Looks like they've been out for a little over a month. How are they working?
The letters on Javad's site don't really disclose a whole lot. Mostly I guess I want to know the same thing as most people, how well do they perform under canopy?
They work in a well, 30' deep!
🙂
Ok, I'm waiting too!
Nate
Using NYRTN. In the real dense mixed conifer/hardwood where I can't really see sky above, I'm getting standalone +-10' and float +-5' (although hrms claims 0.20 or so) but we know float is not the same as fixed. If the canopy clear a bit and can see sky through holes here and there I'm getting fixed with hrms of about 0.15' that is actually +-0.15' (all as compared to conventional equipment positions while staking a line through the woods). Course it depends on geometry at the time and cloud cover, rain, etc.. Still, if I posted pictures and orientation of a couple places I had fixed solution I'd probably be accused of photo shopping it. So, pleasantly surprised so far. Had not thought GPS would ever be very useful in the areas I routinely need to measure, and looks like it will be. Still limitations of course (we don't have cell coverage in many areas for one thing).
Have not tried the well yet:)
Awesome, most of the area I work in is ~75% canopy
Not to hijack your thread but how are the radios working out for those using them? What kind of range are you getting?
Corey
I took a few pictures for you guys of the location of a pin in the woods that I was able to get a fix yesterday. It was directly under a large tree. There were a few areas of open vissible sky and that seems to be all the LS needed. I tried resetting the RTK engines a couple times and the LS only needed a few minutes to reacquire a fix.
I stored 3 points with 60 seconds of epochs each. The maximum spread between the 3 points was 0.07' horizontal and 0.27' vertical.
As for the range of the radio, I tested that too. The 1W UHF radio seemed reliable out to about 4000'. This was overly fairly flat terrain but with many houses and trees between the base and rover. I managed to get a fix close to 5000' away for a few seconds. I had the radio mounted about 5' high on a tripod.
