Goto Section: 90.101 | 90.111 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 90.103 Radiolocation Service.
(a) Eligibility. The following persons are eligible for authorizations
in- the Radiolocation Service to operate stations to determine
distance, direction, speed, or position by means of radiolocation
devices, for purposes other than navigation:
(1) Any person engaged in a commercial, industrial, scientific,
educational, or local government activity
(2) A corporation or association that will furnish radiolocation
service to other persons.
(3) A corporation that will furnish a nonprofit radio communication
service to its parent corporation, to another subsidiary of the same
parent, or to its own subsidiary where the party to be served is
regularly engaged in any of the eligibility activities set forth in
(b) Frequencies available. The following table indicates frequencies
available for assignment to stations in the Radiolocation Service,
together with the class of station(s) to which they are normally
assigned, and the specific assignment limitations, which are explained
in paragraph (c) of this section:
Radiolocation Service Frequency Table
Frequency or band Class of station(s) Limitation
70 to 90 Radiolocation land or mobile 1
90 to 110 Radiolocation land 2
110 to 130 Radiolocation land or mobile 1
1705 to 1715 ......do 4, 5, 6
1715 to 1750 ......do 5, 6
1750 to 1800 do 5, 6
3230 to 3400 ......do 6, 8
4438 to 4488 Radiolocation land 3
5250 to 5275 ......do 3
13.45 to 13.55 ......do 3
16.10 to 16.20 ......do 3
24.45 to 24.65 ......do 3
26.20 to 26.42 ......do 3
41.015 to 41.665 ......do 3
43.35 to 44.00 ......do 3
420 to 450 Radiolocation land or mobile 21
2450 to 2500 ......do 9, 22, 23
2900 to 3100 ......do 10, 11
3100 to 3300 ......do 12
3550 to 3650 ......do 30
5250 to 5350 ......do 12
5350 to 5460 ......do 10, 14
5460 to 5470 ......do 10, 15
5470 to 5600 ......do 10, 11
5600 to 5650 ......do 10, 16
8500 to 9000 ......do 12, 17
9000 to 9200 ......do 10, 14
9200 to 9300 ......do 12
9300 to 9500 ......do 10, 15, 18
9500 to 10,000 ......do 12
10,000 to 10,500 ......do 12, 13, 19
10,500 to 10,550 ......do 20, 22, 24
13,400 to 13,750 ......do 12
13,750 to 14,000 ......do 29
15,700 to 17,300 ......do
24,050 to 24,250 ......do 12, 22, 24
33,400 to 36,000 ......do 12
(c) Explanation of assignment limitations appearing in the frequency
table of paragraph (b) of this section:
(1) This frequency band is shared with and stations operating in this
frequency band in this service are on a secondary basis to stations
licensed in the Maritime Mobile Service.
(2) This frequency band is shared with and stations operating in this
frequency band in this service are on a secondary basis to the LORAN
Navigation System; all operations are limited to radiolocation land
stations in accordance with footnote US104, § 2.106 of this chapter.
(3) Operations in this band are limited to oceanographic radars using
transmitters with a peak equivalent isotropically radiated power (EIRP)
not to exceed 25 dBW. Oceanographic radars shall not cause harmful
interference to, nor claim protection from interference caused by,
stations in the fixed or mobile services as specified in § 2.106,
footnotes 5.132A, 5.145A, and US132A. See Resolution 612 of the ITU
Radio Regulations for international coordination requirements and for
recommended spectrum sharing techniques.
(4) The non-Federal Government radiolocation service in this band is on
a secondary basis to stations in the aeronautical radionavigation
service operating on 1708 kHz.
(5) Station assignments on frequencies in this band will be made
subject to the conditions that the maximum output power shall not
exceed 375 watts and the maximum authorized bandwidth shall not exceed
(6) Because of the operation of stations having priority on the same or
adjacent frequencies in this or in other countries, frequency
assignments in this band may either be unavailable or may be subject to
certain technical or operational limitations. Therefore, applications
for frequency assignments in this band shall include information
concerning the transmitter output power, the type and directional
characteristics of the antenna and the minimum hours of operation
(8) Frequencies in this band may only be assigned to radiolocation
stations which are also assigned frequencies in the 1605-1800 kHz band,
provided the use of frequencies in this band is necessary for the
proper functioning of the particular radiolocation system. Operations
in this band are on a secondary basis to stations operating in
accordance with the Commission's table of frequency allocations
contained in § 2.106 of this chapter.
(9) This band is allocated to the Radiolocation Service on a secondary
basis to other fixed or mobile services and must accept any harmful
interference that may be experienced from such services or from the
industrial, scientific, and medical (ISM) equipment operating in
accordance with part 18 of this chapter. In the 2483.5-2500 MHz band,
no applications for new or modification to existing stations to
increase the number of transmitters will be accepted. Existing
licensees as of July 25, 1985, or on a subsequent date following as a
result of submitting an application for license on or before July 25,
1985, are grandfathered and their operation is co-primary with the
Radiodetermination Satellite Service.
