I have read somewhere that a float solution on PM 3's is sub meter or sub foot. I'm assuming that is with WAAS sat(s) visible. Can anyone confirm the accuracy for a float rtk solution with Promark 3's?
thanks,
terry

Terry,
I was trying to get a shot on a section corner last week and could not get a fix, after about 15 minutes I logged the shot with a float of 0.6'.

I'm going back this coming week and will do a static survey on all the located section corners, I will post back the results on this corner.

Dale

I don't think you can have any confidence in float solutions - like in the trees - some may be close and some nowhere near.

At best it's a guess - the degree of sky obscuration and number of sats and geometry is usually is a very approximate indicator as to expectations, but float is still float.

I've followed up several and have no confidence in the actual numbers generated by float, but still record some now and then as an indicator of a field feature, or some very rough points to begin clearing for a road - to be followed up by better points as soon as the sky begins to open up.

Ken

JT,
I agree, a FLOAT is a gambling man's game... But, my personal experience w/ PM3's and a FLOAT has been sub-meter most of the time, which is the unit spec regardless using SBAS w/o RTK data at all, right? A few times it was sub-foot. I would say sub-foot FLOAT shots can be assumed with several minutes of occurpation time using a bi-pod, low PDOP, and 6+ healthy birds.

That being said, I never go to the bank on a FLOAT..

Thanks, everyone,
I also would not count on a float solution. However, there are times that sub meter is good enough. With other equipment, a float solution could be several feet. If indeed the PM 3 float was ALWAYS sub-meter, it could be significant, at least for some applications.
terry

if you're near or in even light trees it could be 10 feet.
Ken