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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B5. Beijing 2008 
The SmartBase network used for the processing is comprised of 
5 reference station; four from the Can-Net VRS network 
(www.can-net.ca), and one CORS station. Figure 11 shows the 
trajectory and layout of the network. Figure 12 shows a plot of 
the distance to the nearest base station for one of the flights. As 
indicated by the peaks and valleys, the turns are anywhere from 
36 to 49 km from the nearest station. 
SSHL. 
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Figure 11. Test Flight Trajectory and SmartBase Network 
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Figure 12. Distance to Nearest Reference Station 
Two of the DSS flight tests were flown with maximum bank 
angles of 25 deg. The remaining 6 were flown with maximum 
bank angles of 30 to 40 degrees. In all cases the Applanix IN- 
Fusion technology was able to remain in fixed integer 
ambiguity mode, even during the turns. 
Figure 13 shows a plot of the roll for one of the flights that had 
bank angles up to 40 deg, with the exposure times indicated by 
the blue squares. Figure 14 shows the number of SV’s tracked 
during the same flight. During the turns this drops to as low as 5. 
Figure 15 shows the solution status for the same flight, which 
always remains in fixed integer even as SV’s come in and out 
of the solution. Table 1 provides a summary of the checkpoint 
residuals for the 8 flights. In each case the RMS accuracy is 
well within the DSS system accuracy specification of 1.2 X 
W * - * i 
effective GSD RMS horizontal and 3 X effective GSD RMS 
vertical (approximately 20 cm and 50 cm RMS respectively). 
The average RMS over the 8 flights is 11 cm and 12 cm 
horizontal, and 13 cm vertical. 
This indicates that the accuracy of the EO produced by the POS 
AV 410 is well within its specification and completely 
unaffected by flying sharp turns with distance to the nearest 
base station as large as 49 km. 
# 
Lens 
(mm 
) 
Max 
Roll 
(deg) 
RMS E 
(m) 
RMS N 
(m) 
RMS H 
(m) 
# 
GCP 
1 
60 
25 
0.17 
0.19 
0.07 
8 
2 
60 
25 
0.16 
0.17 
0.15 
7 
3 
60 
40 
0.06 
0.14 
0.09 
3 
4 
60 
30 
0.13 
0.12 
0.23 
4 
5 
60 
40 
0.12 
0.13 
0.15 
4 
6 
40 
30 
0.07 
0.09 
0.19 
2 
7 
60 
30 
0.08 
0.08 
0.07 
2 
8 
60 
35 
0.12 
0.07 
0.07 
2 
Avg 
0.11 
0.12 
0.13 
Table 1. RMS Accuracy vs GCP, 15 cm GSD 
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