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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B1. Istanbul 2004 
  
  
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Figure 8 Geometric Accuracy after All Corrections 
(ch.23, mirror A and B) 
3. CONCLUSION 
The processing system at the EOC for geometric correction was 
modified on the following three steps. 
1) The alignment of the GLI sensor against the satellite 
(Sat/GLI alignment) was corrected on the base of photo- 
grammetry by using the collinearity equations. 
2) The addresses of detectors on the focal plane were modified 
for the correction of the dependency of errors on channel 
number. 
3) The difference of mirror A/B side was corrected by using the 
collinearity equations, too. 
The geometric accuracy just after the launch was a few kilo- 
meters on the ground. By the modification of processing system 
at the EOC, the accuracy was improved so that it will be 
expected about 1 pixel for 250m channel and less than one pixel 
for Ikm channel image. 
For the GLI products in which a higher accuracy is needed like 
image composites, the precise geometric correction will be 
conducted scene by scene using GCPs, where the satellite 
attitude is treated as unknown. If a few GCPs are acquired for 
one scene, the geometric accuracy of 250m image will be less 
than one pixel. 
Unfortunately, the ADEOS-II satellite was terminated on 
October 2003. The lifetime was only about ten months. It 
became impossible to monitor the earth environments in long 
term, however, the data acquired in the operational term are 
very important for various researches on the Earth Science. 
Those data are processed to higher level products like 
vegetation indices, SST, ocean colors, optical thickness, etc. 
References: 
JAXA/EORC, 2003, *ADEOS-II - Reference Handbook — 
http://sharaku.eorc.jaxa.jp/ADEOS2/doc/document j.html 
(accessed 28 April. 2004) 
Paul Wessel, 1999, “GSHHS — A Global Self-consistent, 
Hierarchical, High-resolution Shoreline database -*, 
http://www.soest.hawaii.cdu/wessel/gshhs/gshhs. html 
(accessed 28 April. 2004)