[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.103]
[Page 312-315]
TITLE 47--TELECOMMUNICATION
CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED)
PART 90_PRIVATE LAND MOBILE RADIO SERVICES--Table of Contents
Subpart F_Radiolocation Service
Sec. 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 this
paragraph.
(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
------------------------------------------------------------------------
Kilohertz
------------------------------------------------------------------------
70 to 90............................ Radiolocation land or 1
mobile.
90 to 110........................... Radiolocation land.... 2
110 to 130.......................... Radiolocation land or 1
mobile.
1705 to 1715........................ ......do.............. 4, 5, 6
1715 to 1750........................ ......do.............. 5, 6
1750 to 1800........................ ......do.............. 5, 6, 7
1900 to 1950........................ ......do.............. 6, 25, 26,
27, and 30
1950 to 2000........................ ......do.............. 6, 25, 27,
and 30
3230 to 3400........................ ......do.............. 6, 8
Megahertz
------------------------------------------------------------------------
420 to 450........................ ......do.............. 21
2450 to 2500........................ ......do.............. 9, 22, 23
2900 to 3100........................ ......do.............. 10, 11
3100 to 3300........................ ......do.............. 12
3300 to 3500........................ ......do.............. 12, 13
3500 to 3650........................ ......do.............. 12
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.............. 31
15,700 to 17,700.................... ......do.............. 12
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:
[[Page 313]]
(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 International Fixed Service and 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
lands stations in accordance with footnote US104, Sec. 2.106 of this
chapter.
(3) [Reserved]
(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 2 kHz.
(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 of may be subject to
certain technical of 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 (GMT).
(7) This band is shared with the Disaster Communications Service
(part 99) and operations are on a secondary basis to that service
between local sunset and local sunrise, or at any time during an actual
or imminent disaster. Local sunrise and sunset times shall be derived
from the 1946 American Nautical Almanac. Each frequency assignment in
this band is on an exclusive basis within the daytime primary service
area to which assigned. The daytime primary service area is the area
where the signal intensities are adequate for radiolocation purposes
during the hours from sunrise to sunset from all stations in the
radiolocation system of which the station in question is a part; that
is, the primary service area of the station coincides with the primary
service area of the system. The normal minimum geographical separation
between stations of different licensees shall be at least 580 km. (360
mi.) when the stations are operated on the same frequency or on
different frequencies separated by less than 3 kHz. Where geographical
separation of less than 580 km. (360 mi.) is desired under these
circumstances it must be shown that the desired separation will result
in protection ratio of at least 20 decibels throughout the daytime
primary service area of other stations. Applications in this band are
placed on public notice in accordance with Sec. 1.962 of this chapter.
Where the number of applicants requesting authority to serve an area
exceeds the number of frequencies available for assignment; or where it
appears that fewer applicants or licensees than the number before it
should be given authority to serve a particular area; or where it
appears that an applicant, either directly or indirectly, seeks to use
more than 25 kHz of the available spectrum space in this band, the
applications may be designated for hearing.
(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 Sec. 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
[[Page 314]]
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
Radiolocation Service.
(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 Service.
(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 Sec.
90.209 until such time as more definitive standards are adopted by the
Commission and shall identify in accordance with Sec. 90.425(c)(3).
Authorizations will be granted on a case-by-case basis; however,
operations proposed to be located within the zones set forth in Sec.
90.177(e) should not expect to be accommodated.
(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 5 MHz. Equipment operating
on this frequency must have a frequency stability of at least 2000 ppm
and is exempt from the requirements of Sec. Sec. 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.
[[Page 315]]
(25) 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 1.0 kHz.
(26) Each frequency assignment in this band is on an exclusive basis
within the primary service area to which assigned. The primary service
area is the area where the signal intensities are adequate for
radiolocation purposes from all stations in the radiolocation system of
which the station in question is a part; that is, the primary service
area of the station coincides with the primary service area of the
system. The normal minimum geographical separation between stations of
different licensees shall be at least 1931 km (1200 miles) when the
stations are operated on the same frequency or on different frequencies
separated by less than 1.0 kHz. Where geographical separation of less
than 1931 km (1200 miles) is requested under these circumstances, it
must be shown that the desired separation will result in a protection
ratio of at least 20 decibels throughout the primary service area of
other stations.
(27) Notwithstanding the bandwidth limitations otherwise set forth
in this section of the rules, wideband systems desiring to operate in
this band may use such bandwidth as is necessary for proper operation of
the system provided that the field strength does not exceed 120
microvolts per meter per square root Hertz (120 uv/m/Hz\1/2\) at 1.6 km
(1 mile). Such wideband operations shall be authorized on a secondary
basis to stations operating within otherwise applicable technical
standards. Applications for wideband systems in this band will be
accepted beginning December 15, 1985.
(28) Until July 1, 1988, this band will be available only for
licensees of existing systems operating in the 1605-1705 kHz portion of
the 1605-1715 kHz band requesting modification of their authorizations
to change frequencies to this band and for licensees of wideband
systems. On July 1, 1988, requests for new station authorizations in
this band will be accepted and, if necessary, will be subject to the
random selection procedures outlined in Sec. 1.972 of the Commission's
Rules.
(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.
(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 Sec.
90.103, see the List of CFR Sections Affected, which appears in the
Finding Aids section of the printed volume and on GPO Access.