Radio spectrum allocations

Footnotes

• 5.440A   In Region 2 (except Brazil, Cuba, French overseas departments and communities, Guatemala, Paraguay, Uruguay and Venezuela), and in Australia, the band 4 400-4 940 MHz may be used for aeronautical mobile telemetry for flight testing by aircraft stations (see No. 1.83). Such use shall be in accordance with Resolution 416 (WRC 07) and shall not cause harmful interference to, nor claim protection from, the fixed-satellite and fixed services. Any such use does not preclude the use of this band by other mobile service applications or by other services to which this band is allocated on a co-primary basis and does not establish priority in the Radio Regulations. (WRC-07)

• US113   Radio astronomy observations of the formaldehyde line frequencies 4825-4835 MHz and 14.47-14.5 GHz may be made at certain radio astronomy observatories as indicated below:

  Bands to be Observed
  4 GHz	14 GHz	Observatory
  X		National Astronomy and Ionosphere Center (NAIC), Arecibo, PR
  X	X	National Radio Astronomy Observatory (NRAO), Green Bank, WV
  X	X	NRAO, Socorro, NM
  X		Allen Telescope Array (ATA), Hat Creek, CA
  X	X	Owens Valley Radio Observatory (OVRO), Big Pine, CA
  X	X	NRAO's ten Very Long Baseline Array (VLBA) stations (see US131)
  X	X	University of Michigan Radio Astronomy Observatory, Stinchfield Woods, MI
  X		Pisgah Astronomical Research Institute, Rosman, NC

      Every practicable effort will be made to avoid the assignment of frequencies to stations in the fixed or mobile services in these bands. Should such assignments result in harmful interference to these observations, the situation will be remedied to the extent practicable.

• US245   In the bands 3600-3650 MHz (space-to-Earth), 4500-4800 MHz (space-to-Earth), and 5850-5925 MHz (Earth-to-space), the use of the non-Federal fixed-satellite service is limited to international inter-continental systems and is subject to case-by-case electromagnetic compatibility analysis. The FCC's policy for these bands is codified at 47 CFR 2.108.

• US342   In making assignments to stations of other services to which the bands:

  13 360-13 410 kHz	42.77-42.87 GHz*
  25 550-25 670 kHz	43.07-43.17 GHz*
  37.5-38.25 MHz	43.37-43.47 GHz*
  322-328.6 MHz*	48.94-49.04 GHz*
  1330-1400 MHz*	76-86 GHz
  1610.6-1613.8 MHz*	92-94 GHz
  1660-1660.5 MHz*	94.1-100 GHz
  1668.4-1670 MHz*	102-109.5 GHz
  3260-3267 MHz*	111.8-114.25 GHz
  3332-3339 MHz*	128.33-128.59 GHz*
  3345.8-3352.5 MHz*	129.23-129.49 GHz*
  4825-4835 MHz*	130-134 GHz
  4950-4990 MHz	136-148.5 GHz
  6650-6675.2 MHz*	151.5-158.5 GHz
  14.47-14.5 GHz*	168.59-168.93 GHz*
  22.01-22.21 GHz*	171.11-171.45 GHz*
  22.21-22.5 GHz	172.31-172.65 GHz*
  22.81-22.86 GHz*	173.52-173.85 GHz*
  23.07-23.12 GHz*	195.75-196.15 GHz*
  31.2-31.3 GHz	209-226 GHz
  36.43-36.5 GHz*	241-250 GHz
  42.5-43.5 GHz	252-275 GHz

  are allocated (*indicates radio astronomy use for spectral line observations), all practicable steps shall be taken 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 ITU Radio Regulations at Nos. 4.5 and 4.6 and Article 29).