Activity Feed › Discussion Forums › Strictly Surveying › is Trimble R12 a better upgrade?
- Posted by: @bstrand
I think the IMU is great, but that canopy busting stuff they talk about seems extremely hit or miss (mostly miss). I spent all week working in leave-less trees and I couldn’t get very good accuracy anywhere, even in the lightly wooded areas.
You are turning the IMU off for under-canopy shots, right?
“…people will come to love their oppression, to adore the technologies that undo their capacities to think.” -Neil Postman I wasn’t, no. But the IMU on the receiver I’m using seemed to have stopped working recently anyway. I spent some time yesterday trying to do a calibration on it but it didn’t seem to work. Anyway, are you suggesting the IMU causes problems in canopy? if so, this is the first I’ve heard of it.
I also noticed that if IMU of the R12i is on under heavy canopy measurements are not so precise. Also check it with total station measurements!
- Posted by: @bstrand
I wasn’t, no. But the IMU on the receiver I’m using seemed to have stopped working recently anyway. I spent some time yesterday trying to do a calibration on it but it didn’t seem to work. Anyway, are you suggesting the IMU causes problems in canopy? if so, this is the first I’ve heard of it.
Posted by: @johnymalI also noticed that if IMU of the R12i is on under heavy canopy measurements are not so precise. Also check it with total station measurements!
IMUs, by definition, require some movement to maintain orientation/heading, but the GNSS antenna solution, by definition, will not be able to converge unless it is stationary. There’s a trade-off when working with the IMU enabled.
The R12i documentation specifically recommends that IMU compensation be disabled when in difficult environments:
“…people will come to love their oppression, to adore the technologies that undo their capacities to think.” -Neil Postman
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