4SM OLI Hyperion La parguera, Puerto Rico

Please refer to

sensor	acquired		processed
HYPERION	20020815		feb 2014
HYPERION	20030113		feb 2014
HICO	20130926	****	april 2016
LANDSAT8	20130618		feb 2014
LANDSAT8	20130805	*****LUT	mar 2021
LANDSAT8	20131227	**	may 2016
LANDSAT8	20151030	***	may 2016

LIDAR DTM data reveals that this is a success for 4SM, although vast expanses are affected by turbid waters it demonstrates that no need for field data, although the LIDAR data helped me a lot in deciphering this case the generic optical calibration of the PAN band works fine see Caicos Bank and Andros Island it can be applied to the reflectance signature of the average coral reef sand : this is most desirable: no need for land areas in the image anymore! the PAN band is not that noisy, after all good depth retrievals down to 25 m, subject to minor adjustment of the deep water radiance using Kblue/Kgreen with wavelengths WLblue and WLgreen at mid-waveband so that: no need for field data: CoefZ=1.0
Thanks to the DTM, I can decide which operational practices in 4SM should be ruled out, which are confirmed
These scenes are NOT worthy of shallow water work by 4SM, apart from isolated ROIs.
Another nice case for "semi-analytical" methods to show their supremacy: see DigitalGlobe and EOMAP 4SMLUT: a final challenge to map the spatial variations of waters optical properties
But I note that Hernandez's 2016 PhD work was done in 2014-2016 at UPRM, home of Prof. Roy Armstrong and Dr James Goodman resorted to not so "analytical" or physical ways, in favor of mathematical ways required a select/suitable formal atmospheric correction required/used an existing LIDAR coverage for its calibration using a simple Blue/Green band ratio (not using Coastal?) focused precisely, and commented only, on the very area where 4SM obtained its best results: ROI5 produced a "depth-invariant" index of bottom brightness in place of a real spectral water column correction and finaly did not use the Panchromatic band of WV2 imagery

With a DTM at hand, I can decide
which operational practices in 4SM should be ruled out
and which are worth investigating further
I've done my best to try and make sense of these images under 4SM,
using Landsat 8 and Hyperion images: NO WAY!
Looks like there is a curse on La Parguera!

with NOAA's LIDAR seatruth dataset PR_BATHY_4M_Mean_NNresample

This scene is marred by heterogeneous waters, under the dual influence of
coastal pollution from lands masses, rivers and cities
and west-bound flow of very clear oceanic waters from the Sargasso Sea.

From "Geologic maps of the southwestern Puerto Rico Parguera to Guanica insular shelf"
Jack Morelock, Elizabeth A. Winget, and Carlos Goenaga