GBT C-Band (3

C-Band (3950 - 5850 MHz) SPECTRUM SUMMARY

Frequency (MHz): 3700-4200

Allocated Use: Fixed and Fixed-Satellite (Space-to-Earth)

Remarks: Frequencies in the bands 3700-4200 MHz and 5925-6425 MHz may also be assigned to stations in the international fixed public and international control services located in Puerto Rico, the U.S. Virgin Islands, and Navassa Island.

Frequency (MHz): 4200-4400

Allocated Use: Aeronautical Radionavigation

Remarks: The standard frequency and time signal-satellite service may be authorized to use the frequency 4202 MHz for space-to-Earth transmissions and the frequency 6427 MHz for Earth-to-space transmissions. Such transmissions shall be confined within the limits of ± 2 MHz of these frequencies.

The use of the band 4200-4400 MHz by the aeronautical radionavigation service is reserved exclusively for airborne radio altimeters. Experimental stations will not be authorized to develop equipment for operational use in this band other than equipment related to altimeter stations. However, passive sensing in the Earth-exploration satellite and space research services may be authorized in this band on a secondary basis (no protection is provided from the radio altimeters).

Frequency (MHz): 4400-4500

Allocated Use: Fixed and Mobile

Remarks:

Frequency (MHz): 4500-4800

Allocated Use: Fixed, Mobile and Fixed-Satellite (Space-to-Earth)

Remarks: 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.

Frequency (MHz): 4800-4940

Allocated Use: Fixed and Mobile

Remarks: Radio astronomy observations of the formaldehyde line frequencies 4825-4835 MHz and 14.470–14.500 GHz may be made at certain radio astronomy observatories as indicated below: 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.

In making assignments to stations of other services to which the bands: 13360-13410 kHz 22.01-22.21 GHz* 111.8-114.25 GHz 25550-25670 kHz 22.21-22.5 GHz 128.33-128.59 GHz* 37.5-38.25 MHz 22.81-22.86 GHz* 129.23-129.49 GHz* 322-328.6 MHz* 23.07-23.12 GHz* 130-134 GHz 1330-1400 MHz* 31.2-31.3 GHz 136-148.5 GHz 1610.6-1613.8 MHz* 36.43-36.5 GHz* 151.5-158.5 GHz 1660-1660.5 MHz* 42.5-43.5 GHz 168.59-168.93 GHz* 1668.4-1670 MHz* 42.77-43.17 GHz* 171.11-171.45 GHz* 3260-3267 MHz* 43.07-43.17 GHz* 172.31-172.65 GHz* 3332-3339 MHz* 43.37-43.47 GHz* 173.52-173.85 GHz* 3345.8-3352.5 MHz* 48.94-49.04 GHz* 195.75-196.15 GHz* 4825-4835 MHz* 76-86 GHz 209-226 GHz 4950-4990 MHz 92-94 GHz 241-250 GHz 6650-6675.2 MHz* 94.1-100 GHz 252-275 GHz 14.47-14.5 GHz* 102-109.5 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.

Frequency (MHz): 4940-4990

Allocated Use: Private Land Mobile and Fixed Microwave

Remarks: The bands 1370-1400 MHz, 2640-2655 MHz, 4950-4990 MHz and 15.20-15.35 GHz are also allocated to the space research (passive) and earth exploration-satellite (passive) services on a secondary basis.

Radio astronomy observations may be made in the bands 1350-1400 MHz, 1718.8-1722.2 MHz, and 4950-4990 MHz on an unprotected basis at the following radio astronomy observatories: Allen Telescope Array, Hat Creek, California Rectangle between latitudes 40° 00' N and 42° 00' N and between longitudes 120° 15' W and 122° 15' W. NASA Goldstone Deep Space Communications Complex, Goldstone, California 80 kilometers (50 mile) radius centered on latitude 35° 18' N, longitude 116° 54' W. National Astronomy and Ionosphere Center, Arecibo, Puerto Rico Rectangle between latitudes 17° 30' N and 19° 00' N and between longitudes 65° 10' W and 68° 00' W. National Radio Astronomy Observatory, Socorro, New Mexico Rectangle between latitudes 32° 30' N and 35° 30' N and between longitudes 106° 00' W and 109° 00' W. National Radio Astronomy Observatory, Green Bank, West Virginia Rectangle between latitudes 37° 30' N and 39° 15' N and between longitudes 78° 30' W and 80° 30' W. National Radio Astronomy Observatory, Very Long Baseline Array Stations 80 kilometer radius centered on: Latitude (North) Longitude (West) Brewster, WA 48° 08' 119° 41' Fort Davis, TX 30° 38' 103° 57' Hancock, NH 42° 56' 71° 59' Kitt Peak, AZ 31° 57' 111° 37' Los Alamos, NM 35° 47' 106° 15' Mauna Kea, HI 19° 48' 155° 27' North Liberty, IA 41° 46' 91° 34' Owens Valley, CA 37° 14' 118° 17' Pie Town, NM 34° 18' 108° 07' Saint Croix, VI 17° 46' 64° 35' Owens Valley Radio Observatory, Big Pine, California Two contiguous rectangles, one between latitudes 36° 00' N and 37° 00' N and between longitudes 117° 40' W and 118° 30' W and the second between latitudes 37° 00' N and 38° 00' N and between longitudes 118° 00' W and 118° 50' W. In the bands 1350-1400 MHz and 4950-4990 MHz, every practicable effort will be made to avoid the assignment of frequencies to stations in the fixed and mobile services that could interfere with radio astronomy observations within the geographic areas given above. In addition, every practicable effort will be made to avoid assignment of frequencies in these bands to stations in the aeronautical mobile service which operate outside of those geographic areas, but which may cause harmful interference to the listed observatories. Should such assignments result in harmful interference to these observatories, the situation will be remedied to the extent practicable.

