Radiosonde station. A station in the meteorological aids service employing a radiosonde.

Radio waves (or Hertzian waves). Electromagnetic waves of frequencies lower than 3000 GHz propagated in space without artificial guide.

Remote pickup broadcast base station. A base station licensed for communicating with remote pickup broadcast mobile stations.

Remote pickup broadcast mobile station. A land mobile station licensed for the transmission of program material and related communications from the scene of events which occur outside a studio to broadcasting station, and for communicating with other remote pickup broadcast base and mobile stations.

Safety service. A radiocommunication service used permanently or temporarily for the safeguarding of human life and property.

Ship station. A mobile station in the maritime mobile service located on board a vessel, other than a survival craft, which is not permanently moored.

Simplex operation. Operating method in which transmission is made possible alternately in each direction, for example, by means of manual control.

Spacecraft. Any type of space vehicle including an earth satellite or a deepspace probe, whether manned or unmanned.

Space research earth station. An earth station in the space research service.

Space research service. A space service in which spacecraft or other objects in space are used for scientific or technological research purposes.

Space research space station. A space station in the space research service.

Space service. A radiocommunication service:

-between earth stations and space stations,

-or between space stations,

or between earth stations when the signals are re-transmitted by space stations, or transmitted by reflection from objects in space, excluding reflection or scattering by the ionosphere or within the earth's atmosphere.

Space station. A station in the space service located on an object which is be

yond, is intended to go beyond, or has been beyond, the major portion of the earth's atmosphere.

Space telecommand. The use of radiocommunication for the transmission of signals to a space station to initiate, modify or terminate functions of the equipment on a space object, including the space station.

Space telemetering. The use of telemetering for the transmission from a space station of results of measurements made in a spacecraft, including those relating to the functioning of the spacecraft.

Space tracking. Determination of the orbit, velocity or instantaneous position of an object in space by means of radio determination, excluding primary radar, for the purpose of following the movement of the object.

Standard broadcasting station. A broadcasting station operated on a frequency in the band 535-1605 kHz.

Standard frequency service. A radiocommunication service for scientific technical and other purposes, providing the transmission of specified frequencies of stated high precision, intended for general reception.

Stationary satellite. A satellite, the circular orbit of which lies in the plane of the earth's equator and which turns about the polar axis of the earth in the same direction and with the same period as those of the earth's rotation.

Survival craft station. A mobile station in the maritime or aeronautical mobile service intended solely for survival purposes and located on any lifeboat, liferaft, or other survival equipment.

Telecommunication.

Any transmission, emission or reception of signs, signals, writing, images, and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic systems.

Telegraphy. A system of telecommunication which is concerned in any process providing transmission and reproduction at a distance of documentary matter, such as written or printed matter or fixed images, or the reproduction at a distance of any kind of information in such form. The foregoing definition appears in the International Telecommunication Convention, but, for the purposes of the Commission's rules, telegraphy shall mean, unless otherwise specified, "A system of telecommunica

tion for the transmission of written matter by the use of a signal code."

Telemetering. The use of telecommunication for automatically indicating or recording measurements at a distance from the measuring instrument.

Telemetering fixed station. A fixed station, the emissions of which are used for telemetering.

Telemetering land station. A land station, the emissions of which are used for telemetering.

Telemetering mobile station. A mobile station, the emissions of which are used for telemetering.

Telephony. A system of telecommunication set up for the transmission of speech or, in some cases, other sounds.

Television. A system of telecommunication for transmission of transient images of fixed or moving objects.

A

Television broadcasting station. broadcasting station utilizing both television and telephony to provide combination and simultaneous visual and aural programs intended to be received directly by the general public.

Television inter-city relay station. A fixed station used for intercity transmission of television program material and related communications for use by television broadcast stations.

Television pickup station. A land mobile station used for the transmission of television program material and related communications from the scenes of events occurring at points removed from television broadcast station studios to television broadcast stations.

Television STL station (studio-transmitter link). A fixed station used for the transmission of television program material and related communications from a studio to the transmitter of a television broadcast station.

