README % C. Chickadel, chickadel@apl.washington.edu - 01 May 2020


These Matlab .mat files contains thermal infrared (IR) radiometer data with filenames like:


INNERSHELF_2017Oct09_INS_radiometer.mat


The variable in the radiometer image files are:


name:                     size (examples):           description:
lat                               [125813x1 double]        latitude, ground footprint location calculated from the plane nav data 
lon                              [125813x1 double]        longitude, ground footprint location calculated from the plane nav data
tempRad                     [125813x1 double]        1 second mean (from 20 Hz data) radiometric SST brightness temperature. 
timeEpoch                [125813x1 double]        time stamp in epoch time (UTC)        
timeMatlabUTC        [125813x1 double]        time stamp in Matlab datenum (UTC)




NOTE:


1. The radiometer instrument was a Heitronics KT-15 pointing at nadir (straight down).  The KT-15 brightness temperature was not corrected for emissivity angle due to plane orientation or reflected background (sky) radiance.


2. 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.