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

In the bands 2395-2400 MHz, 2402-2417 MHz, and 4940-4990 MHz, Federal operations may be authorized on a non-interference basis to authorized non-Federal operations, but shall not hinder the implementation of any non-Federal operations.

Frequency (MHz): 4990-5000

Allocated Use: Radio Astronomy and Space Research (passive)

Remarks: No station shall be authorized to transmit in the following bands: 73-74.6 MHz, 608-614 MHz, except for medical telemetry equipment,18 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.

Frequency (MHz): 5000-5250

Allocated Use: Aeronautical Radionavigation, Fixed-Satellite (Earth-to-Space)

Remarks: Additional allocation: The bands 1610-1626.5 MHz and 5000-5150 MHz are also allocated to the aeronautical mobile-satellite (R) service on a primary basis, subject to agreement obtained under No. 9.21.

Additional allocation: the band 5091-5150 MHz is also allocated to the fixed-satellite service (Earth-to-space) on a primary basis. This allocation is limited to feeder links of non-geostationary

mobile-satellite systems in the mobile-satellite service and is subject to coordination under No. 9.11A.

In the band 5091-5150 MHz, the following conditions also apply:– prior to 1 January 2018, the use of the band 5091-5150 MHz by feeder links of non-geostationary-satellite systems in the mobile-satellite service shall be made in accordance with Resolution 114 (Rev.WRC-03);– prior to 1 January 2018, the requirements of existing and planned international standard systems for the aeronautical radionavigation service which cannot be met in the 5000-5091 MHz band, shall take precedence over other uses of this band;– after 1 January 2012, no new assignments shall be made to earth stations providing feeder links of non-geostationary mobile-satellite systems;– after 1 January 2018, the fixed-satellite service will become secondary to the aeronautical radionavigation service.

The allocation to the fixed-satellite service (Earth-to-space) is limited to feeder links of nongeostationary-satellite systems in the mobile-satellite service and is subject to coordination under

No. 9.11A.

In the bands 1670-1690, 5000-5250 MHz and 10.7-11.7, 15.1365-15.35, 15.4-15.7, 22.5-22.55, 24-24.05, 31.0-31.3, 31.8-32.0, 40.5-42.5, 116-122.25, 123-130, 158.5-164, 167-168, 191.8-200, and 252-265 GHz, applicants for airborne or space station assignments are urged to take all practicable steps to protect radio astronomy observations in the adjacent bands from harmful interference; however, US74 applies.

Aeronautical mobile communications which are an integral part of aeronautical radionavigation systems may be satisfied in the bands 1559-1626.5 MHz, 5000-5250 MHz and 15.4-15.7 GHz.

The sub-band 5150-5216 MHz is also allocated for space-to-Earth transmissions in the fixed satellite service for feeder links in conjunction with the radiodetermination satellite service operating in the bands 1610-1626.5 MHz and 2483.5-2500 MHz. The total power flux density at the Earth’s surface shall in no case exceed 159 dBW/m2 per 4 kHz for all angles of arrival.

In the band 5091-5250 MHz, non-Federal earth stations in the fixed-satellite service (Earth-to-space) shall be coordinated through the Frequency Assignment Subcommittee (see Recommendation ITU-R S.1342). In order to better protect the operation of the international standard system (micro-wave landing system) in the band 5000-5091 MHz, non-Federal tracking and telecommand operations should be conducted in the band 5150-5250 MHz.

Frequency (MHz): 5250-5350

Allocated Use: Earth Exploration Satellite (active), Radiolocation, Space Research (active), and RF Part 15 Devices

Remarks: The Earth exploration-satellite (active) and space research (active) services in the frequency band 5250-5350 MHz shall not claim protection from the radiolocation service. No. 5.43A does not apply.

Frequency (MHz): 5350-5460

Allocated Use: Earth Exploration Satellite (active), Space Research (active), Aeronautical Radionavigation and Radiolocation

Remarks: The Earth exploration-satellite service (active) operating in the band 5350-5570 MHz and space research service (active) operating in the band 5460-5570 MHz shall not cause harmful interference to the aeronautical radionavigation service in the band 5350-5460 MHz, the radionavigation service in the band 5460-5470 MHz and the maritime radionavigation service in the band 5470- 5570 MHz.

