GLOSSARY


AED:

Analysis, experiment, and development

AFRTS:

Armed Forces Radio and Television Services

AM:

Amplitude modulation

AOA:

Angle of arrival


BBC:

British Broadcasting Corporation


dB:

Decibel

DBS:

Direct broadcast satellite

DBS-A:

Direct audio broadcasting by satellite


EHF:

Extremely high frequency

EMP:

Electromagnetic pulse


FEMA:

Federal Emergency Management Agency

FM:

Frequency modulation


GHz:

Gigahertz

GWEN:

Ground Wave Emergency Network


HEMP:

High altitude electromagnetic pulse

HF:

High frequency


INSAT:

Indian National Satellite

IONCAP:

Ionospheric Communications Analysis and Prediction, a computer program

IONSUM:

Acronym standing for IONCAP SUMmary, a computer program

ITU:

International Telecommunication Union, an organization of the United Nations


km:

Kilometer

kW:

Kilowatt


LPC:

Linear predictive coding


MW:

Medium wave



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OCR for page 56
Antennas, Satellite Broadcasting, and Emergency Preparedness for the Voice of America GLOSSARY AED: Analysis, experiment, and development AFRTS: Armed Forces Radio and Television Services AM: Amplitude modulation AOA: Angle of arrival BBC: British Broadcasting Corporation dB: Decibel DBS: Direct broadcast satellite DBS-A: Direct audio broadcasting by satellite EHF: Extremely high frequency EMP: Electromagnetic pulse FEMA: Federal Emergency Management Agency FM: Frequency modulation GHz: Gigahertz GWEN: Ground Wave Emergency Network HEMP: High altitude electromagnetic pulse HF: High frequency INSAT: Indian National Satellite IONCAP: Ionospheric Communications Analysis and Prediction, a computer program IONSUM: Acronym standing for IONCAP SUMmary, a computer program ITU: International Telecommunication Union, an organization of the United Nations km: Kilometer kW: Kilowatt LPC: Linear predictive coding MW: Medium wave

OCR for page 56
Antennas, Satellite Broadcasting, and Emergency Preparedness for the Voice of America NASA: National Aeronautics and Space Administration NCC: National Coordinating Center NCS: National Communications System NSDD: National Security Decision Directive NSEP: National Security Emergency Preparedness NSTAC: National Security Telecommunications Advisory Committee OMNCS: Office of the Manager, National Communications System PN: Pseudo noise RF: Radio frequency SHF: Super high frequency STLs: Studio to transmitter links SW: Short wave TCI: Technology for Communications, International UHF: Ultra high frequency USIA: United States Information Agency VALSUM: VALidation SUMmary, a computer program VHF: Very high frequency VSWR: Voltage standing wave ratio WARC: World Administrative Radio Conference

OCR for page 56
Antennas, Satellite Broadcasting, and Emergency Preparedness for the Voice of America This page in the original is blank.