WAAS, WAAS Averaging, and code 32
Posted By jimmy cleveland on 9/26/2006 at 8:07 AM

I don't use WAAS very much, so I'm not as up to speed as I should be. Isn't WAAS better than WAAS Averaging? What is code 32?

Thanks,
Jimmy


Re: WAAS, WAAS Averaging, and code 32
Posted By J. T. Strickland on 9/26/2006 at 8:54 AM

WAAS averaging should give you a better solution, since it averages readings over several epochs, instead of one reading.
A code 32 is like a system reboot, what to do when all else fails.
terry


Re: WAAS, WAAS Averaging, and code 32
Posted By Alden Smith on 9/26/2006 at 10:13 AM

I always wondered if a PM2 would, in nav., average without a WAAS. From what I have read here it seems it will (when not moving)average. I had assumed if it was averaging it was using WAAS ??


Re: No Alden?
Posted By Lawrence Paul Lopresti on 9/26/2006 at 11:33 AM

In Navigation mode a PM2 will average whatever it gets. If it says
"Averaging" that is what it is doing, when it is "WAAS Averaging" it tells you so. In the sky view if you see a white "W" in a back box the PM2 is locked on and you should be getting WAAS averaging. If you flip screens and it is not "WAAS Averaging" move it around, and arms length circle over your head should do it, and get a new averaging started.

In New Hampshire you may not yet see WAAS.

Paul in PA
Modified By Lawrence Paul Lopresti on 9/27/2006 at 7:24 AM

Re: WAAS, WAAS Averaging, and code 32
Posted By jimmy cleveland on 9/28/2006 at 1:22 PM

I have a Magellan Meridian, and sometimes it shows WAAS, and sometimes it shows WAAS Averaging. I wondered which was better.


Jimmy
Posted By J.D. Billings on 9/28/2006 at 11:31 PM

I think you are basically confused as to what the difference between the display of "WAAS" and "WAAS AVERAGING" amounts to.

When the unit displays the "WAAS" message, the receiver is using the corrections from the WAAS satellite. At this point, the data is epoch by epoch, particularly if you are moving the unit. The only time the unit will display "WAAS AVERAGING" is when the unit is sitting static, and is properly receiving the WAAS correction signal.

As for data quality, we have found that when receiving WAAS corrections, and moving the unit to a point at which you would like to obtain the best position possible, do the following:

1. Hold the unit over the point for several seconds and watch for the "WAAS AVERAGING" note, then let the unit average for a few seconds.

2. After allowing the unit to average for a few seconds, move it just enough to lose the position lock. The reason for this, at least in my experience, is the fact that a few epochs while moving to the point initially will be included in the average due to a certain amount of latency in the units processor. If you leave these in the average, they will eventually be "lost in the noise", but it is a simple matter to move the unit a tiny bit and force averaging to start again with a fresh fix.

Averaging is generally the only way to collect a position as the unit will almost certainly be static at the time.




Re: WAAS, WAAS Averaging, and code 32
Posted By jimmy cleveland on 10/26/2006 at 10:51 PM

Thanks for the info guys. You are a great resource.

Jimmy