A. Rothkirch 
  
  
  
  
  
  
  
  
  
      
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Spectralon, 0, = 30 Re d roof tile: = 2307 E 
0.12 [^ rT ENT 0.14 d reef e. d 307 s 20 nded roofi. Da per: 6. = 30? 
/ | O Da E EUR Tp etr 
A4 
0.10} Ka. o.12F SS 
; / 
m 0.10} /N / 
cu 0.05 A, — T rm / / 
= : EHH tH ~ 0.08 ] o / 
006 uut — ; - 
= fug Le $ > = 0.0 J 
x = 0.06 | p E 
0.0.04 en Y à Œ re 
X IN - - £n N X 
o. oor P A S p D ix OO 
0.02 anal TP HTH Hp $ Mos 
0.00 L. 5 vl, Las 0.00 
50 0 50 is Le 0 T som d e E 
Viewina 7e IA Ts 90 Ü 50 En i; zs + 
Viewing zenit angle [deg] Viewing zenit angle [deg] Vie C cn 9 = 
J 0 Viewing zenit angle [deg] 
Speciralon: 8, = 45° Red roo >" 6 159 
BL eg roof tile: 8, = 45° Bnei pm 0 
0.20 =r T ro; 0257777 DAS 5 Ranged roof pg per; 6 4 5° 
le] | - 
eft the Nis 0.20 1 0.050 + | 
n the right | 
1arter-arcs e IX. ] e adis — 0.040} | 1 
X^ | N ; > / 7 o 
= es | L = 0030; / 4 
x e 1 x 0.10 / Es / 
e HHH | a ; fs ; 
je out que | m 0.0206 / 
0 | EC X < 3 
| 0.0* Va SE RR SE VX X / 
IVe azimut | HH HEE ORO i ps tie 
: OO | | | - | 6 
pal plane, : el ik d gig LA Ea 0.000 i Vr 
: 50 50 n = = ee É I ys . 4 
aterials (a fewng-sentoncle Tes] X 0 50 50 T 50 
j N ) ces viewing zenit angle |dec = I 
Labsphere e ngle [d 3] Viewing zenit angle [deg] 
values f, os ment TION C = Do Red roof tile; 0, 2 55 Sanded roof Dpober. b EO 
U.20 E | 0 AA 1L ————LT——-—, DUTHOGCC oo Yaper; 9g z 5 At 
measured | | «| t T i esce ES 
4 | | { 
"7 | | | 
| } / ^ 
; | 0.0¢ | -] 
umn gives = | ma | | 
46°, 56° | ids d | 7 J 
light and Hu: | csl ) ] 
its and the X [> 2X | ) | 5 / 
t | Cn | Z / 
l. NH | | = 
I RH | ^^ ES x 
[ | 0.02 | ; A 
asing inci- | | iin ESA po OPES RE | 
d roof tile DOO[. rre tenir ss Fo AFH ; TH 
| | | | AUS Bus) o.:00[-. tu su t 
ing zenith | ES = : Sr 
: Viewil enit. angle leq ewina Zerit annle d ; us 
cases with | Viewing nit angl [de g] Viewing zenit angle [deg] 
sere found pectralon; : 6: Red roof ) — BES | 
: (pop Ei ned roof ule, o, D Sanded. roof: paper: 8. = 65° 
mum ratio 60| | up T o 1anded ront paper = OF 
1 around à | 
0; = 55 | 0:10 54 
A e] t | 
= 65° and = 0) | 
- | — \ | 
| OK / 
> measure: u 02] | — | | — oo / 
| roof tile, 5 | | " | 
ments, the | | Q 004 ] 
s different | | 
| 0.02 Le ] a 
us e ol. 1 HH | ann HHH 
n forward pied I IS 
-— ) 10) 
| je ;] Viewing zenit angle [deg] Viewing zenit angle [deg] 
per. This 
from nadir 
>nith angle 
etry of the 
hough this 
Figure 2: Measure à iqueb 
4m x ; A BRDF values of different surface materials in the principal plane. Each column gives the measured 
£ S pe 1 "2 > 2 . "n > * . A . . . . * > 
nd ace depending on viewing zenith angle 0, at different illumination angles 0;. The solid lines indicate 
S ents arizati ‘tate cc a ‘he 1 1 1 a 
RATER s at polarization state 5s, the dashed lines indicate sp, the crosses show pp-measurements and the plus-signs 
A ar Negative viewing zenith angles correspond to backward scattering direction. 
e = 60°. i = 05° the used field of view was t ive r iewi 
ed field of view was too small to give reasonable results at low viewing angles 6,.. 
ET 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000. 779