Various water types:
each of these distinct basins has its distinct Jerlov water type
clearest         is OIB+0.7             for open Gulf waters
least clear     is Coastal 4                       under mask_4
the problem of course is that Lsw and Lw cannot be estimated properly


L71015043_04320030112 12 JAN 2003

Raw TCC	Deglinted TCC
raw ETM1                            raw ETM2 negative bottom contrast in the blue band is obvious over the Everglades and also in many of the shallow sounds very high bottom contrast in the blue band	raw ETM3                        raw  ETM4 negative bottom contrast in the blue band over the Everglades, this denotes healthy vebetation and/or "black waters" high in CDOM in the shallow sounds, we may suspect abundant seagrass and/or very dark bottoms
deglinted ETM1              deglinted ETM2  under mask 6 see profile6 deglinted ETM1 shows onlymoderate variations and decreases ~3 DNs below the water volume reflectance of the ocean deglinted ETM2 is highly variable, and remains everywhere well above the water volume reflectance of the ocean deglinted ETM3 decreases towards deep water radiance form NW towards SE	deglinted ETM3 under mask 6
Calibration for the whole image no deglinting and no smoothing of BPL pixels water type OIB+0.7 WL[green]=572 nm note that the bright pixels of mask 5 are present in the biplot of Ls[blue]vsLs[red], but they have been more strongly attenuated	Calibration under mask 10 no deglinting and no smoothing of BPL pixels water type OIB+0.7 it can be seen that shifting WL[green] from  560 to 572 nm is quite necessary for the BPL assumption to be satisfied for all pairs of bands WL[green] at_midwaveband  without shifting WL[green]: water type OIB+0.4
4SM can calibrate under any mask specified in a shapefile as illustrated below Upon modeling only pixels under specified mask are updated,  while other pixels are left unchanged
Calibration under mask 3  water type C3+0.2 WL[green]=562 nm Lsw[blue] was decreased from 61.3 to 57.3: this tends to increase computed depth over dark bottom Depth under mask 3 is reported to reach 6 feet in its southern part	Results under mask 3 image B the bottom is extremely dark in the northern part image Z mostly shows swell artifact! Deepens toward the central basin image LBnormalized clearly suggests green spectral signature all over profile3_Z           see also profile3 green spectral signature well developped in the deeper basin reaches ~1.6 m at most variations of computed depth are badly affected by the swell Modeling under mask 3 seems to make sense lacks a near Blue band in order to ascertain the extent of the decrease in water volume reflectance in the blue region for coastal waters
Calibration under mask 4 water type C4+0.0 WL[green]=583 nm Lsw[blue] was decreased from 61.3 to 58.3: this tends to increase computed depth over dark bottom Depth under mask 4 is reported to reach 6 feet	Results under mask 4 image B the bottom is extremely dark in the deeper areas image Z mostly shows swell artifact! image LBnormalized clearly suggests green spectral signatureall over, although less pronounced where bottom is brighter profile4_Z           see also profile4 green spectral signature all along reaches ~1.8 m at most variations of computed depth are badly affected by the swell Modeling under mask 4 too dark too noisy lacks a near Blue band a frustrating experience! I wish ALI had covered this area
Calibration under mask 5 water type OIII+0.0 WL[green]=578 nm could not ascertain a decrease of Lsw[blue] for lack of negative bottom contrast Depth under mask 5 is reported just to exceed 6 feet locally	Results under mask 5 image B the bottom is extremely bright in the central area image Z nicely depicts depth variations image LBnormalized clearly suggests green spectral signature is less pronounced in the central brightest area profile5_Z           see also profile5 green spectral signature all along reaches 2 m at most variations of computed depth are slightly affected by the swell Modeling under mask 5 very bright ==> noise not a problem  a nice experience
Calibration under mask 6 water type C3+0.3 WL[green]=578 nm Lsw[blue] was decreased from 61.3 to 57.8: this tends to increase computed depth over dark bottom Depth under mask 6 is reported to reach just in excess of 6 feet	Results under mask 6 image B the bottom is extremely dark image Z shows mostly depth variations caused by the swell image LBnormalized suggests green spectral signature all over profile6_Z           see also profile6 modeling is impossible where the Red band reaches the deep water radiance because K[green] and K[blue] are too close variations of computed depth are badly affected by the sewll Modeling under mask 6 too dark too noisy lacks a near Blue band a frustrating experience!   I wish ALI had covered this area
Calibration under mask 7 water type C3+0.4 WL[green]=562 nm Lsw[blue] was decreased from 61.3 to 57.3: this tends to increase computed depth over dark bottom Depth under mask 7 is reported  just to exceed 6 feet locally	Results under mask 7 image B the bottom is not too dark image Z nicely depicts the details of this drainage system, althoug the swell artifact shows up where deepest image LBnormalized suggests green spectral signature all over profile7 Z           see also profile7 depth reaches ~1.6 m, with some noticeable difference with the Coastview map though variations of computed depth are affected by the swell at depth Modeling under mask 7 quite nice, as the area is fairly shallow  and bottoms are not too dark modeling with only the green and blue bands would be impossible: this would require an orange band possibly a near blue band and a much improved SN ratio like with ALI
Calibration under mask 8 water type OIII+0.0 WL[green]=578 nm Lsw[blue] was decreased from 61.3 to 58.0: this tends to increase computed depth over dark bottom Depth under mask 8  : please note the 12 feet contour line please note the 30 feet contour line	Results under mask 8 image B image Z the shallower ridge at waypoint B is dubious image LBnormalized maps the extent and variations of the green spectral signature profile8 Z           see also profile8 ?depth  is ~1.6 m at waypoint Cwhere the Coastview map has the 12 feet contour Modeling under mask 8 quite nice, as the area is fairly shallow and bottoms are not too dark
Calibration under mask 10 perfect and straightforward calibration water type OIB+0.7 WL[green]=572 nm	Results under mask 10 image B image Z  image LBnormalized Modeling under mask 10 quite nice, although coastal waters tend to spill out from Florida Bay: this causes artifacts, quite obvious in image B
Work is not finished: it would require covering the whole imagewith contiguous masks, and modeling under each mask one after the other and some seatruth	Don't be surprised: work is not finished. Rather I want to study more ETM images