The children returned to Fairbanks. They went right away to talk to the scientists at ASF.

Scientist:
What you saw was a corner reflector that we set up on purpose in Delta Junction. We know the precise location of the corner reflector. This information is very helpful.

The corner reflector makes a bright spot on the SAR image which we can clearly see. Now we know our exact location on the image.

You can make your own model of a corner reflector and see how it works.