... the bandwidth of the scattered signal and not of the
transmitted one (matched filtration) for noise bandwidth computing. However, the
signal-to-noise ratio worsens by thousands of times, and the ... particles, and the frequency broad-
ening of the signals is determined by their thermal velocities. The Doppler broad-
ening of a spectrum is estimated by the valu...
... Press
66 Radio Propagation and Remote Sensing of the Environment
logical compared to their energy flows. If the following is the power flow density
of the incident wave:
then the flow density of its ... Press
76 Radio Propagation and Remote Sensing of the Environment
, (3.94)
where, as before, F
23
(d) is the Fresnel coefficient of reflection from t...
... for remote sensing of the environment are mounted on the surface of
the Earth, on ships and riverboats, and on air- and spacecraft. Earth-mounted radar
is used for the study of the atmosphere and ... measurement of σ
0
permits us to
estimate the height of the sea waves and then draw conclusions about the velocity
of the near-surface winds. Knowle...
... Press
52 Radio Propagation and Remote Sensing of the Environment
(2.93)
which occurs when the frequency of the received wave is more than the frequency
of the radiation.
In the opposite case of mutual ... Press
48 Radio Propagation and Remote Sensing of the Environment
is proportional to the total signal energy. The corresponding calculatio...
... Press
88
Radio Propagation and Remote Sensing of the Environment
If angle
α
between the direction of the ray and the direction of the permittivity is
introduced, then:
(4 .13)
Further, it ... Press
106 Radio Propagation and Remote Sensing of the Environment
The initial eikonal value is assumed to be zero. Furthermore, let L be the d...
... Press
134 Radio Propagation and Remote Sensing of the Environment
we should take into consideration the relation between the magnetic
and electric components of the reflected wave. Then,
(5.90)
and ...
114
Radio Propagation and Remote Sensing of the Environment
volume of a medium having a single section and length
ds
along the directi...
... CRC Press
190 Radio Propagation and Remote Sensing of the Environment
which represents the section of the antenna pattern by the mean plane of the scat-
tering surface. We neglected the difference ...
186
Radio Propagation and Remote Sensing of the Environment
The probability integral is now introduced:
45
. (6.117)
At τ < 0, before the a...
...
Radio Propagation and Remote Sensing of the Environment
In this case, we can neglect the role of small-scale turbulence. Then, it is convenient
to use the relation:
(7.30)
known from the theory ...
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Radio Propagation and Remote Sensing of the Environment
7.5 THE COHERENCE FUNCTION OF A SPHERICAL
WAVE
The sources function for the spheric...