Allocations

 
U.S. Non-Federal-Government Allocations
1400 - 1427 MHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY US74
SPACE RESEARCH (passive)


U.S. Federal Government Allocations
1400 - 1427 MHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY US74
SPACE RESEARCH (passive)


ITU Region 1 Allocations
1400 - 1427 MHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


ITU Region 2 Allocations
1400 - 1427 MHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


ITU Region 3 Allocations
1400 - 1427 MHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


SpectrumWiki


Footnotes


5.340 All emissions are prohibited in the following bands:

1400-1427 MHz,
2690-2700 MHz, except those provided for by No. 5.422,
10.68-10.7 GHz, except those provided for by No. 5.483,
15.35-15.4 GHz, except those provided for by No. 5.511,
23.6-24 GHz,
31.3-31.5 GHz,
31.5-31.8 GHz, in Region 2,
48.94-49.04 GHz, from airborne stations,
50.2-50.4 GHz,*
52.6-54.25 GHz,
86-92 GHz,
100-102 GHz,
109.5-111.8 GHz,
114.25-116 GHz,
148.5-151.5 GHz,
164-167 GHz,
182-185 GHz,
190-191.8 GHz,
200-209 GHz,
226-231.5 GHz,
250-252 GHz.

*5.340.1 The allocation to the Earth exploration-satellite service (passive) and the space research service (passive) in the band 50.2-50.4 GHz should not impose undue constraints on the use of the adjacent bands by the primary allocated services in those bands.

5.341 In the bands 1400-1727 MHz, 101-120 GHz and 197-220 GHz, passive research is being conducted by some countries in a programme for the search for intentional emissions of extraterrestrial origin.

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.

US246 No station shall be authorized to transmit in the following bands:

  • 73-74.6 MHz,
  • 608-614 MHz, except for medical telemetry equipment,1
  • 1400-1427 MHz,
  • 1660.5-1668.4 MHz,
  • 2690-2700 MHz,
  • 4990-5000 MHz,
  • 10.68-10.7 GHz,
  • 15.35-15.4 GHz,
  • 23.6-24 GHz,
  • 31.3-31.8 GHz,
  • 50.2-50.4 GHz,
  • 52.6-54.25 GHz,
  • 86-92 GHz,
  • 100-102 GHz,
  • 109.5-111.8 GHz,
  • 114.25-116 GHz,
  • 148.5-151.5 GHz,
  • 164-167 GHz,
  • 182-185 GHz,
  • 190-191.8 GHz,
  • 200-209 GHz,
  • 226-231.5 GHz,
  • 250-252 GHz.

1Medical telemetry equipment shall not cause harmful interference to radio astronomy operations in the band 608-614 MHz and shall be coordinated under the requirements found in 47 CFR 95.1119.


SpectrumWiki

 
Radio Astronomy (1400-1427 MHz)
Wireless Medical Telemetry Service (WMTS)
Soil Moisture Active Passive (SMAP) Satellite
WRC-27 possible allocations for low-data rate NGSO MSS systems


Related Documents, Links, and Multimedia:
Occupancy Measurements (10)
Other (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 1400 MHz 1413.5 MHz 1427 MHz
Wavelength 21.4 cm 21.2 cm 21.0 cm
Band designator(s) UHF; L-band (IEEE) UHF; L-band (IEEE) UHF; L-band (IEEE)
Isotropic collecting area 36.5 cm2 35.8 cm2 35.1 cm2
Free space loss (1 m) 35.4 dB 35.5 dB 35.5 dB
Free space loss (1 km) 95.4 dB 95.5 dB 95.5 dB
Free space loss (10 km) 115.4 dB 115.5 dB 115.5 dB
Free space loss (100 km) 135.4 dB 135.5 dB 135.5 dB
Free space loss (1000 km) 155.4 dB 155.5 dB 155.5 dB
Free space loss
(35,786 km = GEO orbit)
186.4 dB 186.5 dB 186.6 dB
Free space loss (378,370 km = Moon) 206.9 dB 207.0 dB 207.1 dB