Comparison of technical specs from various GNSS makers?

Patrick Garner

Active Member
I'm frequently asked by potential Javad purchasers how the LS compares in specs to the latest, greatest Trimble xxx or some older Topcon (as examples). Has anyone here compiled a simple chart showing relevant data? I'm thinking # of engines, speed, etc.

If not here, is there anything reliable elsewhere? My guess is that Amer. Surveyor and POB wouldn't touch this sort of thing for fear of offending advertisers.

Seems like basic info. Your thoughts--?
 

Jim Frame

Well-Known Member
My sense -- with emphasis that I have a very limited understanding of what goes on under the hood -- is that performance is a function of the whole system rather than a tabulation of easily quantifiable components like number of engines. Signal processing hardware, processing algorithms and antenna design would, I think, play a much bigger role in system performance, and they're not easy to describe individually, let alone as an integrated package.

But I look forward to comments from folks who do have a deep understanding of such things.
 

Shawn Billings

Shawn Billings
5PLS
I agree with Jim. I don't think spec sheets do a great job of describing performance. I've accidentally used the LS with L1 only a few times and the performance was far superior to what I've seen from dual frequency systems from several years ago.
 

Nate The Surveyor

Well-Known Member
You can buy 2 ls's, and one base, and one radio, for less than a trimble r10, base/ rover/radio setup, run a 2 man crew, and seriously out run a trimble top of the line setup.
 

Duane Frymire

Active Member
I'm frequently asked by potential Javad purchasers how the LS compares in specs to the latest, greatest Trimble xxx or some older Topcon (as examples). Has anyone here compiled a simple chart showing relevant data? I'm thinking # of engines, speed, etc.

If not here, is there anything reliable elsewhere? My guess is that Amer. Surveyor and POB wouldn't touch this sort of thing for fear of offending advertisers.

Seems like basic info. Your thoughts--?
No, I will give them the JAVAD data sheet and they can get other data sheet from others if they want to compare. Tell them the stuff that costs much more will probably get similar results as far as fixed positions go, but they will have no way of really knowing that. No other system has the analysis and documentation capabilities of JAVAD to determine if a fix is bad, and then to determine a least squares positional tolerance. This is a huge issue for me. Some using the other stuff will analyze in a least squares program afterward, but many do not. And, that does not have any analysis of whether you had a bad fix. Six different algorithms (engines), all the channels, 3 different solutions to compare on each shot, 3 step confidence consistency verification and screen shots of same. There's all the other GNSS stuff, then there's the JAVAD way that removes the guesswork from modern measurement. A meaningful comparison is not really possible at this stage of the game. Much of the benefit is in the J-Field software. So, the sale point is convincing folks that yes they can have a dedicated GNSS system and make money with it. With this system you don't need to haul the robot around everywhere and switch back and forth (or come back and reoccupy 3 days in a row) just to make sure; the system will tell you those rare instances when you need to measure with conventional equipment.
 

Darren Clemons

Well-Known Member
No, I will give them the JAVAD data sheet and they can get other data sheet from others if they want to compare. Tell them the stuff that costs much more will probably get similar results as far as fixed positions go, but they will have no way of really knowing that. No other system has the analysis and documentation capabilities of JAVAD to determine if a fix is bad, and then to determine a least squares positional tolerance. This is a huge issue for me. Some using the other stuff will analyze in a least squares program afterward, but many do not. And, that does not have any analysis of whether you had a bad fix. Six different algorithms (engines), all the channels, 3 different solutions to compare on each shot, 3 step confidence consistency verification and screen shots of same. There's all the other GNSS stuff, then there's the JAVAD way that removes the guesswork from modern measurement. A meaningful comparison is not really possible at this stage of the game. Much of the benefit is in the J-Field software. So, the sale point is convincing folks that yes they can have a dedicated GNSS system and make money with it. With this system you don't need to haul the robot around everywhere and switch back and forth (or come back and reoccupy 3 days in a row) just to make sure; the system will tell you those rare instances when you need to measure with conventional equipment.
...as forest gump famously said.....and that’s all I’ve got to say about that....
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Patrick Garner

Active Member
Duane, eloquently done. Thanks, a definite keeper. Javad marketing could lift whole sections of your post to use in their monthly ads. Kudos, sir!
 
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