTRONOMY US74


U.S. Federal Government Allocations
406.1 - 410 MHz
FIXED
MOBILE
RADIO ASTRONOMY US74


ITU Region 1 Allocations
406.1 - 410 MHz
FIXED
MOBILE except aeronautical mobile
RADIO ASTRONOMY


ITU Region 2 Allocations
406.1 - 410 MHz
FIXED
MOBILE except aeronautical mobile
RADIO ASTRONOMY


ITU Region 3 Allocations
406.1 - 410 MHz
FIXED
MOBILE except aeronautical mobile
RADIO ASTRONOMY


SpectrumWiki


Footnotes


5.149 In making assignments to stations of other services to which the bands:

13360-13410 kHz,22.81-22.86 GHz,
25550-25670 kHz,23.07-23.12 GHz,
37.5-38.25 MHz,31.2-31.3 GHz,
73-74.6 MHz31.5-31.8 GHz
  in Regions 1 and 3,  in Regions 1 and 3,
150.05-153 MHz36.43-36.5 GHz,
  in Region 1,42.5-43.5 GHz,
322-328.6 MHz,48.94-49.04 GHz,
406.1-410 MHz,76-86 GHz,
608-614 MHz in92-94 GHz,
  Regions 1 and 3,94.1-100 GHz,
1330-1400 MHz,102-109.5 GHz,
1610.6-1613.8 MHz,111.8-114.25 GHz,
1660-1670 MHz,128.33-128.59 GHz,
1718.8-1722.2 MHz,129.23-129.49 GHz,
2655-2690 MHz,130-134 GHz,
3260-3267 MHz,136-148.5 GHz,
3332-3339 MHz,151.5-158.5 GHz,
3345.8-3352.5 MHz,168.59-168.93 GHz,
4825-4835 MHz,171.11-171.45 GHz,
4950-4990 MHz,172.31-172.65 GHz,
4990-5000 MHz,173.52-173.85 GHz,
6650-6675.2 MHz,195.75-196.15 GHz,
10.6-10.68 GHz,209-226 GHz,
14.47-14.5 GHz,241-250 GHz,
22.01-22.21 GHz,252-275 GHz
22.21-22.5 GHz,

are allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 4.5 and 4.6 and Article 29). (WRC-07)

US13 The following center frequencies, each with a channel bandwidth not greater than 12.5 kHz, are available for assignment to non-Federal fixed stations for the specific purpose of transmitting hydrological and meteorological data in cooperation with Federal agencies, subject to the condition that harmful interference will not be caused to Federal stations:

Hydro Channels (MHz)
169.425 169.4375 169.450 169.4625 169.475 169.4875 169.500 169.5125 169.525 170.225 170.2375 170.250 170.2625 170.275 170.2875 170.300 170.3125 170.325 171.025 171.0375 171.050 171.0625 171.075 171.0875 171.100 171.1125 171.125 171.825 171.8375 171.850 171.8625 171.875 171.8875 171.900 171.9125 171.925 406.1250 406.1750 412.6625 412.6750 412.6875 412.7125 412.7250 412.7375 412.7625 412.7750 415.1250 415.1750

New assignments on the frequencies 406.125 MHz and 406.175 MHz are to be primarily for paired operations with the frequencies 415.125 MHz and 415.175 MHz, respectively.

US74 In the bands 25.55-25.67, 73.0-74.6, 406.1-410.0, 608-614, 1400-1427 (see US368), 1660.5-1670.0, 2690-2700, and 4990-5000 MHz, and in the bands 10.68-10.7, 15.35-15.4, 23.6-24.0, 31.3-31.5, 86-92, 100-102, 109.5-111.8, 114.25-116, 148.5-151.5, 164-167, 200-209, and 250-252 GHz, the radio astronomy service shall be protected from unwanted emissions only to the extent that such radiation exceeds the level which would be present if the offending station were operating in compliance with the technical standards or criteria applicable to the service in which it operates. Radio astronomy observations in these bands are performed at the locations listed in US385.

US117 In the band 406.1-410 MHz, the following provisions shall apply:

  • (a) Stations in the fixed and mobile services are limited to a transmitter output power of 125 watts, and new authorizations for stations, other than mobile stations, are subject to prior coordination by the applicant in the following areas:
    • (1) Within Puerto Rico and the U.S. Virgin Islands, contact Spectrum Manager, Arecibo Observatory, HC3 Box 53995, Arecibo, PR 00612. Phone: 787-878-2612, Fax: 787-878-1861, E-mail: prcz@naic.edu.
    • (2) Within 350 km of the Very Large Array (34° 04' 44" N, 107° 37' 06" W), contact Spectrum Manager, National Radio Astronomy Observatory, P.O. Box O, 1003 Lopezville Road, Socorro, NM 87801. Phone: 505-835-7000, Fax: 505-835-7027, E-mail: nrao-rfi@nrao.edu.
    • (3) Within 10 km of the Table Mountain Observatory (40° 07' 50" N, 105° 14' 40" W) and for operations only within the sub-band 407-409 MHz, contact Radio Frequency Manager, Department of Commerce, 325 Broadway, Boulder, CO 80305. Phone: 303-497-4619, Fax: 303-497-6982, E-mail: frequencymanager@its.bldrdoc.gov.
  • (b) Non-Federal use is limited to the radio astronomy service and as provided by US13.


G5 In the bands 162.0125-173.2, 173.4-174, 406.1-410 and 410-420 MHz, use by the military services is limited by the provisions specified in the channeling plans shown in Sections 4.3.7 and 4.3.9 of the NTIA Manual.

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.

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Emergency Position Indicating Radiobeacon (EPIRB); Emergency Locator Transmitter (ELT); Personal Locating Beacon (PLB)


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Occupancy Measurements (10)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 406.1 MHz 408.05 MHz 410 MHz
Wavelength 73.8 cm 73.5 cm 73.1 cm
Band designator(s) UHF UHF UHF
Isotropic collecting area 433.7 cm2 429.5 cm2 425.5 cm2
Free space loss (1 m) 24.6 dB 24.7 dB 24.7 dB
Free space loss (1 km) 84.6 dB 84.7 dB 84.7 dB
Free space loss (10 km) 104.6 dB 104.7 dB 104.7 dB
Free space loss (100 km) 124.6 dB 124.7 dB 124.7 dB
Free space loss (1000 km) 144.6 dB 144.7 dB 144.7 dB
Free space loss
(35,786 km = GEO orbit)
175.7 dB 175.7 dB 175.8 dB
Free space loss (378,370 km = Moon) 196.2 dB 196.2 dB 196.3 dB