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scene LC80340432017319LGN00 November 15th 2017

Data and Deglinting

TOA TCC: raw image
logarithmic enhancement

TOA TCC deglinted image
logarithmic enhancement
Glint regressions using SWIR1

R2 values are fairly high
15 m resampling
 does not increase noise
 
Location of Profile_RED
backdrop is a TCC of deglinted data

 

 


Optical calibration for the whole image

Calibration diagram
for the whole image
for bands Blue, Green, Red and NIR

Calibration diagram
for the whole image
for bands Blue, Green, PAN, NIR
CoefKPan=1.05
  • KBLUE/KGREEN~=0.65
    • Jerlov water type OII
    • nice linear BPL line: denotes homogeneous brightest bottom in homogeneous waters

This calibration suits
both sides of Espiritu Santo Island
   

Calibration for bands Blue, Green, PAN, NIR
for SanLorenzo Channel , under mask_3
The SL Channel warrants
a specific calibration
of water optical properties
  • 0-4m   water type Coastal_1
    • Kblue/Kgreen~=0.95
  • 4-30m  water type OII+0.3
    • Kblue/Kgreen~=0.75



Ready for modeling

True Color Composite
of BOAWCC radiances scaled 0-250
  • B=Coastal band        in channel 34
  • G=Green  band         in channel 35
  • R=Blue    band         in channel 36
Greenery soon after the monsoon

Retrieved depth
see legend


 
Maximum BOAWCC reflectance (0-1)
for this scene -RM/0.134/0.174/0.232/0.263/0.334/0.450/0.431
To convert BOAWCC radiances
into calibrated reflectances
CoastalRefectance=CoastalBOAWCC*0.134/250
BlueRefectance    =    BlueBOAWCC*0.174/250
GreenRefectance  =  GreenBOAWCC*0.232/250
Maximum shallow bottom reflectance (0-1)
for coral sands
-RM/0.310/0.380/0.440/0.550/0.560/0.670/0.700

Coral sand is approx twice brighter
than brightest sands in this scene.

Average bottom brightness
see legend for image B
 
15 m GSD, smart-smoothed
  • not_PANsharpened: sharpening becomes redundant/pointless, thanks to:
    • improved co-registration of the PANchromatic band with the MULTI bands (might still be improved further)
    • combined with 15 m resampling of MULTI bands to match the PANchro GSD
  • smart-smoothing then becomes desirable/necessary


 



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