This image shows an AVTIS scan of the whole
crater, which happened to be taken on a particularly sunny
day on the volcano. Most days the volcano is covered in cloud
and you can't see a thing! Now imagine that you live under
the volcano and you want to keep an eye on what is happening.
Using the mm-wave radar, you can make a 3D map of the volcano
on one day and then come back on another day to see if anything
has changed. That's exactly what we did with AVTIS and when
we came back ten days later the lava dome had grown by quite
a bit…