Terrestrial service. Any radio service defined in this Part, other than a space service or the radio astronomy service. Terrestrial station. A station in a terrestrial service.

Tropospheric scatter. The propagation of radio waves by scattering as a result of irregularities or discontinuities in the physical properties of the troposphere.

Zone station. A fixed station in the public safety (police) radio service using radiotelegraph (A1 emission) for com

munication with other similar stations in the same zone and with an interzone station.

(Sec. 308, 48 Stat., as amended, 1084; 47 U.S.C. 308) [28 F.R. 12465, Nov. 22, 1963, as amended at 30 F.R. 7155, May 28, 1965; 30 F.R. 8679, July 9, 1965; 30 F.R. 8839, July 14, 1965; 30 F.R. 13370, Oct. 21, 1965; 31 F.R. 14395, Nov. 9, 1966; 33 F.R. 10856, July 31, 1968; 34 F.R. 5379, Mar. 19, 1969; 34 F.R. 5656, Mar. 26, 1969; 35 F.R. 5615, Apr. 7, 1970] Subpart B-Allocation, Assignment, and Use of Radio Frequencies

§ 2.100 International force.

regulations in

The Radio Regulations (Geneva, 1959), which became effective internationally on May 1, 1961, were incorporated to the extent practicable in Subparts A and B of this part and became effective nationally on December 1, 1961. The Radio Regulations were subsequently revised, in part, by the Extraordinary Administrative Radio Conference (Geneva, 1963) which specified January 1, 1965 as the effective date of the revision. The partial revision has also been incorporated to the extent practicable in Subparts A and B of this part and is applicable nationally, effective July 1, 1965.

[30 F.R. 7156, May 28, 1965] § 2.101

Nomenclature of frequencies.

of energy by radio, shall be in accordance with the Table of Frequency Allocations in § 2.106.

(b) On the condition that harmful interference will not be caused to services operating in accordance with the Table of Frequency Allocations the following exceptions to paragraph (a) of this section may be authorized:

(1) In individual cases the Commission may, without rule-making proceedings, authorize on a temporary basis only, the use of frequencies not in accordance with the Table of Frequency Allocations for projects of short duration or emergencies where the Commission finds that important or exceptional circumstances require such utilization: Provided, That such authorizations are not intended to develop a service to be operated on frequencies other than those allocated such service.

(2) A station for the development of techniques or equipment to be employed by services or classes of stations set forth in columns 8 and 9 of the Table of Frequency Allocations may be authorized the use of frequencies allocated to those services or classes of stations.

(3) Experimental stations engaged solely in scientific or technical radio experiments not related to an existing or proposed service nor intended to develop a proposed service or specific use of radio may be authorized the use of any frequency which is in a band allocated to the fixed, land mobile or broadcasting services or to one of these services shared with another service.

(4) Experimental stations engaged in communications essential to research projects when existing communication facilities are inadequate may be authorized the use of any frequency which is in a band allocated to the fixed, land mobile or broadcasting services or to one of those services shared with another service.

(5) Experimental stations engaged solely in ionospheric sounding by means of the technique of sweeping a band of frequencies may be authorized the use of any band or bands or frequencies not allocated, on an exclusive or shared basis, to the radio astronomy service.

(6) Experimental stations to be operated pursuant to a contractual agreement with the United States Government

and intended for the sole and express purpose of developing equipment or a technique to be employed by stations belonging to and operated by the United States may be authorized the use of any frequency which is not in a band allocated, on an exclusive or shared basis, to the radio astronomy service.

(7) Experimental stations intended for the sole and express purpose of developing equipment or a technique to be employed by stations under the jurisdiction of a foreign government may be authorized the use of any frequency which is not in a band allocated to the amateur service or the radio astronomy service.

(8) In the event a band is reallocated so as to delete its availability for use by a particular service, the Commission may provide for the further interim use of the band by stations in that service for a temporary, specific period of time.

(c) The use of frequencies in the bands above 25 MHz allocated exclusively to Government stations and the use of frequencies below 25 MHz which may not be in accordance with § 2.106 may be authorized to non-Government stations in those instances where the Commission finds, after consultations with the appropriate Government agency or agencies, that such assignment is necessary for intercommunication with Government stations or where such use by nonGovernment stations is required for coordination with Government activities.

