572
G~OUND
,IIIIACtc
----:--- -... ....... .............
"
.
SC:~N..."~_,. ~G';. •. /
-(""-.,.. ...... .- - -
SC"N~ ~-'<.:)... ......... /
..---~.NA . . . . . . ~.,
-.... ~
SCAN!,"
.-a) Scan geometry
b) 24 h coverage
.... .... ,
\ \ \ \
\
I
I
J. Noll
Figure 21.1: Scan geometry and global coverage of the SSM/! aboard the DMSP FOB spacecraft
(Hollinger et al., 1990).