anyone using the above? I have been out for the past week doing the above and did not have the slightest glitch. This might upset JF but the unit & software worked perfectly throughout. I could not be happier with my investment. One comment is that I need an extra battery because my day is about 10hrs from on to off, but with the external charger, extra battery and the cig lighter accessory with car battery all is taken care of.

Yes, I use the PM3's in Mobile Mapping mode almost every day. I set up one of the units over a control point and use the other as a rover unit. It has worked quite well, except for the two times I had the wrong date issue. I'm trying to wait awhile after first turning the unit on, before starting Mobile Mapping to counteract this.

I have also had some problems getting enough battery time. I switched the two units and discovered that the one I had been using as the base unit did much better than the former rover unit. Even though it's a pain the butt, you can also switch units and start a new session, when the rover's battery starts getting low. In my experience, the base unit uses less than half as much energy as the rover, so it should have plenty of battery left.

Dave and Ron, are you in the wide open? Mine works fine with no obstruction, but with any obstructions at all, it is totally unreliable.Thanks, Dave

DL - generally I am out in the open, with the exception of rubber tree canopy and if I take +/-250 points in a day I would only have to wait for sats on 1 or 2 occassions to get a fix. I am on the equator so no.of sats & pdop is almost never an issue.
RW - I do the post processing as well, the battery on the rover always goes down first, I suppose because of screen lighting. This is why I have a spare in the field and run tha base off external power. Also I think you have found the solution of the clock by waiting for fix before opening up MM or survey.

DL - I'm almost always under moderate to heavy canopy conditions. Generally speaking, the unit does extremely well and gets decent accuracy. The exception to the above is during times of lousy constellation numbers and/or geometry, which I described in a previous post. There are brief times during the day, when I can only get 5 or 6 sats out in the open, so obviously those are not the times when you want to be in the woods with GPS.

DM - I might try the spare battery. Do you just stop the current session, while changing the batteries, and then reopen it afterwards? That would beat walking back to the base station and switching units.

RW- yes, I have done this in MM ok.I shut down the unit,replaced the battery, started MM again and opened existing job. A good feature with MM is that it appends the second session to the first and comes out just as we want it after the download. In Survey it would require opening up another job [or file].