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Landsat TM data processing system at EOC/NASDA 
S.Yamamoto, 
C. ishida 
and 
K.Tachi 
National Space Development Agency of Japan 
Earth Observation Center(EOC) 
Japan 
II/4 
Abstract 
Japanese TM data processing system,which is based upon 
V 90/50 host computer(32 bits,4 MBytes main memory) and array 
processor(AP 120 B), was installed at Earth Observation 
Center/National Space Development Agency of Japan (EOC/HASDA) 
in. Sep. 1983. 
we don't have TM descending data over Japan . However, 
prelimimary TM data evaluation experiments were made using 
TH HDT's which were provided by NASA and NOAA. 
m Introduction 
The development of TM data processing system started in 
1981 and the hardware construction finished in Aug. 1983, 
The installation and adjustments of the system took place from 
Aug. to Sep. and acceptance tests were conducted by the end 
of Sep. 7983. | 
The total system became functional then,but verification 
of radiometric and geometric correction accuracies has been 
suspended until Landsat5 TM data over Japan become available. 
Fortunatlly some TM HDT's were provided by NASA and NOAA, 
so we have continued prelimimary evaluation experiments on 
TM data characteristics. 
This paper describes our TM data processing hardware 
and software system and also summarizes the result of the TM 
data evaluation experiments in our center.