Lns siGe-looring raGar systems developeé in the last
uecade maxes possibie obtaining of verrain imaces at any time
sf the day snd in any
E
£A
t "
el
fet
g
=
in
“
5
et
2
LY
(b
H
co cloudiness, the
images deine by their nature close to hotours phic ones. Such
systems found wide set cation wher investigating in areas
with severe meteorociogical conditions vhere otherwise no ine
formation could be derived. Resides, these systens being
based on The principle of recording electromagnetic (micro
wave) radiation reflected Prox the terrain objects enable
one to obtain, in specific cases, entirely new information
on the nature cf the ground &s compared with that gaîned fron
Birphotos. °
Io the USSR the "Toros™ slde-looking radar system was
produced intended for the ice exploration purposes. In a
short time the system has found extensive use for both the
evaluation and prognosis of the ice state in the unfsvour-
able meteorological conditions of the Arctic as well as for
the speedy chtaininz of ter rr&in imagen for vast territories
n geologic prospect ing. s
Surveying with "Toros" is performed by two narrow beams
formed by rarabolic antennae erranged along the aircraft fu-
selage and directed normal to Their axes.
Image scanning along the flight line is effected Through
the aircraft translational movement, the image being formed
on the screens of the C.R.T. operative indicators and record-
ed simultaneously oo the photographic film of 19 cm width
moving with the velocity proportional to the ebsclute veloci-
ty of the aircraft and to the survey scale. By this means one
obtsins, recorded on the film, the photographic image whose
density at each point is a function of the reflecting proper
ties of ths terrain objects for the given range of wave-
lengths.
Due to the centimetre wavelengths, narrow directional
diagrem in horizontal plane,asnd Shorteduration pulse (as frac
tions of a sec second) the "Toros" system makes it possible to
obtain terrain image with high resolution close to that of
i
cu
enr
eu
fr
