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Allocations

Intro to Allocations

U.S. Non-Federal-Government Allocations

148 - 149.9 MHz
MOBILE-SATELLITE (Earth-to-space) US320 US323 US325

5.218 5.219 US319

FCC Rule Parts:
Satellite Communications (25)

U.S. Federal Government Allocations

148 - 149.9 MHz
FIXED
MOBILE
MOBILE-SATELLITE (Earth-to-space) US319 US320 US323 US325

5.218 5.219 G30

ITU Region 1 Allocations

148 - 149.9 MHz
FIXED
MOBILE except aeronautical mobile (R)
MOBILE-SATELLITE (Earth-to-space) 5.209

5.218 5.219 5.221

ITU Region 2 Allocations

148 - 149.9 MHz
FIXED
MOBILE
MOBILE-SATELLITE (Earth-to-space) 5.209

5.218 5.219 5.221

ITU Region 3 Allocations

148 - 149.9 MHz
FIXED
MOBILE
MOBILE-SATELLITE (Earth-to-space) 5.209

5.218 5.219 5.221

SpectrumWiki

Amateur Radio 2 m Band

Orbcomm LEO Satellite Constellation

Footnotes

5.209 The use of the bands 137-138 MHz, 148-150.05 MHz, 399.9-400.05 MHz, 400.15-401 MHz, 454-456 MHz and 459-460 MHz by the mobile-satellite service is limited to non-geostationary-satellite systems.

5.218 Additional allocation: the band 148-149.9 MHz is also allocated to the space operation service (Earth-to-space) on a primary basis, subject to agreement obtained under No. 9.21. The bandwidth of any individual transmission shall not exceed ± 25 kHz.

5.219 The use of the band 148-149.9 MHz by the mobile-satellite service is subject to coordination under No. 9.11A. The mobile-satellite service shall not constrain the development and use of the fixed, mobile and space operation services in the band 148-149.9 MHz.

5.221 Stations of the mobile-satellite service in the band 148-149.9 MHz shall not cause harmful interference to, or claim protection from, stations of the fixed or mobile services operating in accordance with the Table of Frequency Allocations in the following countries: Albania, Algeria, Germany, Saudi Arabia, Australia, Austria, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Benin, Bosnia and Herzegovina, Botswana, Brunei Darussalam, Bulgaria, Cameroon, China, Cyprus, Congo (Rep. of the), Korea (Rep. of), Côte d’Ivoire, Croatia, Cuba, Denmark, Egypt, the United Arab Emirates, Eritrea, Spain, Estonia, Ethiopia, the Russian Federation, Finland, France, Gabon, Ghana, Greece, Guinea, Guinea Bissau, Hungary, India, Iran (Islamic Republic of), Ireland, Iceland, Israel, Italy, the Libyan Arab Jamahiriya, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kuwait, The Former Yugoslav Republic of Macedonia, Lesotho, Latvia, Lebanon, Liechtenstein, Lithuania, Luxembourg, Malaysia, Mali, Malta, Mauritania, Moldova, Mongolia, Montenegro, Mozambique, Namibia, Norway, New Zealand, Oman, Uganda, Uzbekistan, Pakistan, Panama, Papua New Guinea, Paraguay, the Netherlands, the Philippines, Poland, Portugal, Qatar, the Syrian Arab Republic, Kyrgyzstan, Dem. People's Rep. of Korea, Slovakia, Romania, the United Kingdom, Senegal, Serbia, Sierra Leone, Singapore, Slovenia, Sri Lanka, South Africa, Sweden, Switzerland, Swaziland, Tanzania, Chad, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Ukraine, Viet Nam, Yemen, Zambia and Zimbabwe. (WRC-07)

US319 In the bands 137-138 MHz, 148-149.9 MHz, 149.9-150.05 MHz, 399.9-400.05 MHz, 400.15-401 MHz, 1610-1626.5 MHz, and 2483.5-2500 MHz, Federal stations in the mobile-satellite service shall be limited to earth stations operating with non-Federal space stations.

US320 The use of the bands 137-138 MHz, 148-150.05 MHz, 399.9-400.05 MHz, and 400.15-401 MHz by the mobile-satellite service is limited to non-voice, non-geostationary satellite systems and may include satellite links between land earth stations at fixed locations.

