In order to make full use of earth observation 
data for environmental problem, meaningful 
physical quantity is extracted and data sets 
should be constructed. Moreover,catalog of earth 
observation data and data as itself should be 
transfered through communication network. 
Concerning data sets, NASDA is planning to 
construct MOS-l/MOS-lb datasets, ERS-l/JERS-1 
datasets, ADEOS/TRMM datasets and POP datasets as 
shown in Fig.2. Table 2, 3 and 4 show examples of 
spaceborne sensor data for ocean, land and 
atmosphere monitorings,respectively.Catalog 
network should be constructed and NASDA is 
evaluating PID (Prototype International Directry) 
proposed by CEOS and maintain an node in Asia. 
Concerning MOS-l/MOS-lb, datasets will be 
experimentally constructed in collaboration with 
several domestic investigators and datasets 
concerning sea surface temperature (SST) and 
polar ice will be demonstrated for ISY 
(International Space Year:1992). The first SST 
workshop was held by NASDA during March 14-15, 
1990 in Tokyo where ESA, RAL(Rutherford Appleton 
Laboratory),N0AA attended and mergings VTIR/AVHRR 
and ATSR/AVHRR were discussed. Meeting of experts 
on worldwide network for global environmental 
monitoring from space was held by STA(Science 
Technology Agency)/NASDA on April 16,1990 in 
Tokyo and various problems of global 
environmental data network were discussed. These 
were also discussed in 8th meeting of CEOS 
working group on data hosted by NASDA during 
April 17-19,1990 in Tokyo. Moreover, the third 
SAFISY(Space Agency Forum on the International 
Space Year) was held in Kyoto during May 17- 
18,1990 and hosted by the Space Activities 
Commission of Japan (SAC),STA,NASDA and ISAS 
(Institute of Space and Astronautical Science) in 
Japan where main theme is earth environmental 
problem. 
Table 3 Examples of Spaceborne Sensor Data for Land Monitoring 
Item 
Specifications 
Name of Satel1ite/ 
MOS-l/lb 
ERS-1 
ADE0S 
Landsat6 
SPOT 1-3 
E0S-A 
ERS-1 
JERS-1 
Sensor 
MESSR 
0PS 
AVNIR 
ETM 
HRV 
IT IR 
SAR 
SAR 
Wavelengths(pm) 
0.40-0.50 
0.45-0.52 
Frequencies(GHz) 
0.51-0.59 
0.52-0.60 
0.52-0.62 
0.52-0.60 
0.50-0.59 
0.52-0.60 
1.275GHz 
0.61-0.69 
0.63-0.69 
0.62-0.72 
0.63-0.69 
0.61-0.68 
0.63-0.69 
5.3GHz 
HH 
0.72-0.80 
0.76-0.86 
0.82-0.92 
0.76-0.90 
0.79-0.89 
0.76-0.86 
VV 
0.80-1.10 
0.76-0.86 
0.52-0.72* 
0.50-0.90* 
0.51-0.73* 
1.60-1.71 
1.60-1.71 
1.55-1.75 
2.02-2.12 
2.01-2.12 
2.08-2.35 
2.12-2.19 
2.13-2.25 
2.19-2.26 
2.27-2.40 
2.29-2.36 
2.36-2.43 
8.125-8.475 
8.475-8.825 
8.925-9.275 
10.4-12.5 
10.25-10.95 
10.95-11.65 
Nominal Spatial 
50 
18 
16 
30 
20 
15CVNIR) 
30*** 
18*** 
Resolution (m) 
8* 
15* 
10* 
30(SWIR) 
120** 
90** 
Swath Width(km) 
100 
75 
80 
185 
65 
60 
100 
75 
Stereo Capabi 1 ity 
None 
None 
None 
None 
* Panchromatic **Thermal band ***31ooks 
Table 4 Examples of Spaceborne Sensor Data for Atmospheric Monitoring(l) 
Items 
Specifications 
Name of Satel1ite/ 
M0S-1 
Nimbus 7 
DMSP 
ERS-1 
POP 
TRMM 
TRMM 
Sensor 
MSR 
SMMR 
SSM/I 
M.S. 
AMSR 
PR 
M.R. 
Frequencies(GHz) 
6.6 
6.6 
10.7 
10.65 
14 
18 
19.35 
18.7 
19 
23.8 
21 
22.235 
23.8 
21.0 
31.4 
37 
37 
36.5 
36.5 
37 
85.5 
90 
90 
Nominal Spatial 
30(23.8) 
148(6.6) 
20 
59(6.6) 
4 
10 
Resolution(km) 
20(31.4) 
27(37) 
11(90) 
Swath Width(km) 
317 
659 
1400 
1660 
220 
600 
537