"mayo her 
CANES EE 
T XU PS 
  
  
  
  
5 ++ — | 
aa ns 
| 
deer ak ka sat Le 
peau 
N ER T = 
| ocn bike Eee aa d 
ps aps 
ait ce eei 
lists e| oio rr pa So 
vs onem — il = 
Rp 
| | | | 
Fig. 1 The Rheidt Test Area With Recommended Flight Strips. 
The area is a square of 2 x 2 km. 
8. ACKNOWLEDGEMENTS 
As has been already shown in the previous chapters, the valuable 
help of Messrs. HANSA LUFTBILD and RHEINISCHE BRAUNKOHLENWERKE, flying 
and processing films free of charge, is thankfully acknowledged. A con- 
siderable amount of measurements and computations has been carried out 
by Ing. (grad.) W. SCHRÔTER under a grant from the DEUTSCHE FORSCHUNGS- 
GEMEINSCHAFT. After initial programming by Dr. MAUELSHAGEN, updating 
and refinement of the bundle programm BOBUE was written by Dipl.-Ing. 
H. ELLENBECK, who also supervised computing at the REGIONALES HOCH- 
SCHULRECHENZENTRUM BONN at an IBM 370/168. Part of recent computations 
referred to has been carried out by cand.ing. FEIH and STAUBUS within 
the frame of their diploma theses. 
14 
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