Sounds like pretty good proof to me.
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Wonder if our tree cover is different to yours and affects signal differently? Could never work out why our pair of LS's never seemed to match up with what we saw on Javad forums.
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Our pine forests are GNSS no go (also radiata pine eats rtk signal, lucky if you get 500m when on a farm it's more like 5km) and the native bush not much better.
Pine
Native
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Yep can always have some great results that beat the product spec but the spec sheets state (Leica/Trimble at least) that the IMU adds additional uncertainty to the standard rtk 8mm + 1ppm.?ÿ Also those values are only 68% confidence so I double them which gets closer to the 95% level.
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Once you've done it a hundred times and ninety five have the same precision I'd be impressed.
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Everyone's boundary work will have a different precision requirement so was more making the point it adds error to standard GNSS obs (Assuming your gear is correctly adjusted, not always a safe bet with some crews. If your pole bubble not checked much it may be an improvement!).
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For the record if I can afford it next time I buy I certainly want the IMU rover, obviously no point getting one at the base unless you split them as network rovers.
A javad shot is NOT the same as a shot from any other brand.
It is a large pile of sequences, and resets, that flushes out the bad data. And, with the good data, gives you a pretty good estimate of its tolerances, or hundredths of slop.
Nate
I'm not sure if your missing the part in my posts where I say I have used the Javad LS?
I am familiar with their theory just found in our practice they did not work as well as you guys state side seem to get out of them.
Local guy who recently retired and I scored a bunch of stuff off got to 78 and I thought that was a good innings but your still in the game!
I think it's usually found that conifers are worse than deciduous for GNSS, at equivalent visual cover.
I will agree that decade old GPS equipment should be upgraded because it has made quantum leaps in that time.?ÿ New equipment will change your life.?ÿ Trimble is great stuff but spendy, Carlson makes a fine receiver that I've heard good things about.?ÿ?ÿ
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I spent a lot of time deciding which way to go and went with Javad and couldn't be happier.?ÿ I have their latest and greatest and it gets shots (good shots) in places you would never believe.?ÿ More than that, the information available on each shot allows you to instantly judge how trustworthy each shot is.?ÿ Another bonus is the compact package.?ÿ You can put the rover head on a collapsible lightweight pole and it is its own data collector so no heavy chunk on the side.?ÿ You can also get the Jtip which is a screw on metal detector on the bottom of the rod and head deep into enemy territory by yourself with less gear and weight.?ÿ I am also a solo guy and lean and mean is important.
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Not sure how fast you want to make a decision but the decision makers at Javad corporate have realized that word of mouth has been their best advertising so they have knocked off 25% for a base/rover package until the end of May (Monday) I believe which will save a purchaser over $8,000.?ÿ You can get what I think is not only the best priced but the best GPS equipment available in the world for about $25,000.?ÿ Like Nate, I am not a salesman, just a surveyor that loves his equipment.
There is a lot going on in a javad.
Mine is the OLD not upgraded LS. I'm using a t2 on base. I've turned on EVERYTHING the t2 can do. (I got help from another user, who is smarter than I am, to do this) so, I'm running all the USA satellites, all GLONASS, and a portion of bideu, and a portion of Galileo.
I'm running the 2 engine firmware. It's as good as it can do. Without spending some money.?ÿ
I've ordered a new t3. It's not here yet. This will give me full 4 constellation. But, the LS will not fully process all this data, as good as the LS plus will. Robert, there is alot more going on in a javad, than probably any other gear.?ÿ
After I get both the t3, and LS upgrade, you will hear more noise out of me.
Nate
See my reply to robertusa above.
I'd want to fully upgrade to the t3 and LS plus, for that environment!
But, I'm confident it'd do it.?ÿ
There are a dozed field tricks you should learn. Also, update from a clean install, and your LS will run faster.
