How do you find a buried city in a vast landscape? Finding it randomly would be the equivalent of locating a needle in a haystack, blindfolded, wearing baseball mitts.
When people initially think of the term 'space archaeologist,' they think, 'Oh, it's someone who uses satellites to look for alien settlements on Mars or in outer space,' but the opposite is true - we're actually looking for evidence of past human life on planet earth.
When I was a child growing up in Maine, one of my favorite things to do was to look for sand dollars on the seashores of Maine, because my parents told me it would bring me luck. But you know, these shells, they're hard to find. They're covered in sand. They're difficult to see.
Archaeologists gave the military the idea to use aerial photographs for spying and field survey. We are fortunate that the spatial and spectral resolutions of the imagery available to us are so broadly useful for archaeology.
If you find a series of linear shapes in the same alignment as known archaeological features, and they match excavated examples, you still need to excavate to confirm, but you can be fairly sure that the imagery is accurate.
I've found numerous things - settlements, temples, possible pyramids, forts, roads - the list goes on and on. I'm not as interested in the discoveries as the types of questions they help us formulate.
If you really want to be a good archaeologist, you have to understand ancient DNA; you have to understand chemical analysis to figure out the composition of ancient pots. You have to be able to study human remains. You need to be able to do computer processing and, in some cases, computer programming.