What potable gps to order tonight

OLYLEN wrote:
No as I have about 32 years GPS experience and you are good at quotes but it appears know little of what you talk about. Until retiring I was a geodetic Eng. And had as part of my staff the NGS advisor. Also installed the super mirror ground control WITH GPS a one mile by one mile right angle to a tolerance of 5mm. You a partially correct on the WAAS system as I installed a couple of the sights control. It is actually a time correction transmitted from a ground sight with know coordinates. I can go on and on with projects but that is irrelevant. And how did you grade you accuracy tests? Over a know point so you could get real RMS values? OR yup middle of a street from a digitized map that had an original accuracy in many feet?
OK I quit!

LEN

i understand WAAS and how it works and know plenty of what I talk about. Obviously you have more experience with the hardware (sounds fun). The point is, and without boring others that WAAS comes off of commercial satellites and there needs to be a reasonable path or it ain't gonna work, and you should know that as well. That makes WAAS questionable in any dash mounted receiver.

I don't need your kind of accuracy and for the purposes of this thread a vehicle GPS doesn't need anywhere near the resolution either of us do. When I do an FCC ASR, it first goes to the FAA who checks the work by hand against their maps and I've never had one come back at me. Im locating towers, you're locating each leg. I don't need that kind of resolution nor can I make it. These days GE is as good as my 7.5 min maps for what I do.

Either way, none of this has to do with consumer GPS and I still say Apples to Apples there is no difference in performance between a standalone and "smartphone" regardless of WAAS, GLONASS, or anything else coming up.