forward scatteringn.

(a) Physics. Scattering in which the direction of the scattered radiation or particles makes an angle of less than ninety degrees with the original direction. (b) Telecommunications. Scattering or reflection of high-frequency radio waves by irregularities in the troposphere or ionosphere so that some of their energy returns to earth beyond the horizon of the point of transmission.

ΘΚΠ

society > communication > telecommunication > radio communications > [noun] > radio wave > scattering of

forward scattering1950

scatter1950

tropospheric scatter1955

tropo1957

troposcatter1957

the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > direction of scattering

forward scattering1950

1950 Proc. IRE 38 406/1 This formula for forward scattering applies no matter what may be the relation of the scale of turbulence to the wavelength.

1952 Physical Rev. 86 1 (heading) Forward scattering of light by a Coulomb field.

1967 L. S. Rodberg & R. M. Thaler Introd. Quantum Theory of Scattering xii. 370 For a large target of uniform particle density..only forward scattering will occur.

1968 W. G. Burrows V.H.F. Radio Wave Propag. 6 The propagation of a VHF wave beyond the radio horizon by forward scattering.

Derivatives

forward scatter n. (also forward-scatter) (a) forward scattering (sense b); (b) radio waves that have returned to earth after being scattered in this way.

ΚΠ

1954 Canad. Jrnl. Physics 32 450 Reflections from meteoric trails can support, intermittently, high frequency radio transmissions well beyond the line-of-sight... The Stamford workers have developed a theory of this forward-scatter transmission.

1956 Ann. Reg. 1955 409 Waves reflected from the E-layer..and sent on by ‘forward scatter’.

1958 Times 30 Apr. 6/6 Experiments are to be carried out in Britain to ascertain whether television pictures can be transmitted by the ‘forward scatter’ technique over distances of 200 miles or more.

1960 Gloss. Terms Telecomm. (B.S.I.) 168 A signal received by forward scattering is often referred to as forward scatter.

forward-scatter v. [as a back-formation] (transitive) .

ΚΠ

1954 Proc. IRE 42 530/1 Echoes forward-scattered from individual meteor ionization trails.

forward-scattered adj.

ΚΠ

1953 Jrnl. Geophysical Res. 58 90 The amplitude of the forward-scattered signal exceeds that of an equivalent back-scattered signal.

This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).

单词	forward scattering
释义	forward scatteringn. (a) Physics. Scattering in which the direction of the scattered radiation or particles makes an angle of less than ninety degrees with the original direction. (b) Telecommunications. Scattering or reflection of high-frequency radio waves by irregularities in the troposphere or ionosphere so that some of their energy returns to earth beyond the horizon of the point of transmission. ΘΚΠ society > communication > telecommunication > radio communications > [noun] > radio wave > scattering of forward scattering1950 scatter1950 tropospheric scatter1955 tropo1957 troposcatter1957 the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > direction of scattering forward scattering1950 1950 Proc. IRE 38 406/1 This formula for forward scattering applies no matter what may be the relation of the scale of turbulence to the wavelength. 1952 Physical Rev. 86 1 (heading) Forward scattering of light by a Coulomb field. 1967 L. S. Rodberg & R. M. Thaler Introd. Quantum Theory of Scattering xii. 370 For a large target of uniform particle density..only forward scattering will occur. 1968 W. G. Burrows V.H.F. Radio Wave Propag. 6 The propagation of a VHF wave beyond the radio horizon by forward scattering. Derivatives forward scatter n. (also forward-scatter) (a) forward scattering (sense b); (b) radio waves that have returned to earth after being scattered in this way. ΚΠ 1954 Canad. Jrnl. Physics 32 450 Reflections from meteoric trails can support, intermittently, high frequency radio transmissions well beyond the line-of-sight... The Stamford workers have developed a theory of this forward-scatter transmission. 1956 Ann. Reg. 1955 409 Waves reflected from the E-layer..and sent on by ‘forward scatter’. 1958 Times 30 Apr. 6/6 Experiments are to be carried out in Britain to ascertain whether television pictures can be transmitted by the ‘forward scatter’ technique over distances of 200 miles or more. 1960 Gloss. Terms Telecomm. (B.S.I.) 168 A signal received by forward scattering is often referred to as forward scatter. forward-scatter v. [as a back-formation] (transitive) . ΚΠ 1954 Proc. IRE 42 530/1 Echoes forward-scattered from individual meteor ionization trails. forward-scattered adj. ΚΠ 1953 Jrnl. Geophysical Res. 58 90 The amplitude of the forward-scattered signal exceeds that of an equivalent back-scattered signal. This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018). < n.1950
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