It's beautiful in NZ
Nate
So I??ve used the Topcon Hiper VR base & rover system about 2 years ago with a Topcon FC5000 & Pocket 3D software before for extensive topo under selectively cleared pine canopy (Longleaf & loblolly pines that were maybe 50-70?? tall). The developer preferred to have smaller swale easements every lot line or sometimes every other lot line @ 100?? apart so the contractor used a mulcher on every easement & the 60?? R/W for the streets.?ÿ
site was calibrated using another??s control & everything checked really tight but majority of the control was fairly open. Up on the high point the GPS worked flawlessly. On the low side of the site surveying the edge of wetlands (very thick & not cleared) I would occasionally lose RTK lock but regain it within 30 seconds or so - you can always tighten or loosen your acceptable tolerances for this. I decided since there was plenty of poison still around that I??d ride the site on a Kubota with the tablet & rover with the base setup on the high ground. Was able to topo the site in half a day with multiple stops due to the Kubota dragging debris. That being said - I would try to reobserve really important horizontal & vertical aspects multiple times at several hours apart where possible
Upstate NY....javad ls plus and t3 user...very happy....just the support and javad community is worth giving them a shot. Browse their web site and youtube channel and see the kind of company they are. Guys in the field involved in support and design every day
I had a feeling this thread was going to turn into a Javad commercial.?ÿ
@LeeGreen,?ÿ
I used to be a Topcon fan. Back when they were painting Javads yellow, and selling them!
(Big ????)
Nate
Yes, I remember. You also used some old L1 gear. Was it Locus?
?ÿI feel the OP can do well with adding static and post processing to his tool kit.
I'm a fan of sticking to one label as it seems to work best when labels are matched. Plus I'm vested too deep in one label to change, as my pockets are not that deep.
Recently I jumped into Terrestrial Laser Scanner game. I works wells so far with all my gear. Currently workung on 3d virtual walk thru. Not much use for boundary work, unless you want detailed topo.
Yes, I remember. You also used some old L1 gear. Was it Locus?
I've still got 5 of them.
Still have 2 Topcon legacy e units.
I'm worried that someday, a Chinese (or other) gps unit will get real good, and that will give everybody a GPS unit, for less than $ 1000.00 and that will kick the big players out, who are the inovaters, who have invested in r&d, to get us where we are, and that this will cause innovation to stop.
I love the innovation, and fancy ability to get shots, that were impossible with GPS several years ago.?ÿ
I want the innovation to continue.
When I've hiked up some steep canyons, and found an old survey mark from the 1970's, and I stick my javad LS on it, and wonder if I am going to get it, and 15 minutes later, I've got 3 shots, within an ellipse that's 0.12' x 0.06', it puts a smile on my face.
My name is Nate, and I'm an innovation addict! I admit it.
Nate
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Yes, I do the same with my gear. In woods,, I run my gear similar to your LS. I collect static at the base and rover, while doing RTK. In heavy multi path areas where I have only one rover with me, I will collect 180 epochs of rtk. Dump the SV's then collect again using same point number in controller.?ÿ The field software gives me the option to overwrite,?ÿ rename, or perform a weighted average. After all of that I also have static data to compare with the RTK when I get back to the office. On large wooded tracts I just leave static rovers at each monument I find during my reconn. After all recievers are out I take a break for a few minutes or so, then go back and pick up the recievers and do it all over again. If I don't find a monument at its general location per record, I set a coordinate pair to stake from using TS.?ÿ
Nate, are you comfortable setting a monument with RTK under dense canopy? Not me.
Nate, are you comfortable setting a monument with RTK under dense canopy? Not me.
I've got something called RTPK. Real Time Post Processed Kinematic.
So, I get post processed data in the field.
And, a single javad rtk shot, is a very cleverly designed series of resets, independent shots, and epochs.
And, I ALWAYS re shoot the rebar as set, afterwards.
Now, facts.
I feel that set rebar, are probably 0.02 to 0.05' LESS accurate, than found monuments.
I've thought of using rtk to get within 0.25'. Then, shoot it 3x, this would be on a dimple in the dirt, or a nail, then use compass and box tape, to set the final monument. But, often, I just don't care about a few hundredths.?ÿ
Lee, let's meet and I'll demo it. It'll blow your mind. But, let's wait a couple of months, till after I get my LS ?? plus. I'm getting it upgraded, to the ?? model, but they are out of parts. I'm told it'll take 4-5 weeks to ship both ways, get in line, and get the guts changed.?ÿ I've ordered a Triumph 3, for my base. This will bring my base up to date, with 4 constellations. But there is a delay on getting the rover updated.
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Nate
No need for that. I live only a 12 miles from Duane Frymire. If I needed to see it, I'd contact him. We did meet on a project several years ago.