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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
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Solar Spectra Irradiance 
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5800 6000 6200 6400 
Wavenumber (cm-1) 
5200 5400 
Figure 8. Sample of the spectra measured on the ground with 
the bread board model. 
4. SPACECRAFT 
GOSAT is a medium-size satellite which weighs 1650kg. It 
will be launched by H-IIA rocket of JAXA in early 2008. 
Figure 9 illustrate the image of GOSAT on orbit and table 2 
shows the summary of the GOSAT satellite. 
  
  
  
     
  
Star 
Tracker CH /L3 \ Solar Array 
S LU Paddle 
Cloud and 
aerosol sensor 
Main body 
Greenhouse 
aases Sensor X-band antenna 
Figure 9. GOSAT on orbit. 
Table 2. GOSAT characteristics. 
  
  
  
  
  
  
  
  
  
  
  
  
  
Size Main body 135x2x32m 
Mass Total 1650kg 
Power Total 3319W (@B=0°) 
Life Span 5 years 
Orbit Altitude 618km 
Inclination 65deg 
Telemetry IS band) Command ‘11[kbps] 
and HK telemetry! :32.8[kbps 
Command .1X band! Mission Telemetry! 120 [Mbps] 
Launch Vehicle H-IIA 
Schedule Feb.2008 
  
  
  
  
5. CONCLUSION 
GOSAT project finished its internal project readiness review 
(PRR) in November 2003, and has started its phase-B study. 
The bread board model results provided the feasibility of nadir- 
looking scattered light measurements for monitoring 
greenhouse gases (CO; and CH.) globally with 0.2 em” spectral 
resolution in the SWIR region. 
227 
6. ACKNOWLEDGEMENTS 
The authors wish to express thanks to Gen Inoue, Tatsuya 
Yokota, and Hiroyuki Oguma of NIES for their useful 
suggestions.