Spectrum Use Summary (137 - 328.6 MHz)
Compiled as of August 11, 1994
This document represents an overview of Federal and nonfederal
spectrum use. In order to serve its purpose as a quick reference, its
length has been limited. Therefore, it is not all inclusive in its
portrayal of U.S. spectrum requirements or its representation of the
allocation table.
Uses are stated in terms of general functions and actual equipment
names are not specified. Federal systems and missions which would have
necessitated classification of the summary have been omitted, though
they represent significant Federal requirements. Also, Federal agencies
lease many services from private sector providers. As written, this
summary indicates these uses only as nongovernment use of the frequency
spectrum. Furthermore, no attempt has been made to evaluate the level
of investment of funds in the uses that are discussed.
Allocations, by footnote, to very limited locations have generally
been omitted.
The summaries of Federal uses have been written to emphasize, to the
greatest extent possible, the missions performed, as opposed to the
agencies that perform them.
- 137-138 MHz
- Non-Government Allocation and Use
- METEOROLOGICAL- SATELLITE (Space-to-Earth)
- SPACE OPERATION (Space-to-Earth)
- SPACE RESEARCH (Space-to-Earth)
- MOBILE-SATELLITE (Space-to-Earth) 137-137.025 and 137.175-137.825
- Mobile Satellite (Space-to-Earth) 137.025-137.175 and 137.825-138
- The FCC has recently allocated this band for operations using
nongeostationary nonvoice mobile satellite systems (Little
LEOS).
- Government Allocation and Use
- METEOROLOGICAL- SATELLITE (Space-to-Earth)
- SPACE OPERATION (Space-to-Earth)
- SPACE RESEARCH (Space-to-Earth)
- MOBILE-SATELLITE (Space-to-Earth) 137-137.025 and 137.175-137.825
- Mobile Satellite (Space-to-Earth) 137.025-137.175 and 137.825-138
- Worldwide use of polar orbiting satellites for transmission of
weather pictures occurs in this band via the TIROS system. The
satellite also transmits tracking and telemetry information.
- NASA conducts satellite operations for the Advanced Technology
Satellite (ATS) and High Energy Transient Experiment (HETE).
- Government use of the mobile-satellite service is limited by US319
to earth stations operating with nongovernment satellites.
- 138-144 MHz
- Non-Government Allocation and Use
- Government Allocation and Use
- FIXED
- MOBILE
- This band is primarily used for non-tactical military land mobile
communications. However, tactical air-ground communications have been
growing rapidly. Also, this band is essential to the activities of the
Air Force Auxiliary (Civil Air Patrol) and Coast Guard Auxiliary for
support of search and rescue operations.
- 144-148 MHz
- Non-Government Allocation and Use
- AMATEUR
- AMATEUR-SATELLITE (144-146)
- Weak signal modes (144-144.3), Repeaters and other modes (144.3-147.99)
- Active use by amateur satellites worldwide
(145.8-146)
- Government Allocation and Use
- 148-149.9 MHz
- Non-Government Allocation and Use
- MOBILE-SATELLITE (Earth-to-space)
- The FCC has recently allocated this band for operations using
nongeostationary nonvoice mobile satellite systems (Little
LEOS).
- Government Allocation and Use
- FIXED
- MOBILE
- MOBILE-SATELLITE (Earth-to-space)
- This band is primarily used for non-tactical military land mobile
communications. However, tactical air-ground communications use has
been growing rapidly.
- A TIROS command link also operates in the band in accordance with
Footnote 608. NASA conducts satellite operations for the Advanced
Technology Satellite (ATS).
- Also, this band is essential to the activities of the Air Force
Auxiliary (Civil Air Patrol) and Coast Guard Auxiliary for support of
search and rescue operations.
- Government use of the mobile-satellite service is limited by US319
to earth stations operating with nongovernment satellites.
- 149.9-150.05 MHz
- Non-Government Allocation and Use
- RADIONAVIGATION SATELLITE
- MOBILE-SATELLITE (Earth-to-space)
- The FCC has recently allocated this band for operations using
nongeostationary nonvoice mobile satellite systems (Little LEOS).
Commercial shipping makes extensive use of TRANSIT-SAT signals for
radionavigation.
- Government Allocation and Use
- RADIONAVIGATION SATELLITE
- MOBILE-SATELLITE (Earth-to-space)
- TRANSIT-SAT (polar orbiting satellite) downlink transmissions in
this band support worldwide navigation.
- Government use of the mobile-satellite service is limited by US319
to earth stations operating with nongovernment satellites.
- 150.05-150.8 MHz
- Non-Government Allocation and Use
- Government Allocation and Use
- FIXED
- MOBILE
- This band is used for military non-tactical land mobile and fixed
communications. However, tactical air-ground communications have been
growing rapidly.
- 150.8-156.2475 MHz
- Non-Government Allocation and Use
- LAND MOBILE
- Land transportation (150.8-150.98, 152.255-152.465), Public safety
(150.98-151.4825, 154.6375-156.2475), Industrial (151.4825-151.4975,
152.465-152.495, 152.855-153.7325, 154.4825-154.6375), Industrial and
Public safety (151.4975-152, 153.7325-154.4825), Domestic public
(152-152.255, 152.495-152.855), Earth telecommand (154.2)
- Government Allocation and Use
-
-
- 156.2475-157.0375 MHz
- Non-Government Allocation and Use
- MARITIME MOBILE
- In accordance with international agreements, this band is used
worldwide for maritime communications.
