amisr14_10pos_20210716.mat is a Matlab file with the following variables:

lts, vector with local times
ranges, vector with range values
snrmat, 3D matrix with SNR values for the 10 beams, beam position x lts x ranges
utcvec, vector with universal times
azimuthList, list of the 10 azimuth angles        
elevationList, list of the 10 elevation angles