(10) Speed measuring devices will not be authorized in this band.
(11) This frequency band is shared with and is on a secondary basis to
the Maritime Radionavigation Stations (part 80) and to the Government
(12) This frequency is shared with and is on a secondary basis to the
Government Radiolocation Service.
(13) Operations in this band are limited to survey operations using
transmitters with a peak power not to exceed 5 watts into the antenna.
(14) This frequency band is shared with and is on a secondary basis to
the Aeronautical Radionavigation Service (part 87) and to the
Government Radiolocation Service.
(15) The non-Government Radiolocation Service in this band is secondary
to the Maritime Radionavigation Stations (part 80), the Aeronautical
Radionavigation Service (part 87) and the Government Radiolocation
(16) This frequency band is shared with and is on a secondary basis to
the Maritime Radionavigation Stations (part 80) and the Government
Meteorological Aids Service.
(17) Operation in this frequency band is on a secondary basis to
airborne Doppler radars at 8800 MHz.
(18) Radiolocation installations will be coordinated with the
Government Meteorological Aids Service, and insofar as practicable,
will be adjusted to meet the needs of that service.
(19) Operations in this band are on a secondary basis to the Amateur
Radio Service (part 97). Pulsed emissions are prohibited.
(20) This band is restricted to radiolocation systems using type N0N
emission with a power not to exceed 40 watts into the antenna.
(21) Non-Government radiolocation stations in the band are secondary to
the Government Radiolocation Service, the Amateur Radio Service and the
Amateur-Satellite Service. Pulse-ranging radiolocation stations in this
band may be authorized along the shorelines of Alaska and the
contiguous 48 states. Radiolocation stations using spread spectrum
techniques may be authorized in the band 420-435 MHz for operation
within the contiguous 48 states and Alaska. Also, stations using spread
spectrum techniques shall be limited to a maximum output power of 50
watts, shall be subject to the applicable technical standards in
§ 90.209 until such time as more definitive standards are adopted by the
Commission and shall identify in accordance with § 90.425(c)(2).
Authorizations will be granted on a case-by-case basis; however,
operations proposed to be located within the zones set forth in
footnote US269, § 2.106 of this chapter should not expect to be
(22) For frequencies 2455 MHz, 10,525 MHz, and 24,125 MHz, only
unmodulated, continuous wave (NON) emission shall be employed. The
frequency 24.10 GHz, and frequencies in the 24.20-24.25 GHz band may
use NON emission along with an ancillary FM digital emission. The
frequency 24.10 GHz will be used for the purpose of alerting motorists
of hazardous driving conditions and the presence of emergency vehicles.
Equipment operating on 24.10 GHz must keep the deviation of the FM
digital signal within Â±5 MHz. Equipment operating on this frequency
must have a frequency stability of at least 2000 ppm and is exempt from
the requirements of § § 90.403(c), 90.403(f), and 90.429 of this part.
(23) Devices designed to operate as field disturbance sensors on
frequencies between 2450 and 2500 MHz with a field strength equal to or
less than 50,000 microvolts per meter at 30 meters, on a fundamental
frequency, will not be licensed or certificated for use under this
part. Such equipment must comply with the requirements for field
disturbance sensors as set forth in part 15 of this chapter.
(24) Devices designed to operate as field disturbance sensors on
frequencies between 10,500 and 10,550 MHz and between 24,050 and 24,250
MHz, with field strength equal to or less than 250,000 microvolts per
meter at 30 meters, on the fundamental frequency, will not be licensed
or certificated for use under this part. Such equipment must comply
with the requirements for field disturbance sensors as set forth in
part 15 of this chapter.
(29) This frequency band is shared with and is on secondary basis to
the Fixed-Satellite Service and to the Government's Radiolocation,
Space Research and Earth Exploration-Satellite Services. After January
1, 2000, the Government's Space Research and Earth
Exploration-Satellite Services shall operate on a co-equal secondary
basis with the non-Government Radiolocation Service, except that
grandfathered space stations in the Tracking and Data Relay Satellite
System shall continue to be protected from harmful interference.
(30) This frequency band is shared with and is on a secondary basis to
the Government Radiolocation Service, the Fixed Satellite Service (part
25), and the Citizens Broadband Radio Service (part 96). No new
licenses for Non-Federal Radiolocation Services in this band will be
issued after July 23, 2015.
(d) Other additional frequencies available. Radiolocation stations in
this service may be authorized, on request, to use frequencies
allocated exclusively to Federal Government stations, in those
instances where the Commission finds, after consultation with the
appropriate Government agency or agencies, that such assignment is
necessary or required for coordination with Government activities.
[ 43 FR 54791 , Nov. 22, 1978]
Editorial Note: For Federal Register citations affecting § 90.103, see
the List of CFR Sections Affected, which appears in the Finding Aids
section of the printed volume and at www.govinfo.gov.
Subpart Gâ€”Applications and Authorizations
Goto Section: 90.101 | 90.111
Goto Year: 2020 |
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