- Government Allocation and Use
-
-
- 157.0375-157.1875 MHz
- Non-Government Allocation and Use
-
- Government Allocation and Use
- MARITIME MOBILE
- This band is critical to national VHF distress system communications
associated with response to distress signals.
-
- 157.1875-157.45 MHz
- Non-Government Allocation and Use
- MARITIME MOBILE
- In accordance with international agreements, this band is used
worldwide for maritime communications.
-
- Government Allocation and Use
-
- 157.45-161.575 MHz
- Non-Government Allocation and Use
- LAND MOBILE
- Land transportation (157.45-157.725, 159.48-161.575), Public safety
(158.715-159.48), Industrial (157.725-157.755, 158.115-158.475),
Domestic public (157.755-158.115)
-
- Government Allocation and Use
-
- 161.575-161.625 MHz
- Non-Government Allocation and Use
- MARITIME MOBILE
- In accordance with international agreements, this band is used
worldwide for maritime communications.
-
- Government Allocation and Use
-
- 161.625-161.775 MHz
- Non-Government Allocation and Use
- LAND MOBILE
- Remote pickup broadcast
-
- Government Allocation and Use
-
- 161.775-162.0125 MHz
- Non-Government Allocation and Use
- MARITIME MOBILE
- In accordance with international agreements, this band is used
worldwide for maritime communications.
-
- Government Allocation and Use
-
- 162.0125-174 MHz
- Non-Government Allocation and Use
- FIXED (173.2-173.4)
-
- Land Mobile (173.2-173.4)
-
- Fixed (FN US13 hydrological and meteorological data - designated
frequencies)
- Industrial, Public safety, Police radio for stolen vehicle recovery
systems (173.075).
- Government Allocation and Use
- FIXED (162.0125-173.2 and 173.4-174)
-
- MOBILE (162.0125-173.2 and 173.4-174)
- This band supports many Federal non-tactical fixed and land mobile
uses. These uses are critical to Departments of Agriculture and
Interior fire fighting, FAA windshear reporting, NOAA weather radio,
Department of Interior land and resource management, including flash
flood warning, and law enforcement activities throughout the Federal
Government. Law enforcement applications include land-based and
maritime operations. Use of this band will be shifted to narrowband
technologies in 1995.
-
- 174-216 MHz
- Non-Government Allocation and Use
- BROADCASTING
- This band is used for VHF TV channels 7-13. Also, wireless
microphones and auxiliary broadcasting systems operate on a secondary
basis.
-
- Government Allocation and Use
-
- 216-220 MHz
- Non-Government Allocation and Use
- MARITIME MOBILE
-
- Fixed
-
- Land Mobile
-
- Aeronautical Mobile
- This band is used on inland waterways by Automated Maritime
Telecommunications Systems. The FCC has recently set aside the 218-219
portion of this band for the interactive video data service (IVDS).
- Government Allocation and Use
- MARITIME MOBILE
-
- Radiolocation
-
- Fixed
-
- Aeronautical Mobile
- Though allocated secondary, there continue to be critical Federal
radiolocation requirements in this band. The U.S. Navy operates the
SPASUR system in the band 216.88-217.08 MHz at several locations in the
southern U.S. for the purpose of detecting Earth orbiting satellites.
Assignments to the fixed and mobile service may be made on condition of
no harmful interference to the SPASUR system (US229).
-
- 220-222 MHz
- Non-Government Allocation and Use
- LAND MOBILE
- Various trunked and conventional data users operate mobile systems.
The band is broken into 200 5 kHz channel pairs.
- Government Allocation and Use
- LAND MOBILE
-
- Radiolocation
- This band has recently been allocated to land mobile. It will be
shared by the Federal Government and private sector for narrowband
technologies. Though allocated secondary, there continue to be critical
Federal radiolocation requirements in this band.
-
- 222-225 MHz
- Non-Government Allocation and Use
- AMATEUR
- Weak signal modes (222-222.15), repeaters, packet radio and other modes (222.15-225)
- Government Allocation and Use
- Radiolocation
- Though allocated secondary, there continue to be critical Federal
radiolocation requirements in this band.
-
- 225-328.6 and 335.4-399.9 MHz
- Non-Government
Allocation and Use
-
- Government Allocation and Use
- FIXED (FN G27 military only)
-
- MOBILE (FN G27 military only)
-
- MOBILE-SATELLITE (FN G100 235-322 and 335-399.9, military only)
- These bands are heavily used throughout the U.S. for critical
military air traffic control and tactical training communications.
Specific functions of tactical training include air-ground-air
communications for combat weapons training carried out at and in the
vicinity of all major air bases and military training areas in the U.S.
-
- Tactical and strategic military satellite communications, essential
to linking the activities of ground, air, surface, and subsurface mobile
platforms, are conducted in this band under G100.
-
- Also, rocket test and test data telemetry operations are performed
in this band.
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