Added the altitude to the data structures

scripts/matlab/gps/get_daily_tracks.m

-date = '20210908';
+date = '20210909';
 imdir = ['/Volumes/Extreme SSD/Backup_TReX/uav/' date '/rhodamine_patch'];
 
 flights = natsortfiles({dir([imdir '/flight*']).name});

scripts/matlab/gps/get_gps_track.m

@@ -70,6 +70,7 @@ data(i).flight = flight;
 data(i).survey = survey;
 data(i).lon  = lon;
 data(i).lat  = lat;
+data(i).alt = h;
 data(i).extent = [lonmin lonmax latmin latmax];
 data(i).time = time;