Interesting object on Ascension Island

I saw Ascension Island mentioned on the BBC News website today. Having recently gained a great interest in Geology and Earth Sciences, I thought I would have a look using the satellite view in Google Maps. A lot of the imagery of the island is ‘redacted’, I assume because there is an air base there. But I saw these objects and am really not sure what they are. What do you think? I am probably wrong, but it looks like there is a vehicle parked on each one. If so then it would suggest there are personnel at each site. There is another further north if you zoom out.

It certainly looks like a place I would love to visit, but I imagine it is very hot there. I gather it is very difficult to get to…