(d) Aircraft stations may communicate with stations of the maritime mobile service. They shall then conform to those provisions of the Radio Regulations which relate to the maritime mobile service. For this purpose aircraft stations should use the frequencies allocated to the maritime mobile service. However, having regard to interference which may be caused by aircraft stations at high altitudes, maritime mobile frequencies in the bands above 30 MHz shall not be used by aircraft stations in any specific area without the prior agreement of all administrations of the area in which interference is likely to be caused. In particular, aircraft stations operating in Region 1 should not use frequencies in the bands above 30 MHz allocated to the maritime mobile service by virtue of any agreement between administrations in that region.

(e) Non-Government services operating on frequencies in the band 25-50 MHz must recognize that it is shared with various services of other countries; that harmful interference may be caused by skywave signals received from distant stations of all services of the United States and other countries radiating power on frequencies in this band; and that no protection from such harmful interference generally can be expected. Persons desiring to avoid such harmful interference should consider operation on available frequencies higher in the radio spectrum not generally subject to this type of difficulty.

(f) The stations of a service shall use frequencies so separated from the limits of a band allocated to that service as not to cause harmful interference to the service to which the frequency bands immediately adjoining are allocated.

(g) In the bands above 25 MHz which are allocated to the non-Government land mobile service, fixed stations may be authorized on the following conditions:

(1) That such stations are authorized in the service shown in Column 11 of the Table of Frequency Allocations in the band in question;

(2) That harmful interference will not be caused to services operating in accordance with the Table of Frequency Allocations.

[28 F.R. 12465, Nov. 22, 1963, as amended at 30 F.R. 7156, May 28, 1965; 34 F.R. 12138, July 19, 1969; 35 F.R. 5616, Apr. 7, 1970] § 2.103 Government use of non-Government frequencies.

(a) Government stations may be authorized to use non-Government frequencies in the bands above 25 MHz if the Commission finds that such use is necessary for coordination of Government and non-Government activities: Provided, however, That:

(1) Government operation on nonGovernment frequencies shall conform with the conditions agreed upon by the Commission and the Office of Emergency Preparedness (the more important of which are contained in subparagraphs (2), (3), and (4) of this paragraph), a complete list of which is available for public examination at each of the Commission's Field Engineering and Monitoring Bureau Field Offices:

(2) Such operations shall be in accordance with Commission rules governing the service to which the frequencies involved are allocated;

(3) Such operations shall not cause harmful interference to non-Government stations and, should harmful interference result, that the interfering Government operation shall immediately terminate; and

(4) Government operation has been certified as necessary by the non-Government licensees involved and this certification has been furnished, in writing, to the Government agency with which communication is required.

[28 F.R. 12465, Nov. 22, 1963, as amended at 35 F.R. 5616, Apr. 7, 1970]

§ 2.104 Radio astronomy station notification.

(a) Pursuant to No. 639AC, Article 9A and Section F of Appendix 1A to the international Radio Regulations (as revised, Geneva, 1963), operators of radio astronomy stations desiring international recognition of their use of specific radio astronomy frequencies or bands of frequencies for reception, should file the following information with the Commission for inclusion in the Master International Frequency Register:

(1) The center of the frequency band observed, in kilohertz up to 30,000 kHz inclusive, and in Megahertz above 30,000 kHz.

(2) Date of putting into use (actual or foreseen, as appropriate).

(3) Name and location of the station, including geographical co-ordinates in degrees and minutes.

(4) Width of frequency band observed by the station.

(5) Antenna type and dimensions, effective area and angular coverage in azimuth and elevation.

(6) Maximum hours of reception (G.M.T.) of the frequency band shown in subparagraph (1) of this paragraph. (7) Overall receiving system noise temperature (°K).

(8) Class of observations to be taken on the frequency band shown in subparagraph (1) of this paragraph. Class A observations are those in which the sensitivity of the equipment is not a primary factor. Class B observations are those of such a nature that they can be made only with advanced low-noise receivers using the best techniques.

