Spoof Me Not Anti-GPS Spoofing Technique

As a brief follow up to my Was GPS spoofing used to bring down a drone? entry, I wanted to point out an article in the December 2011 issue of GPS World Magazine, on how one of the ways to mitigate spoofing:

Low-Complexity Spoofing Mitigation by Saeed Daneshmand, Ali Jafarnia-Jahromi, Ali Broumandan, Gérard Lachapelle.