I have been researching and brainstorming (drizzling?), I see that the test nav message that has been broadcasting on L5 is set to "unhealthy".
I was wondering if there is any way to set the Trimble system to use the signal regardless of the unhealthy status? Am currently only interested for testing purposes.
We have a bevy of R10s, and as far as I can tell, the L2C signal currently doesn't provide any noticeable benefit. If anything I think it actually degrades the performance of the "HD Surveying" engine compared to our R8 model 3s. My crews have all said that in practice they see no benefit from the R10s technical difference, and from my own experience I am inclined to agree. If anything with the loss of the whole fix/float system it mostly only seems to lie more and overstate accuracy. At least in the old days you knew to suspect and check/verify if the fix was iffy.
I thought the navigation signal was for the position of the satellite, as such all signals, L1, L2 and L5 should come from the same location in space.
I have no L5 capable receivers so I am not up to date on any of the specifics.
Paul in PA
R8 model 3 receivers also track L2C, it's a setting in the survey style regardless of whether it's an R8 or R10, and it has to be set the same on the base and rover. In theory the L2C signal enables the processor to better reconstruct the incoming L2 carrier phase, which improves RTK significantly. I've been using it for ten years.
My experience is that the error estimates from the R10 are much more accurate than the R8, especially in challenging conditions.
You might be able to force L5 - I haven't tried it - but there's no benefit until there are enough satellites and they're set healthy.
Lee D, post: 358001, member: 7971 wrote: R8 model 3 receivers also track L2C, it's a setting in the survey style regardless of whether it's an R8 or R10, and it has to be set the same on the base and rover. In theory the L2C signal enables the processor to better reconstruct the incoming L2 carrier phase, which improves RTK significantly. I've been using it for ten years.
My experience is that the error estimates from the R10 are much more accurate than the R8, especially in challenging conditions.
You might be able to force L5 - I haven't tried it - but there's no benefit until there are enough satellites and they're set healthy.
Given the way some rave about the R10 I'm inclined to believe we must have some settings wrong somewhere. I say that with some doubt, though, as we have been using Trimble gear, and their GPS/GNSS exclusively, for over ten years now. We are pretty knowledgeable about this/that checkbox. What I think may be off, though, are some internal settings. I have a couple of guys that are even well versed in configuring them with their laptops, though. I say they may be configured incorrectly somehow because some setting or other is almost always wrong when they are delivered. More than a couple of times the dealer hasn't "installed the channels" for the radio yet. This has become the first thing we check.
Using planning software I see several times through the week that there are enough L5 SVs to run checks, and/or plan adverse condition work - if I could force the receiver to use the signal (if it proves valid...).
I haven't done it yet, but the first thing I'd do is log L5 data to a static file, convert to RINEX, and take a look at it. I don't see how it could hurt to use it for RTK - if the satellite is set unhealthy the receiver will see that. But I did have some issues with L2C when it was new, I remember needing to leave it off for a long time. So I'm holding off on L5 until I hear that it's healthy and stable.
Some of our crews didn't like the R10 at first because the error estimates are more realistic - they were used to the R8 lying to them lol. But our overall experience has been that it's a better box.
Here's a link to help out any other folks interested:
GPS.gov: New Civil Signals
