§  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 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
   1900 to 1950      ......do                     6, 25, 26, 27 and 28
   1950 to 2000      ......do                         6, 25, 27 and 28
   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                                       29
   15,700 to 17,300  ......do
   24,050 to 24,250  ......do                               12, 22, 24
   33,400 to 36,000  ......do                                       12
   78,000-81,000     .....do                                        30

   (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) [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 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
   (GMT).

   (7) [Reserved]

   (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
   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
   §  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
   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 § §  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.

   (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 §  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.

   (30) Use is limited to foreign object debris detection in airport air
   operations areas (see section 87.5 of this chapter). The radar must be
   mounted and utilized so when in use it does not, within the main
   beamwidth of the antenna (azimuth or elevation), illuminate a public
   roadway near the airport.

   (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.fdsys.gov .

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Subpart G--Applications and Authorizations

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