paden cash, post: 401992, member: 20 wrote: Pack that stuff up and take it to someone asap.
I agree. It aint normal.
Maybe even a cracked component, or loose connection.
The Hipers have a nut internally right below the radio antenna that can come loose and the boards start shifting around. When I had this happen, I experienced something similar to what you are experiencing. Take them into the shop and have them looked at. I'll bet there's an issue with the rover.
Have you updated the software? Could be a bug that is showing a fix when it is not fixed or an exponential number of other possibilities. My experience when things just don't make sense is to reload the receiver, collector and any other related software. If you get the same answer, I would be thinking that the problem is in the hardware. Your equipment provider should help you to try a different radio, receiver and any other combination. There is an answer.
Ric Moore, post: 401996, member: 731 wrote: The Hipers have a nut internally right below the radio antenna that can come loose and the boards start shifting around. When I had this happen, I experienced something similar to what you are experiencing. Take them into the shop and have them looked at. I'll bet there's an issue with the rover.
Like I said my buddy brought his the same day and been having the same issues. He lives in a different area than I
4 years. That's a LONG time to fiddle with it, and NOT have it working right.
Maybe the 3 yr warranty has expired??
You need a Topcon expert...
If it were my gear, and it was malfunctioning like that for a month... we'd be shakin things down...
He said when he changed to the other collector with the same software, it gave better positions.
It must be something with the software settings in the collector giving the bad readings.
Compare all the settings. Something is different.
Nate The Surveyor, post: 401980, member: 291 wrote: Whatever is going on... You should ascertain whats going on...
When was the firmware last updated? (somebody may have set it to store floats, but the real problem was out of date firmware).
N
What is the the firmware in the Hiper V? is it 4.7? Do you have TRU on your controller? If so, connect to receiver managing, and Information. It will tell you the version. Older firmware did sometimes "puke" and store float points as fixed. The other thing I would check ( I dont know TDS at all) are your precision tolerances. Perhaps you have them so high, that it stores a point within 0.5' instead of 0.05'. Thinking that is a fixed position.
mike thornton, post: 401929, member: 12289 wrote: .... I BOUGHT A SET OF HIVER-V TOPCON G.P.S. RECEIVERS ... ABOUT 4 YEARS AGO ..... I HAD COMPLAINED OF THE PREVIOUS HIPER PLUS LYING TO ME .....
So you have had 2 different sets of receivers paired with several different dc's giving you float solutions in various situations over a period of years. It seems to me that the one common element here is the operator. You may simply be pushing the equipment too hard. Review your procedures. Some things to focus on:
- Set the base up in very, very open locations. Even if the rover is in the wide open if a truck passes by your base, you may loose "lock" at the critical moment.
- Collect point data over multiple epochs. Even for topo points, at least 3 epochs. For Control & boundary 30 to 180 epochs.
- For critical points, such as control/boundary, tie points at least twice, dumping the solution in between ties.
- Keep an eye on the solution status, especially when in high multipath or obscured environments.
- Read and understand Henning's User Guidelines for Single Base Real Time GNSS Positioning.
I currently use a pair of Topcon Hiper Lites, c.2003 models. While they are anything but "lite", they are just as reliable as the Trimble, Leica, and Spectra Precision models I've used in the past.
Mark Mayer, above is right on.
I have a set of LEGACY E units. out in the OPEN, I can get a BAD shot, if I move the pole too fast, and IMMEDIATELY press save. It gets momentarilly "lost". Let it settle down, and take a shot.
N
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Nate The Surveyor, post: 402028, member: 291 wrote: Mark Mayer, above is right on.
I have a set of LEGACY E units. out in the OPEN, I can get a BAD shot, if I move the pole too fast, and IMMEDIATELY press save. It gets momentarilly "lost". Let it settle down, and take a shot.
N
f course I set the base in the open.rover fixed 0.02 horizon 0.02 vertical more or less then collect the shot don't know what else you could do. I've have software updates been back to dealer talked to Topcon representative bottom line they want to sell you something else rather than worry about it ! I'm calling Topcon representative again this afternoon
Just because it was in for service, doesn't mean they upgraded the firmware. Do yourself a favour and check.
It's what you asked for...
Other users, to "pick" at your situation, and try to find whats up.
We are trying.
N
mike thornton, post: 402052, member: 12289 wrote: rover fixed 0.02 horizon 0.02 vertical more or less then collect the shot don't know what else you could do
How many epochs do you collect?
Well I better add my 2 cents to this.
I agree with everyone else on firmware and updates. Check it don't take someones word or assume it's up to date and been done. DC, GPS units, radio everything.
The missing points by feet sounds like float solutions being stored. But it's set to store fixed only so.... It's technology I don't think any of us fully trust it.
How big is the job you are working in the DC. I've seen massive jobs bog the collectors it lags the screens out bad. So bad I stay extra still until I see that screen change and update my Map with a point stored where I was standing. I've watched my epochs complete and take one or two steps and here the dang thing ding and it recorded where I just stepped to instead of my intended position.
The days you get these bad shots or results Have you ever done any mission planning for that day? How many sats are being used for your fixed solution.
I'd be interested to see some data from the day it gives bad information compared to a good day.
One thing required at my company when using GPS is that you must compare your GPS to a gun measured distance. We struggle with guys understanding what grid to ground is and when they know if they are on grid or ground. On a bad day I'd take two innervisable points a half mile or more apart record a gun distance, RTK distance and run a static for 30 minutes or more on the two points.
When setting your base up make sure that thing is out on the tripod and been running for a bit before you start making it work. I've had guys power it on and tell it to go as soon as they see lights and it isn't even had a chance to figure itself out yet and it shifts stuff by feet. Same goes for the Rover. Power up on a pole or tripod. Never on the ground or on the hood of the truck.
If it's lose hardware. Have you tried flipping the base and Rover around. A lose board in the rover to now a base won't be moving. But I suspect lose hardware it'll either work or it won't. It won't give some in-between result.
Also resetting the RTK properly can do wonders. Flipping it upside for a minute isn't the right way. Unsure of the TDS Topcon procedure. But I've seen long distances traveled in a constant fix generate bad results of a few tenths never feet or canopy areas. But once RTK was reset all was good.
Are you using an internal or external radio? 4 years old how are the batteries holding up? Do you use an external battery supply for the base? Improper voltages can cause weird stuff to happen to as well.