US323 In the band 148-149.9 MHz, no individual mobile earth station shall transmit on the same frequency being actively used by fixed and mobile stations and shall transmit no more than 1% of the time during any 15 minute period; except, individual mobile earth stations in this band that do not avoid frequencies actively being used by the fixed and mobile services shall not exceed a power density of −16 dBW/4 kHz and shall transmit no more than 0.25% of the time during any 15 minute period. Any single transmission from any individual mobile earth station operating in this band shall not exceed 450 ms in duration and consecutive transmissions from a single mobile earth station on the same frequency shall be separated by at least 15 seconds. Land earth stations in this band shall be subject to electromagnetic compatibility analysis and coordination with terrestrial fixed and mobile stations.

US325 In the band 148-149.9 MHz fixed and mobile stations shall not claim protection from land earth stations in the mobile-satellite service that have been previously coordinated; Federal fixed and mobile stations exceeding 27 dBW EIRP, or an emission bandwidth greater than 38 kHz, will be coordinated with existing mobile-satellite service space stations.

G30 In the bands 138-144 MHz, 148-149.9 MHz, and 150.05-150.8 MHz, the fixed and mobile services are limited primarily to operations by the military services.

SpectrumWiki

Amateur Radio 2 m Band

The band 144 - 146 MHz is allocated in all three ITU Regions for amateur radio use. In Regions 2 & 3, the additional segment 146 - 148 MHz is also allocated for amateur radio.

The band is heavily used for local repeater operations, but is also used for SSB and CW, weak signal communications such as meteor scatter and moonbounce, and amateur satellites (for example, the International Space Station has an amateur radio downlink that commonly operates at 145.8 MHz).

In the US and Canada, the major, but not only, use of this band is for mobile half duplex operations through repeaters, often from hand held "handitalkies"/HTs.

The official ARRL-approved bandplan is:

144.00-144.05 EME (CW)
144.05-144.10 General CW and weak signals
144.10-144.20 EME and weak-signal SSB
144.200 National calling frequency
144.200-144.275 General SSB operation
144.275-144.300 Propagation beacons
144.30-144.50 New OSCAR subband
144.50-144.60 Linear translator inputs
144.60-144.90 FM repeater inputs
144.90-145.10 Weak signal and FM simplex (145.01,03,05,07,09 are widely used for packet)
145.10-145.20 Linear translator outputs
145.20-145.50 FM repeater outputs
145.50-145.80 Miscellaneous and experimental modes
145.80-146.00 OSCAR subband
146.01-146.37 Repeater inputs
146.40-146.58 Simplex
146.52 National Simplex Calling Frequency
146.61-146.97 Repeater outputs
147.00-147.39 Repeater outputs
147.42-147.57 Simplex
147.60-147.99 Repeater inputs

On the 2 meter band, the input and output frequencies of the repeater are separated by a spacing of 600 kHz. Which can be either plus or minus the repeater output frequency.

Many repeaters use CTCSS (Continuous Tone Coded Squelch System) or PL tones on their inputs as indicated in repeater directories.

The usual modulation for repeater operation is FM with a peak deviation of 5 kHz.

The references include links to online and printed repeater directories.

Frequency Bands
Band	Use	Service	Table
144 - 146 MHz	Amateur radio 2 m band (all ITU Regions)	AM	N
146 - 148 MHz	Amateur radio 2 m band (ITU Regions 2 & 3 only)	AM	N

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Orbcomm LEO Satellite Constellation

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Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	148 MHz	148.95 MHz	149.9 MHz
Wavelength	2.0 m	2.0 m	2.0 m
Band designator(s)	VHF	VHF	VHF
Isotropic collecting area	3,265.2 cm²	3,223.7 cm²	3,182.9 cm²
Free space loss (1 m)	15.9 dB	15.9 dB	16.0 dB
Free space loss (1 km)	75.9 dB	75.9 dB	76.0 dB
Free space loss (10 km)	95.9 dB	95.9 dB	96.0 dB
Free space loss (100 km)	115.9 dB	115.9 dB	116.0 dB
Free space loss (1000 km)	135.9 dB	135.9 dB	136.0 dB
Free space loss (35,786 km = GEO orbit)	166.9 dB	167.0 dB	167.0 dB
Free space loss (378,370 km = Moon)	187.4 dB	187.5 dB	187.5 dB