Forward scatter

Forward scatter

In telecommunication and astronomy, forward scatter is the deflection--by diffraction, nonhomogeneous refraction, or nonspecular reflection by particulate matter of dimensions that are large with respect to the wavelength in question but small with respect to the beam diameter--of a portion of an incident electromagnetic wave, in such a manner that the energy so deflected propagates in a direction that is within 90° of the direction of propagation of the incident wave (i.e., the phase angle is greater than 90°).

The scattering process may be polarization-sensitive, "i.e.", incident waves that are identical in every respect but their polarization may be scattered differently.

Source: from Federal Standard 1037C


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • 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

  • Durchflusscytometrie — Dieser Artikel oder Abschnitt ist nicht hinreichend mit Belegen (Literatur, Webseiten oder Einzelnachweisen) versehen. Die fraglichen Angaben werden daher möglicherweise demnächst gelöscht. Hilf Wikipedia, indem du die Angaben recherchierst und… …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”