forward scatter — forward scatter, the scattering of radio waves which pass into the troposphere or ionosphere by a combination of reflection, refraction, and diffraction. It tends to direct the waves forward and downward, thus enabling the transmission of radio… … Useful english dictionary
forward scatter — The scattering of radiated energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the side toward which the incident radiation was advancing. The opposite of backward scatter. In… … Aviation dictionary
Bistatic radar — is the name given to a radar system which comprises a transmitter and receiver which are separated by a distance that is comparable to the expected target distance. Conversely, a radar in which the transmitter and receiver are collocated is… … Wikipedia
Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… … Wikipedia
Kolchuga passive sensor — The Kolchuga passive sensor is an ESM system developed in Ukraine. Its detection range is limited by line of sight but may be up to 800 km (500 miles) for very high altitude, very powerful emitters. Frequently referred to as Kolchuga Radar , the… … Wikipedia
warning system — ▪ military technology Introduction in military science, any method used to detect the situation or intention of an enemy so that warning can be given. Because military tactics from time immemorial have stressed the value of surprise… … Universalium
Flow cytometry — Analysis of a marine sample of photosynthetic picoplankton by flow cytometry showing three different populations (Prochlorococcus, Synechococcus, and picoeukaryotes) Flow cytometry (abbreviated: FCM) is a technique for counting and examining… … Wikipedia
List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… … Wikipedia
over-the-horizon radar — A radar system that makes use of the atmospheric reflection and refraction phenomena to extend its range of detection beyond line of sight. Over the horizon radars may be either forward scatter or back scatter systems … Military dictionary
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