304 
(b) 
Figure 2. A part of opposite side stereo images: (a) image 
obtained by flight line 9; (b) image obtained by flight line 14 
Using the same data, according to classical F.Leberl model 11111 ’ 21 
and polynomial orthorectification model, a same experiment of 
same side and opposite side stereo modes has been done. The 
experiment results of two stereo position methods are shown in 
Table 1. 
Table 1 Accuracy comparison of two stereo position methods 
Unit: (m) 
F.Leberl model 
Polynomial 
orthorectification model 
Same 
side 
Opposite 
side 
Same 
side 
Opposite 
side 
Mean 
square 
error (X) 
Mean 
±2.0 
±2.9 
±2.4 
±4.9 
square 
error (Y) 
Mean 
±5.1 
±2.4 
±6.8 
±3.0 
square 
error (Z) 
±16.0 
±2.8 
±17.4 
±3.9 
Comparing with the results of two stereo position methods, it is 
clear that: although the experimental results of F.Leberl model 
are better than the position method suggested in this paper, 
there are a few differences between them, especially in the 
opposite side and cross stereo modes, the differences are much 
fewer. 
5. CONCLUSION 
With the rapid development of SAR technology, it is becoming 
easily to obtain stereo SAR images by satellite and plane. It 
also provides a chance for StereoSAR research, especially with 
the appearance of high resolution SAR image, the accuracy of 
generating DEM will be enhanced. So the appliance foreground 
of StereoSAR must be better. 
In this paper, several stereo position models have been 
compared in detail, calculating flow of polynomial 
orthorectification model has been improved, and validity of this 
model has been tested by experiments. Comparing with the 
classical F.Leberl model, this method is practical and easy to 
achieve, and the results between them have few differences, so 
it is proved that the model studied in this paper has a practical 
application value. 
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