BOTEN "s m e 
3 BENENNEN TEN BON LEG LS RAE C ub MN a = 
IE FALCEM NOR ME ANR NE SEN Ya EEE dA OO NOLO NL DNE BURG Lu A Ld 
a de SRC NN B = - 
pattern of CCD linear sensor array, and Fig. 3 shows its real aperture 
pattern. 
For the ideal -aperture pattern, the MIF is given by following 
equation. 
sin 20477 (3) 
MTF). =2ah 
(NTE) =2 = 
Here, f : spatial frequency of the object 
& : 15 of aperture of a sensor element 
In this ideal pattern, the cut off frequency of sensor array fe is 6 9 
1000/2a( Jft/fnm.) , and does not depend on the irradiated wave length. 
.However, the real aperture pattern of CCD array is-ag Fig. 3. 
In this real pattern the MIF depends on the irradiated wave length. 
The MTF is given by following equation. 
h 
74? [04(A) - 0] 
  
(MTF),= sin[a.(A)-d)}érc- sin) + &WHT 4) 
Here, a; (A), ax(A) are as shown in Fig. 3. The cut off frequency fc is 
1000/2, (A) +a, (A) (Lefnm. ) . and especially the length | a2(A) varies with 
the irradiated wave length A , so the fc also depends on the wave length. 
Fig. h is an example of the variation of MTF characteristics by the 
aperture pattern. 
1. 6 € 
3. Characteristics of the other components 
of electronic self-scanner. 
Fig. 5 is a typical OTF characteristic of optics. 
Fig. 6 is the spectral response of two samples from a CCD linear 
array. Here we can see so called streaking phenomenon. 
Fig. 7 is the sensitivity characteristic of a CCD array. 
4. Conceptual design of electronic self-scanning 
radiometer for MOS. 
MOS-1 will take a non-sunsynchronous orbit with medium inclination 
angle (5094. 109). Its altitude will be 870 km. Other design parameters 
are shown in Table 3.