^III, Part 7B
In: Wagner W., Szekely, B. (eds.): ISPRS TC VII Symposium - 100 Years ISPRS, Vienna, Austria, July 5-7, 2010, IAPRS, Vol. XXXVIII, Part 7B
thirteen flight
, garden, zoo
aveform data
the company
LMS-Q560,
:an frequency
km/h, the fly-
t 30°. These
a mean point
meter and a
; meteorolog-
id from three
of Vienna.
building roof
Maria There-
(see figure 3)
zero angle of
phalt regions
•y the RIEGL
the three big
:asured.
casern in the
he south of
eneous area
ference sur-
his area en-
lues, which
i) shows the
fight strips,
and echoes
irn strip the
h, while for
his can also
hows range
acquired at
/estern strip
;les also the
the effects
e range and
ws the orig-
f incidence,
angle of in
33723 ' ,
50
40
¡30
(a) f
■ ! ; • T ■ "
' ’Kj
0 20
1
s**
3370« t • 9L
-2050 -2000 -1950 -1900 -K
® 10
50 5
r
iO 500 510 520 530 540 550 560 570 58C
shows homogeneous values for increasing range and angle of in
cidence. The backscattering coefficient 7 (see figure 4(d)) shows
a slight decrease, while <r° (see figure 4(e)) shows a stronger de
crease as expected. The incidence angle corrected value ae (see
figure 4(f)) seems to overcorrect, while 70 (see figure 4(g)) again
delivers homogeneous values over the whole observed range and
angle of incidence spectrum.
4 / i v./
'j&i . <*> f' ■ *
angle of incidence {’1
Figure 4: Colour-coded echoes of the parade yard of the Maria
Theresia casern: points of western flight strip in green and points
of eastern flight strip in blue, (a) coordinates of the echoes next to
a diagram of range versus angle of incidence; (b) original ampli
tude measurements; (c) backscatter cross section <7; (d) backscat
tering coefficient 7; (e) backscattering coefficient a 0 ; (f) inci
dence angle corrected cross section <jq and (g) incidence angle
corrected backscattering coefficient 70. (b) - (g) specific value
versus angle of incidence (left) and versus range (right).
cidence can clearly be seen. Since the parade yard is a horizontal
surface, the backscatter cross section a (see figure 4(c)) already
