The report is most impressive, but somewhat disconcerting. Inspite of the facts it shows that no accuracies were ever affected - none - the laundry list of "interferences" is exactly enough to justify the pay of the folks who did the work.
The bottom line is that if all those recommendations are implimented, the cost, weight and testing requirements for gps receivers would all rise, due in no small part to the fact that nothing was found. Nothing.