Hopefully someone from Emlid or someone that really understands this can respond please.
In ReachView, under RTK Settings, GNSS Select, Update Rate,1Hz,5Hz, 10Hz and 14Hz depending on the combination of GNSS Select of constellations chosen.
From another post of mine awhile back, I was having a problem of my displayed location and VERY slow movement in FieldGenius using Bluetooth, USB & Serial connection. i.e. it would take about 10-15 seconds for it to catch up and show my current rover location every time I moved, just terrible.
I had initially set it to 5Hz (and tried 10Hz and 14Hz) thinking the HIGHER the Hz, the faster and better update rate of the display of my rover’s movement. (kind of like the higher the frequency of a video display monitor refresh rate from lower quality 60Hz to 120Hz to 240Hz the better) Well, I changed it to 1Hz and it works flawlessly now and the movement is much better and workable in FieldGenius. Clueless why this is?
Is the fact that using a higher frequency rate such as 5Hz,10Hz or 14Hz, put more stress on the system introduce lag / delay? Therefore slow display lag when passed through to a third party software such as FieldGenius? What is strange is the ReachView app itself doesn’t show this lag in map view (which is great of course!).
Can someone please explain exactly what is going on with the Update Rate selection please? Is using a higher frequency more preferred or not? Why or why not?
+1… I think you might be onto something with the lag from too many pings vs the quality of the fix. I know we run 1hz base, 5hz rover and 5hz machine in construction. I was told to run the M+ at 14hz, but now I have the new firmware and the M+ at 5hz…
Yes. We have dozers, blades and just got a couple of Komatsu excavators. Not so worried about the excavators as they are stationary most of the time and you can only dig so fast, but the others can run 10-15mph at times. Close to drone speed. They use GPS, Glonass and Galileo.
So in a way, the machines speed are dictated by the max update rate of the rover on the machine. So if I am thinking correctly, the higher the rate the faster and shorter the delay the machine. I.e max 14Hz for Emlid and the correct gnss constellation combination of course that works for the region. I’ve seen machines that use a Robotic Total Station at very high rates in order to keep up.
So getting back to it, just weird how setting to 1 Hz, my rover moves fluidly on the display (old Trimble Nomad 900G and Surface Pro 1 both with FieldGenius9). But when set at 5Hz or more, just huge 10-15 second lag from point to point while staking.
Maybe eventually the Emlid pros can explain why this works the way it does, in terms of GNSS.
I agree. The GPS system updates at 5hz. I guess because we are feeding from an existing (proposed) surface the rate isn’t as much of a factor as collecting data. Maybe we are getting better quality data on a slower rate?
Sidenote - I will be buying FieldGenius next week when they are open. Since I can’t figure out the last piece of integrating Magnet…
I’ve never used TOPCON MAGNET Field, but watched LOTS of videos etc on it. What is the last bit your having trouble with? I think u had a post awhile back about it? Was Brent ever able to help with it as I think he’s a Topcon guy?
Ha! Speak of the devil! Here’s Brent. yes, I had it working but I really need to test again. I’m not exactly a “Topcon guy” but I do have a Topcon Robotic Total Station and I was really stoked how I could integrate these two products. I really need to test again and properly record every step.
@Brent_W, I will take a look at that. I think I have been running my rover at 5hz. Everything works great until I get a fix. I have gotten good data with a solid float and post-processing, but as soon as it goes green it won’t shoot and says waiting on the topo shot screen. Localization and other features work fine.