can detect global sea surface temperature and 
chlorophyl concentration. In order to minimize 
sun glitter, the field of view must be pointable 
on command and has tilting mechanism along track 
to either side of nadir. Concerning AVNIR, 
spatial resolution is 16m (multi-band) and 
8m (panchromatic band). AVNIR is more advanced 
radiometer than MOS-1 MESSR, JERS-1 OPS. 
ADEOS will provide environmental data sets in 
ocean, land and atmosphere. OCTS is mainly for 
ocean, AVNIR is mainly for land and 6 AO sensors 
are for atmosphere. 
4.3 TRMM System 
TRMM (Tropical Rainfall Measuring Mission) will 
be launched by H-II rocket in 1996. This is a 
joint project between NASA and NASDA. NASDA will 
provide the precipitation radar (PR) in 
collaboration with CRL (Communication Research 
Laboratory) and launch TRMM by H-II rocket and 
NASA will provide the spacecraft, microwave 
radiometer,AVHRR and data system. The altitude of 
the TRMM is 350km and its inclination is 35 
degrees. So, rainfall will be observed around 
tropical region and seasonal rainfront called 
"Baiu" appearing every June over the southern 
ocean of Japan also will be observed. 
4.4 POP System 
As a part of mission to planet earth, NASA will 
launch two series of polar platforms EOS-A and 
EOS-B, ESA also will launch two series of polar 
platforms ESA N1 and ESA Ml. NASDA is planning to 
launch JPOP (Japanese Polar Platform)in 1998. The 
detailed mission scenario of JPOP has been 
studied under the committees supported by NASDA. 
4.5 Global Datasets and Data Network 
Table 2 Examples of Spaceborne Sensor Data for Ocean Monitoring 
Items 
Specifications 
Name of Satel1 ite/ 
Sensor 
MOS-1 
VT1R 
ADEOS 
OCTS 
N0AA 
AVHRR 
ERS-1 
ATSR 
Nimbus7 
CZCS 
ERS-1 
AM ICImage) 
ERS-1 
AMI(Wave) 
ERS-1 
RA 
Wavelengths(pm) 
Frequencies (GHz) 
0.5-0.7 
0.402-0.422 
0.433-0.453 
0.480-0.500 
0.510-0.530 
0.555-0.575 
0.655-0.675 
0.745-0.785 
0.845-0.885 
0.58- 0.68 
0.725-1.10 
0.433-0.453 
0.510-0.530 
0.540-0.560 
0.660-0.680 
0.700-0.800 
5.3 GHz 
5.3 GHz 
13.7 GHz 
6.0-7.0 
10.5- 11.5 
11.5- 12.5 
3.55 -3.85 
8.00 -9.00 
10.5 -11.5 
11.5 -12.5 
3.55 -3.93 
10.3 -11.3 
11.5 -12.5 
3.7 
11 
12 
10.5-12.5 
Nominal Spatial 
Resolution(m) 
900 
2700 
700 
1100 
1000 
850 
30 
(31ooks) 
Radiometric ( K) 
Resolution 
0.5 
0.1 
0.12 
0.1 
0.22 
N. A. 
N. A. 
N. A. 
Swath ffidth(km) 
1500 
1400 
2700 
500 
1636 
80 
5 
536