(b) Observations being conducted on frequencies or frequency bands not allocated to the radio astronomy service should be reported as in paragraph (a) of this section for information purposes. Information in this category will not be

submitted for entry in the Master International Frequency Register and protection from interference will not be afforded such operations by stations in other services.

[30 F.R. 7156, May 28, 1965, as amended at 35 F.R. 5616, Apr. 7, 1970]

§ 2.105 Application and format of the Table of Frequency Allocations.

(a) In the Table of Frequency Allocations below 25 MHz, the authority extended to stations in the fixed service, unless otherwise specified, extends only to those stations in the following categories of service:

(1) Aeronautical fixed.

(2) Fixed (in U.S. possessions and Alaska).

(3) International fixed public.

(b) In the Table of Frequency Allocations between 5000 and 25,000 kHz, the authority extended to stations in the mobile service, unless otherwise specified, extends only to those stations in the following categories of service:

(1) Aeronautical mobile.
(2) Maritime mobile.

(c) Columns 1, 2, 3, and 4 of the Table of Frequency Allocations indicate the allocation applicable on a worldwide basis or in Region 2 in accordance with the Geneva Radio Regulations.

(d) In Column 6 (above 25 MHz) the letter G means Federal Government radio stations, i.e., those belonging to and operated by the United States. The symbol NG means other than Federal Government radio stations, i.e., those whose frequencies are assigned by the Commission.

(e) Column 10 lists certain frequencies which have national or international significance and are used for specific standardized purposes. These frequencies may be made available for assignment to stations which conform to the nature of service or station listed in Column 11 opposite the assignable frequency. The assignment and use of the frequencies listed in Column 10 is limited to those stations which, by definition, are included in the services and classes of stations (Column 8 or 9) to which the frequency band (Column 7) is allocated.

(f) In Column 11 "SERVICES" are in large block print and "stations” in small print.

(g) Where, in Columns 2, 4, and 8, a band is indicated as allocated to more than one service, such services are listed in the following order:

(1) Services, the names of which are printed in all capital letters (example: FIXED); these services are called "primary" services;

(2) Services, the names of which are italicized and are printed with the first letter capitalized and all others small type (example: Radionavigation); these services are called "permitted" services;

(3) Services, the names of which are printed as in subparagraph (2) of this paragraph, but not italicized (example: Mobile); these are called "secondary" services, which are on a noninterference basis to the primary and permitted services.

NOTE 1. Geneva Radio Regulation No. 138: Permitted and primary services have equal rights, except that, in the preparation of frequency plans, the primary service, as compared with the permitted service, shall have prior choice of frequencies.

NOTE 2. Geneva Radio Regulation No. 139: Stations of a secondary service: (a) Shall not cause harmful interference to stations of primary or permitted services to which frequencies are already assigned or to which frequencies may be assigned at a later date; (b) cannot claim protection from harmful interference from stations of a primary or permitted service to which frequencies are already assigned or may be assigned at a later date; (c) can claim protection, however, from harmful interference from stations of the same or other secondary service(s) to which frequencies may be assigned at a later date.

(h) The following symbols are used to designate footnotes in the Table of Frequency Allocations.

(1) Any footnote consisting of three digits or three digits and a one or two letter suffix, e.g., (170) or (215A), denotes a paragraph in the Geneva (1959) Radio Regulations as amended by the Space Conference (Geneva, 1963). Where such a footnote is applicable, without modification, to the national Table of Frequency Allocations, the symbol appears in the national table as well as in Column 1, 2, 3 or 4.

(2) Any footnote consisting of the letters US followed by one or more digits, e.g., US1, denotes a stipulation the application of which is a matter of agreement between the Commission and other appropriate Government agencies.

(3) Any footnote consisting of the letters NG followed by one or more digits, e.g., NG1, is a stipulation applicable to non-Government stations.

[28 F.R. 12466, Nov. 22, 1963, as amended at 30 F.R. 7156, May 28, 1965; 35 F.R. 5616, Apr. 7, 1970]