INVERSION OF SYNTHETIC APERTUR,E R,ADAR (SAR) - MSpace ...

squâre pixel rvith clir¡ension of -
4 x 4 rn. A blight azitnutlt line at a neat.
range replesents the uaclir lile in Figule 5.9.
The avelage altitude of airclaft is 6 A¡¿ as shorvn in Figure 5.8, and this
value is the minirlum slant lange in the nadit rnocle. The far.thest slalt
r:alge is about 14 frrn, rvhich is mo,,..e than trvice the minirnurl slant r.ange.
Ðue to tllis configulation, the lvavefielcl plocessing approach rnay exper.ience
sorne dificulty in applying the far field apploximation in Eq.(4.23). The
spacebolne SAR configulation is rnole appropriate in telms of the far. field
a¡rproxir:ration of wavefieltì than an airl¡orne SAR configuration.
With the given platfolm velocity of ß4.76 m f sec, theilersion pr.ocessing
rvas perforrnecl on a 2048 x 8192 input data allay to obtain the result shown
in Figure 5.10. The irnage shown in Figule 5.10 replesents the magnitucle of
the courplex backscatteling coefficient.
Surface characteristics in this irnage can be roughly tlividecl into two areas
with clifferent slant r-ange: the upper half from nadil to mi