Fakarava atoll, French Polynesia
work done in 2014-2016



Operational 2K: problem solved
 
 
 
 
HYPERION 3_APR_2011

 

FCC

TCC

fakaravaHYP_20110403_24_21_11_4
Blue=band 4
Green=band 11
Observed K4/K11=0.500

fakaravaHYP_20110403_24_22_12_3

fakaravaHYP_20110403_24_22_13_2

fakaravaHYP_20110403_23_18_14_1

fakaravaHYP_20110403_25_21_11_4

all bands in the green-red bands
are aggregated to create
a synthetic PAN channel
which is placed in band 25


For the Blue vs PAN linearized plot,
i.e. X4 vs X25,
isobaths are drawn at a 1 m step

Modeling shall use the PAN solution (grey)
assisted by the Green solution
see image WZ

Observed Kblue/Kgreen=0.500
This yields an interpolated water type
O1B + 0.080
for this image,
by use of Jerlov's classification
of optical marine water types
,
with Kblue=0.073 m-1 for band 4
and
Kgreen=0.145 m-1 for band 11
All other Kx values
are computed by application
of the ratios Kblue/Kand Kgreen/Kx
observed in the image.


 

Z in cm
Retrieved depths probably underestimated
where bottom brightness is very dark

image B
Very dark bottoms are most dubious
Possibly caused by cyanobacterial plancton


 


HYPERION  21_SEP_2011

FCC

TCC

fakaravaHYP_20110921_24_21_11_4
Blue=band 4
Green=band 11
Observed K4/K11=0.590

fakaravaHYP_20110921_24_22_12_3

fakaravaHYP_20110921_24_22_13_2

fakaravaHYP_20110921_23_18_14_1

fakaravaHYP_20110921_25_21_11_4

all bands in the green-red bands
are aggregated to create
a synthetic PAN channel
which is placed in band 25


For the Blue vs PAN linearized plot,
i.e. X4 vs X25,
isobaths are drawn at a 1 m step

Modeling shall use the PAN solution
in the 0-29 depth range

Observed Kblue/Kgreen=0.590
This yields an interpolated water type
O1B + 0.49
for this image,
by use of Jerlov's classification
of optical marine water types
,
with Kblue=0.093 m-1 for band 4
and
Kgreen=0.157 m-1 for band 11
All other Kx values
are computed by application
of the ratios Kblue/Kand Kgreen/Kx
observed in the image:
Kx=(Kblue/Kx)/(Kgreen/Kx)


 

 



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