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Acronyms, Abbreviations, and Glossary Acronyms and Abbreviations—

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Acronyms, Abbreviations, and Glossary Acronyms and Abbreviations— AFNAVSAT — Air Force Navigation Satellite FLTSATCOM — Fleet Satellite Communication AM — amplitude modulation System (Naval) ARFA — Allied Radio Frequency FM — frequency modulation Agency (NATO) FMAC — Frequency Management AWACS — Airborne Warning and Advisory Committee to the Control System National Telecommunications BSS — broadcasting-satellite service and Information C-E — communications-electronics Administration (DOD parlance) FSS — fixed satellite service CCIR — International Radio FX — fixed service Consultative Committee of GHz — gigahertz (1 billion cycles per the International second) Telecommunication Union GPS — global positioning satellite CCIs — reference to both the CCIR (sometimes NAVSTAR/GPS) and CCITT (DOD) CCITT — International Telegraph and HF — high frequency (3 to 30 MHZ) Telephone Consultative Hz — hertz (one cycle per second) Committee of the IBI — International Bureau of International Informatics Telecommunication Union ICA — International CITEL — Inter-American Communications Agency Telecommunication ICAO — International Civil Conference of the Aeronautical Organization Organization of American IFL — International Frequency List States IFRB — International Frequency COMSAT — Communications Satellite Registration Board Corp. IMCO — Intergovernmental Maritime COPUOS — The United Nations Consultive Organization Committee on the Peaceful INMARSAT — International Maritime Uses of Outer Space Satellite Organization C 3 I — command, control, INTELSAT — International communications, and Telecommunications Satellite intelligence (DOD parlance) System DNS — The Department of Defense IRAC — Interdepartment Radio Navigation Satellite system Advisory Committee DOD — Department of Defense ITU — International DSCS — Defense Satellite Telecommunication Union Communication System kHz — kilohertz (1000 cycles per ECAC — Electromagnetic second) Compatibility Analysis LF — low frequency (30 to 300 kHz) Center (DOD), Annapolis, Md. LR — radiolocation service (fixed) EHF — extremely high frequency (30 MF — medium frequency (300 to to 300 GHz) 3000 kHz) EIRP — effective isotropically radiated MHz — megahertz (1 million cycles power (measured in watts) per second) EMC — electromagnetic compatibility MO — mobile service FAS — Frequency Assignment MR — radiolocation service (mobile) Subcommittee of the NASA — National Aeronautics and Interdepartment Radio Space Administration Advisory Committee NATO — North Atlantic Treaty FCC — Federal Communications Organization Commission NTIA — National Telecommunications 147 ——. 148 . Radio frequency Use and Management Impacts From the World Administrative Radio Conference of 1979 and Information UNESCO – United Nations Educational, Administration Scientific, and Cultural RARC — Regional Administrative Organization Radio Conference UPU – Universal Postal Union RL — radionavigation service (fixed) VHF — very high frequency (30 to RO — radionavigation service 300 MHz) (mobile) VLF — very low frequency (3 to 30 SHF — super high frequency (3 to 30 kHz) GHz) WARC – World Administrative Radio UHF — ultrahigh frequency (300 to Conference 3000 MHz) WIPO – World Intellectual Property U.N. — United Nations Organization UNDP — United Nations Development Program . Glossary A priori planning—procedure by which frequen- Assigned frequency–the center of the frequency cies and orbital locations are allotted to indi- band assigned to a station. vidual countries according to a plan negoti- Assigned frequency band–the frequency band ated by member-nations and implemented by within which the emission of a station is au- ITU, thorized; the width of the band equals the nec- Aeronautical mobile service-a mobile service be- essary bandwidth plus twice the absolute val- tween aeronautical stations and aircraft sta- ue of the frequency tolerance. Where space tions, or between aircraft stations, in which stations are concerned, the assigned fre- survival craft stations may participate; emer- quency band includes twice the maximum gency position-indicating radiobeacon sta- Doppler shift that may occur in relation to tions may also participate in this service on any point of the Earth’s surface. designated distress and emergency frequen- Assignment (of a radiofrequency or radiofre- cies. quency channel) —authorization given by an Aeronautical mobile-satellite service-a mobile- administration for a radio station to use a satellite service in which mobile Earth sta- radiofrequency or radiofrequency channel tions are located onboard aircraft; survival under specified conditions. craft stations and emergency position-indi- Band–in radio, frequencies that are within two cating