lsiOLI20160408

Robustness
As I don't have seatruth data, apart from the above speaker_harris_fig_01.png,
I used results obtained on lsiOLI_20140129 as a seatruth DTM
The result is astounding,
knowing that part of the fuzziness is caused by slight misregistration of the PAN band.
No smoothing applied

Regression
April 8th 2016 vs Jan 29th 2014
This is a test of the robustness of 4SM

ZR + 0.60m - ZC
February 4th 2016 - April 8th 2016

Discrepancies
Three specific sources of discrepancies must be considered

Cloud shadows: they cause over-estimation of retrieved depths. I could not find a way to avoid it.
Misregistration: the 30 m re-sampled PAN band is misregistrated by one pixel in both row and line. This causes fuzziness, and overestimated depths on occasion.
Variation of water optical properties: they cause local over -or under- estimation of retrieved depth

Robustness
The results are much more robust than I expected! I intend to produce
a Combined Depth raster
out of all these results.

Data
and Deglinting by NIR

TOA TCC: raw image logaritmmic enhancement	BOA TCC deglinted image logaritmmic enhancement
BOA deglinted PAN logaritmmic enhancement discoloured water: total extinction of PAN, Blue and Coastal bands	BOA deglinted Coastal logaritmmic enhancement Bad deglinting
BOA deglinted Green logaritmmic enhancement very faint signal over discoloured water	BOA deglinted Red logaritmmic enhancement poor deglinting on west side