I'm Late For Dinner!!
My wife called me from the restaurant but my cell phone dropped the call before I got the name! Luckily I am an electrical engineer who happens to be an expert on GPS! I have taught myself to solve the system of nonlinear pseudo range equations in my head. But you pea brains would have to use the Maple worksheet below. I used the pseudo ranges from my wife's cell phone to find that the name of the restaurant is Mary Mac's Tea Room.
The link on the left describes the solution to the pseudo ranges. The right link discusses the ambiguities.