radiobeacon stations may also par- definite limits and are allocated for a definite ticipate in this service. purpose or service, e.g., the standard AM Aeronautical radionavigation-satellite service-a broadcast band. radionavigation-satellite service in which Broadcasting-satellite service–a radio-communi- Earth stations are located onboard aircraft. cation service in which signals transmitted or Aeronautical radioavigation service—a radionav- retransmitted by space stations are intended igation service intended for the benefit and for direct reception by the general public. for the safe operation of aircraft. Broadcasting service–a radio-communication Allocation (of frequency band) –entry in the table service in which the transmissions are in- of frequency allocations of a given frequency tended for direct reception by the general band for the purpose of its use by one or more public. This service may include sound trans- terrestrial or space radiocommunication serv- missions, television transmissions, or other ices or the radio astronomy service under types of transmission. specified conditions. This term shall also be CCIR–International Radio Consultative Com- applied to the frequency band concerned. mittee, a permanent organ of ITU where Allotment (of a radio frequency or radio fre- member-nations and recognized private oper- quency channel) —entry of a designated fre- ating agents formulate recommendations quency channel in an agreed plan, adopted by concerning technical and operational radio a competent conference, for use by one or matters. more administrations for a terrestrial or CCITT–International Telegraph and Telephone space radiocommunciation service in one or Consultative Committee, a permanent organ more identified countries or geographical of ITU where member-nations and recognized areas and under specified conditions. private operating agents formulate recom- Amateur service-a radiocommunication service mendations concerning technical, opera- for the purpose of self-training, intercom- tional, and tariff aspects of telecommunica- munication, and technical investigations car- tion. ried out by amateurs, i.e., by duly authorized CCIR SPM–special preparatory meeting of persons interested in radio technique solely CCIR convened in 1978 by the Secretary Gen- with a personal aim and without pecuniary in- eral of ITU to provide technical support to terest. WARC-79. Analog transmission—a technique that trans- dBW–a measure of power, decibels referened to mits the signal in a continuous electrical 1 watt, waveform. The information context of the sig- Digital transmission— a technique that transits nal is conveyed by the value or magnitude of the signal in the form of one of a diswe some characteristics of the signal such as the number of codes. The information content amplitude, phase, or frequency of a voltage. the signal is concerned with discrete state 84-591 f) - 82 - 11 150 “ Radiofrequency Use and Management Impacts From the World Administrative Radio Conference of 1979 the signal, such as the presence or absence of for frequencies, in the usable portion of the a voltage, a contact in the open or closed posi- radio spectrum, to radio-communication serv- tion, or a hole or no hole in certain positions ices. on a card. Frequency allocation table (national)–a table in Earth exploration-satellite service–a radio-com- the FCC Rules and Regulations allocating munication service between Earth stations bands of frequencies, in the usable portion of and one or more space stations, which may in- the radio spectrum, to radio-communication clude links between space stations, in which: services. 1) information relating to the characteristics Geostationary satellite–a geosynchronous satel- of the Earth and its natural phenomena is ob- lite whose circular and direct orbit lies in the tained from active sensors or passive sensors plane of the Earth’s Equator and which thus on Earth satellites; 2) similar information is remains fixed relative to the Earth; by exten- collected from airborne or Earth-based plat- sion, a satellite that remains approximately forms; 3) such information maybe distributed fixed relative to the Earth. to Earth stations within the system con- Geostationary satellite orbit–the oribit in which cerned; and 4) platform interrogation may be a satellite must be placed to be a geostation- included. This service may also include feeder ary satellite. links necessary for its operation. Geosynchronous satellite–an Earth satellite Emission–radiation produced, or the production whose period of revolution is equal to the of radiation, by a radio transmitting station. period of rotation of the Earth about its axis. Evolutionary planning approach–procedure by Harmful interference–interference that en- which frequency assignments and orbital lo- dangers the functioning
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