TCC raw linear enhancement
Hamelin Pool
is located at the SE of Shark Bay in western Australia

 

TCC deglinted histeq enhancement



 
 
Blue band deglinted

 
* There is abundant negative bottom contrast in band ETM_1
* Not easy to settle for a Lsw
blue   value



 

Green band deglinted

 
* A body of turbid waters is seen pouring out of SharkBay

* Red band deglinted bottom detection is only observed in a ~300 m wide strip along the water line: the bottom of Hamelin Pool shows no bottom detection in the Red band 

 
 
computed depth Z

 



 
  • Modeling in the salt ponds is not appropriate, as deep water radiance may not be estimated
  • Freycinet Basin appears to be extremely complex, while Hamelin Pool and Lharidon Basin are quite simple
  • We obtain a maximum computed depth ~=7.5 m in Hamelin Pool where the bottom is brightest, whereas hydrography shows a MaxDepth ~=8 m (though at another location!)
  • Tide height: the tide height relative to the hydrographic data is not known. The offset in Fig. 7 might simply be caused by the M=0 factor in Bierwirth's method, instead of giving a measure of the tide height.
 
Final Z= CoefZ*Computed Z + TideHeight
where TideHeight and CoefZ
may only be obtained using seatruth 





 

TCC of water column corrected bottom reflectance

 
* No enhancement: radiances are BOA: this is a "low tide view"
* The dark diatom ooze area is well visible in the southern part of Hamelin Pool

 

average bottom reflectance B

 
* The processing of darkest areas required the introduction of special conditions in 4SM code
* These areas at a depth of 2-5 m have a quasi-null reflectance in the blue band: depth results are all the more questionable

 

Calibration diagram
for the whole image

Very clear waters
  • Waters appear to be stratified
    • water type ~ OII  +0.34 0-5 m
    • water type ~ OIB+0.69 at depth

 


 

Calibration diagram
for HamelinPool/LharidonBasin

Very clear waters
  • Waters appear to be stratified at Hamelin Pool
  • water type ~OII+0.49 0-4 m
  • water type ~ OII+0.27 at depth
  • Waters in Hamelin Pool are hypersaline
  • though fresher waters seem to be sligthly denser/cooler/clearer than hypersaline waters above
 
 
nice -20 4SM.4.01 -Process/14_JAN_2011 -OriginNPA
-DB/L71115078_07820000812/31_1S_0_0/4_1/5541_5297/662.745000_-2796.315000/1_1
-Mis/Australia/SharkBay/Landsat/ETM/USGS/UTM_49_008/0.030_-0.030/12_AUG_2000
-LS/0255.0/255.0/255.0/255.0
-WLM/513.9/600.7/692.0/898.0
-WLm/441.3/519.4/630.6/771.6
-cWL/0.450/0.650/0.350/0.500
-M/@000001/00002/00003/00004
-CP/101.87/073.26/022.96/010.00_mask_2
-CP/075.71/036.47/017.16/010.00_10.00m
-CP/066.89/029.63/017.13/010.00_22.00m
-dLsw004.0/001.0/00000/00000
-Lm/0001.0/000.2/002.5/255.0
-LsM/155.5/175.4/248.8/210.3
-Lsw/51.85/26.86/17.13/10.00
-Lw/0006.5/001.5/000.0/000.0_1.1 .3 06
-KK1_2_0.4456/Knir4.500/Bm400_BG500_GR600_RN700 /mask_2
-Z/MSL0.00/zplus/cSL1.18/ZMax0.00/cdZ1.00/PAN_1_4/sIG_0w0/N_1/cZ1.000 1
-B/tclNe5.00/LBref200_100/Bmin0/cLM1 .1
-deglint/vRbaD/DegTol1.00/F1/L4/GlintM15.0/FN/mDEGLINT1
-extract/v/rawBDH/NIRband4/NIRmax5.0/mBPL2/mSOIL21/FullBDH
-calibrate/v/BDSNpZG/BDh_12_13_14
-Model /mask_2 -Smooth/5/D/Smart+
nice -20 4SM.4.01 -Process/14_JAN_2011 -OriginNPA
-DB/L71115078_07820000812/31_1S_0_0/4_1/5541_5297/662.745000_-2796.315000/1_1
-Mis/Australia/SharkBay/Landsat/ETM/USGS/UTM_49_008/0.030_-0.030/12_AUG_2000
-LS/0255.0/255.0/255.0/255.0
-WLM/513.9/600.7/692.0/898.0
-WLm/441.3/519.4/630.6/771.6
-cWL/0.450/0.650/0.350/0.500
-M/@000001/00002/00003/00004
-CP/101.87/073.26/022.96/010.00_mask_2
-CP/075.71/036.47/017.16/010.00_10.00m
-CP/066.89/029.63/017.13/010.00_22.00m
-dLsw004.0/001.0/00000/00000
-Lm/0001.0/000.2/002.5/255.0
-LsM/155.5/175.4/248.8/210.3
-Lsw/51.85/26.86/17.13/10.00
-Lw/0006.5/001.5/000.0/000.0_1.1 .3 06
-KK1_2_0.4456/Knir4.500/Bm400_BG500_GR600_RN700 /mask_2
-Z/MSL0.00/zplus/cSL1.18/ZMax0.00/cdZ1.00/PAN_1_4/sIG_0w0/N_1/cZ1.000 1
-B/tclNe5.00/LBref200_100/Bmin0/cLM1 .1
-deglint/vRbaD/DegTol1.00/F1/L4/GlintM15.0/FN/mDEGLINT1
-extract/v/rawBDH/NIRband4/NIRmax5.0/mBPL2/mSOIL21/FullBDH
-calibrate/v/BDSNpZG/BDh_12_13_14
-Model /mask_2 -Smooth/5/D/Smart+





 



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