Glint regressions based on band 8
-
Again, it would seem that this image is not raw from data provider: "the band images after subtracting an estimate of the deep water upwelling radiance"??
-
Pixels at Zero cause a bad distortion of the glint regression: they MUST be bypassed
|
Glint regressions based on band 7
|
BiDim histograms over deep waters
band 8 is well correlated with bands 6, 4 and 1
|
BiDim histograms over deep waters
band 7 is well correlated with bands 5, 3 and 2
|
3 vs 8 2 vs 8
|

5 vs 8 4 vs 8
1 vs 8 |
2 vs 7 1 vs 7
|
4 vs 7 3 vs 7
A weird pattern of interband correlations is observed:
-
NIR band 8 is well correlated with bands 6, 4 and 1
-
NIR band 7 is well correlated with bands 5 , 3 and 2
-
this must be accounted for to improve deglinting
|
|
|

-
Glint in bands 7 and 8 are offset
-
Lowest radiance goes down to zero in raw data
-
I had to offset them a bit, as ZERO is NODATA by default!
|
|

bands 2, 3, 5 and 7
-
Note the residues of glint in deglinted data in spite of plain strong smoothing and of smart deglinting
|

bands 1, 4, 6 and 8
-
See that the glint regressions yield suitable estimation of spectral deep water radiances:
-
-Lsw/044.7/029.3/010.6/009.3/009.5/000.0/000.1/000.1
|