Yeah, something like that. Anything, really.
I know we have nightvision goggles, but whenever I use them in a nighttime mission, I don't spot any aliens I didn't already see before using them. What exactly is the effect of using them anyway, and is there a passive benefit just from wearing them?
X-Com had those movement sensors that let you see where things moved during the last mission. The description of the gravity sensor on the Alien Detection module sounds pretty much exactly like this technology, so maybe it should let you research something like this for use in ground missions.