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

C-l¡ancl SAR irnagery ovel this alea is fourìcl to Lowman [67].
This stucly is concentratecl specifically on lineaments in the Nor.th Range
such as noltheast trencling fractures, nortlì of northwest tr.encling faults, ancl
west of roltlìwest tlending dyhes. Some selecteil geological linear.nents in
the North Range, tlansfelred fÌom a published geological rnap (Ontar.io Geological
Sulvey Map 2491, Pye et al. [87]), aLe superimposed or the airl¡olne
SAR clata in Figure 6.7.
The ailborne SAR image (Figure 6.5) geler.ally depicts surface geological
cletails much better than the ÐRS-1 SAR irnage (Figure 6.6). Airl¡olne C-
SAR image is specially effective in imaging tlie intelior of the Sudbur.y Basin
where there is relatively low relief i'egiol. Although the airborne SAR data
provicles detailed structures better than the trRS-1 SAR data, the north to
northrvest trencling lineal features ale poorly imaged in the ailbor.lie SAR
imagely clue to the flight clilection (about 70'1fE). Conversely, the glourrcl
tlack of the ERS-1 platform is about 20o ,gW , which results in better irnaging
o{ nortli to northrvest tlencling geologic structules, but uorthrvest to eastrvest
tlencling clykes are lia'-cll¡' visible. TIle look directiol effects ale rnost conspicuous
ir the North Range of Sudbury Basil (nolthwest quadrangle of the
irnages).
The Radon tlansfolrns of the ailboure SAR and ÐRS-1 SAR data (Figule
6.5 and 6.6) ale plottecl using glay level in Figule 6.8 and 6.9, r'espectively.
These Raclor tlansform ale obtained after the image cligital numbe'- (DN)
value (from 0 to 255) is rescaled into (-1.0, 1.0). In Figure 6.8 and 6.9, dalk
stripes having positive slo¡res ale seen, The relationship betrveen a poilt
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