I took an undergrad course in GPS at Colorado School of Mines and enjoyed it immensely. We didn't work on the radio level (other than learning about the 2-freq

I took an undergrad course in GPS at Colorado School of Mines and enjoyed it immensely. We didn't work on the radio level (other than learning about the 2-frequency ionosphere delay measurement as a calculation input), but did the rest of the stack above that including working out programs to derive position from given data input. I was a civil engineer but I think it's a great cross-discipline subject for a lot of fields.