README % C. Chickadel, chickadel@apl.washington.edu - 08 May 2018

These Matlab .mat files contains visible camera (EO) data mosaics, and radiometer data from the 2017 Inner Shelf overflights. Filenames are of the form:

INNERSHELF_2017Oct11_EO_mosaicked.mat

and/or

INNERSHELF_2017Oct11_EO_mosaicked_focus.mat

The differences inn the files are in the region mapped. The "focus" files are tailored to fit the specific region surveyed while the others are mapped to the same region spanning the whole Inner Shelf domain.

The variables in the EO image files are:

name		size (example)		description
----------------------------------------------------------------
  SRGB      	1701x901x3x19 		unscaled EO image data
  NS        	1701x901x19   		EO image scale factor (ignore)
  Xs        	1701x901      		easting grid coordinates (MGRS-UTM, meters)
  Ys        	1701x901      		northing grid coordinates (MGRS-UTM, meters)
  time      	   1x19       		time in epoch for each EO image

NOTE:

1. epoch time is the seconds since 1970 Jan 1 0000 UTC.  Use the functions epoch2Matlab.m and matlab2Epoch.m to convert to and from Matlab's datenum.

2. there are some empty EO maps due to the nature of the processing, please ignore.

3. In an attempt to minimize sun glint, bright image pixels have been removed. Because many images overlap in the construction of the mosaic this usually results in a non glinty ocean surface.  However, portions of the land (bright sand, for example) are sometimes masked out.


% example Matlab script to display the infrared (IR) temperature maps
for j = 1:length(time)
  clf
  image(Xs(1,:)/1000,Ys(:,1)/1000,SRGB(:,:,:,j))
  axis image xy
  title(datestr(epoch2Matlab(time(j))))
  xlabel('E [km]')
  ylabel('N [km]')
  axis image xy
  pause
end