Got to do some temperature measurements at a number of sites. Depending on the site, I went between 6cm and 18cm deep. The general trend is that during cold morning hours/in the shades the temperatures are increasing with increasing depth and at sites with strong direct sunlight the temperatures are decreasing with increasing depth. Would have loved to do more measurements, but sunset called us back. Regarding the feasibility of this type of measurement for FMARS: No problem at all.