RESULT OF ANALYSIS 
Using the synchronous observation data of Landsat-MSS and NOAA-AVHRR shown 
in Table 1, the author tried digital analysis due to the processing method 
described in ANALYSIS METHOD section and satisfactory result are carried out. 
The data of NOAA-AVHRR is the same as that of Landsat-MSS except the data 
set of No. 4 and 5. The observation time of NOAA-6 is between 7:30 and 8:30 
a.m., which is about 2 hours earlier than that of Landsat. So, the time 
difference of both satellite is considered as the boundary of simultaneous 
observation in the study of marine science. 
Fig. 6,7 and 8 show the superimposed images of the processed Landsat-MSS 
Band 4 images and the sea surface temperature maps(SST maps) obtained through 
the analysis of data No. 1,2 and 3 shown in Table l. As the temprature values 
shown in the figures are the values directly obtained from the calibration 
procedure described in section Analysis of NOAA-AVHRR data and the absolute 
values are considered to be several degrees in centigrade lower than those of 
actual SST due to the effect of atmospheric absorption. 
In the three figures, the radiance pattern of MSS Band has high correla- 
tion with the SST pattern. In Figure 6, for example, in the northern coastal 
region of Hiuchi-nada and Harima-nada in Seto Inland Sea it can be seen that 
radiance of MSS Band-4 is higher while SST is lower compared with those of the 
central and southern parts. On the other hand, the central and southern part of 
Harima-nada and Kii-suido show relatively low radiance and high SST and this 
negative correlation suggests that the SST of high turbidity water is lower than 
that of clean water. 
In Fig. 7 and 8, this negative correlation between radiance and SST is also 
recognized in the western coastal area of lse-bay and in the north-western part 
pf Kii-suido. |n Fig. 7, several interesting circulation patterns are seen in 
MSS Band 4 within Osaka-bay, howeve, no remarkable difference in SST in the 
area of the circulation patterns, which is considered due to the limitaion of 
spatial resolution of NOAA-AVHRR. 
  
DISCUSSION 
The negative correlation between radiance or reflectance of turbid water 
and its surface temperature found out in the analysis is an interesting fact 
since the surface temperature of polluted water generally has been considered to 
be higher than that of cean water. Considering the seasonal effect, the tempe- 
rature of land originating water is generally lower than that of the water which 
is a part of warm current(Kuroshio current). Therefore, in Hiuchi-nada and 
Harima-nada in Fig. 6, the water pollution is considered to be mainly due to the 
drainage or river effluent originating from the coastal land areas of Chugoku- 
district and Kinki-district where high population area and industrial area are 
concentrated respectively. 
In the case of Ise-bay (Fig. 8), the polluted and low temperature water is 
found in northern and western coastal areas, where in addition to large Kiso- 
river and Ibi-river, the small rivers flow out into the inlet. In Ise-bay, a 
counterclockwise circulation generally prevails with the result that the western 
coastal area is highly influenced by the river effluent. Fig. 8 verifies the 
above started result. The synchronization of Landsat and NOAA is one of the 
problems in the analysis. In case of the examples indicated here, time 
difference of observation by Landsat and NOAA-6 is only 2 hours, therefore 
synchronization seems to be satisfactory for marine applications. Unfortunately, 
however, NOAA-6 has become out of order and now only NOAA-7 is available. 
The pass of NOAA-7 is 5 or 6 hous later than that of Landsat. Thus, in the 
coastal region where the influence of tidal current is high and time difference 
may bring some problems to be the results of analysis. However, in open sea 
areas, since the SST pattern is considered to be nearly constant during l'or 2 
days and the combination of Landsat and NOAA-7 is considered as effective for 
investigating both the environmental condition of coastal areas and open sea 
areas affecting the former condition. 
   
    
    
     
    
  
      
   
   
    
   
    
    
  
  
      
  
   
  
   
    
    
     
  
   
   
     
   
   
    
    
    
   
   
   
CONCLUS I 
The f 
AVHRR date 
problems c 
remain, th 
routinized 
environmen 
thanks to 
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Kiyoshi Ts 
analysis a 
Research f 
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