csv files are:
datetime, id, long, lat, alt, temp, batV, X, Y, Z, moved-dist
computed from the posts file.

tracker 19: first onto breidamerkurjokull
tracker 21: uav-placed onto breidamerkurjokull
tracker 20: tracker on Fjallsjokull
tracker 22: uav-placed rover on Fjalls

posts.txt is raw json uploads
base100 is breidamerkurjokull
base101 is Fjalls

Altitudes are Geod so to get ASL you need to add:
19: 67.1145
20: 66.8183
21: 67.1173
22: 66.8714