Landsat 5073x5123 pixels TM_20090110
at Geraldton, Western Australia

back to the Geraldton page
 
 
 

cWL[green] seems to depend on the path radiance
islands = lower path radiance ==>
cWL[green] = 0.58
coast    = higher path radiance ==> cWL[green] = 0.45
geraldton_TM_20090110_coast_PlotZZ
cWL[green]=0.45 is good for the coast
 

cWL[green]=0.58 is bad for the coast
 
geraldton_TM_20090110_islands_profile_purple_PlotZ23_badWL
PlotZ23 along the purple profile
cWL[green]=0.45 is bad for the islands

 
geraldton_TM_20090110_islands_profile_purple_PlotZ23
PlotZ23 along the purple profile
cWL[green]=0.58 is good for the islands
 
 

Water column corrected image, TCC
  • Results along the coast are probably artifact , except in the southernmost part
  • Negative bottom contrast was enabled in order to get results in the southernmost part:
    • this entails fancy depth results and ~null bottom brightness where negative bottom contrast is not substantiated by even a faint  bottom detection in the green band: this has been filtered out
Computed depth
  • Results along the coast are probably artifact , except in the southernmost part
  • Negative bottom contrast was enabled in order to get results in the southernmost part:
    • this entails fancy depth results and ~null bottom brightness where negative bottom contrast is not substantiated by even a faint  bottom detection in the green band: this has been filtered out

Normalized bottom reflectance, TCC

Computed depth

Deglinted TCC
 

Water column corrected TCC
 a "low-tide view"

Computed depth
Note shoaling sand dunes/spits

Average bottom brightness
Note that everything is very dark down there



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