The use of the band 5350-5470 MHz by the aeronautical radionavigation service is limited to airborne radars and associated airborne beacons.

Federal stations in the space research service (active) operating in the band 5350-5460 MHz shall not cause harmful interference to, nor claim protection from, Federal and non-Federal stations in

the aeronautical radionavigation service nor Federal stations in the radiolocation service.

Federal radiolocation in the bands 1215-1300, 2900-3100, 5350-5650 and 9300-9500 MHz is primarily for the military services; however, limited secondary use is permitted by other Federal agencies in support of experimentation and research programs. In addition, limited secondary use is permitted for survey operations in the band 2900-3100 MHz.

Federal stations in the radiolocation service operating in the band 5350-5470 MHz, shall not cause harmful interference to, nor claim protection from, Federal stations in the aeronautical radionavigation service operating in accordance with ITU Radio Regulation No. 5.449.

Frequency (MHz): 5460-5470

Allocated Use: Radionavigation, Earth Exploration Satellite (active), Space Research (active) and Radiolocation

The use of the band 5350-5470 MHz by the aeronautical radionavigation service is limited to airborne radars and associated airborne beacons.

In the band 5460-5470 MHz, the non-Federal radiolocation service may be authorized on the condition that it does not cause harmful interference to the aeronautical or maritime radionavigation services or to the Federal radiolocation service.

The use of the band 5460-5650 MHz by the maritime radionavigation service is limited to shipborne radars.

Frequency (MHz): 5470-5570

Allocated Use: Maritime Radionavigation, Earth Exploration Satellite (active), Space Research (active) and Radiolocation

In the band 5470-5650 MHz, the radiolocation service may be authorized for non-Federal use on the condition that harmful interference is not caused to the maritime radionavigation service or to the Federal radiolocation service.

The use of the band 5460-5650 MHz by the maritime radionavigation service is limited to shipborne radars.

Federal stations in the radiolocation service operating in the band 5470-5650 MHz, with the exception of ground-based radars used for meteorological purposes operating in the band 5600-5650 MHz, shall not cause harmful interference to, nor claim protection from, Federal stations in the maritime radionavigation service.

Frequency (MHz): 5570-5600

Allocated Use: Maritime Radionavigation, Radiolocation and RF Part 15 Devices

Remarks: In the band 5470-5650 MHz, the radiolocation service may be authorized for non-Federal use on the condition that harmful interference is not caused to the maritime radionavigation service or to the Federal radiolocation service.

The use of the band 5460-5650 MHz by the maritime radionavigation service is limited to shipborne radars.

Frequency (MHz): 5600-5650

Allocated Use: Maritime Radionavigation, Meteorological Aids, Radiolocation and RF Part 15 Devices

The use of the band 5460-5650 MHz by the maritime radionavigation service is limited to shipborne radars.

Between 5600 MHz and 5650 MHz, ground-based radars used for meteorological purposes are authorized to operate on a basis of equality with stations of the maritime radionavigation service.

Federal stations in the radiolocation service operating in the band 5470-5650 MHz, with the exception of ground-based radars used for meteorological purposes operating in the band 5600-5650

MHz, shall not cause harmful interference to, nor claim protection from, Federal stations in the maritime radionavigation service.

Frequency (MHz): 5650-5925

Allocated Use: Radiolocation, Amateur, RF Part 15 Devices and ISM Equipment

Remarks: In the bands 216-217 MHz, 220-225 MHz, 420-450 MHz (except as provided by US217 and G129), 890-902 MHz, 928-942 MHz, 1300-1390 MHz, 2310-2390 MHz, 2417-2450 MHz, 2700-2900 MHz, 5650-5925 MHz, and 9000-9200 MHz, the Federal radiolocation service is limited to the military services.

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 following bands:

13 553-13 567 kHz (centre frequency 13 560 kHz),

26 957-27 283 kHz (centre frequency 27 120 kHz),

40.66-40.70 MHz (centre frequency 40.68 MHz),

902-928 MHz in Region 2 (centre frequency 915 MHz),

2 400-2 500 MHz (centre frequency 2 450 MHz),

5 725-5 875 MHz (centre frequency 5 800 MHz), and

24-24.25 GHz (centre frequency 24.125 GHz) are also designated for industrial, scientific and medical (ISM) applications. Radio communication services operating within these bands must accept harmful interference which may be caused by these applications. ISM equipment operating in these bands is subject to the provisions of No. 15.13.

In the bands 435-438 MHz, 1260-1270 MHz, 2400-2450 MHz, 3400-3410 MHz (in Regions 2 and 3 only) and 5650-5670 MHz, the amateur-satellite service may operate subject to not causing harmful interference to other services operating in accordance with the Table (see No. 5.43). Administrations authorizing such use shall ensure that any harmful interference caused by emissions from a station in the amateur-satellite service is immediately eliminated in accordance with the provisions of No. 25.11. The use of the bands 1260-1270 MHz and 5650-5670 MHz by the amateur-satellite service is limited to the Earth-to-space direction.