nothing, it just keeps on pumping out corrections like nothing ever happened......
Had my base set up here. 
Great position for a base, anyway, taking a break at the van 80 or so meters away, I ask my assistant to go fetch the rover which we left by the base.
He comes back 5 minutes later , with the base and rover all still running live.... And plonks both down next to the van, at first I'm pissed, because we have not finished with the GPS, but the property owner asked him to remove everything so he could let his dogs out while we take lunch .
I am curious why the rover is not complaining about anything, as it is still fixed, try and stake out the control point the base was on , and it tells me that it is 1m away or so, right next the van were the base is now standing ...
I know all the processing gets down on the rovers controller , I just always assumed that if your base got disturbed , you would get some sort of warning .
So I can just imagine the scenario were the Gardner moves your base to cut the lawn, then puts it back 20 minutes later, your survey is going to have an ugly kick in it and you will never know why.
Anyway, it was a great day to be surveying and lesson learnt. By the way , I very seldom use my base as we have a really good VRS network here , so please excuse my ignorance on these matters , there was just really bad cell signal here , so a base was the way to go.
And that, kids, is why you get check shots regularly throughout the day.
But isn't it doing what its supposed to?
If its only 1å± metres away (both beside the van) then its reporting correctly.
Its using the difference between 2 receivers to report to the DC.
If someone flogged it and assuming still upright and within range then it should give you some idea its not where you expect it to be.
Fascinating looking country.
Owner likes dogs? Real and concrete ones?
Richard, post: 330010, member: 833 wrote: But isn't it doing what its supposed to?
If its only 1å± metres away (both beside the van) then its reporting correctly.
Its using the difference between 2 receivers to report to the DC.
If someone flogged it and assuming still upright and within range then it should give you some idea its not where you expect it to be.Fascinating looking country.
Owner likes dogs? Real and concrete ones?
Yeah I suppose it is doing exactly what it is supposed to , I am just so used to get a tilt error message from my robot for even the slightest of twitches , I have become complacent .
I think I assumed that if the base was moved more than a certain distance from its reported autonomous position versus its actual keyed in position , it might starting warning you .
There was a big fire here 7 months ago , this whole mountainside , forest and both houses either side of this house were razed to the ground . You can see the color of the trees were the fire ripped through them .
The owner told me and showed me some pictures of the event , scary stuff , this is what is palm trees around his pool look like 7 months later, still all singed
How his house made it , while the other two didn't is amazing . But his roof line is about 3-4m lower than the neighbors , he reckons the flames just went right over .
Sympathise with them on the fire front.
Forest, bush fires, even grass fires are horrendous events.
I've noted USA has had a fair share in recent years.
I used to only think Australia, but nowadays its a worldwide phenomena.
Probably explains the look of the trees in top photo.
I did wonder if they were alive?
Sounds like the base did not move enough to throw everything out. If lock was lost, it may not have refixed, but once lock was on it takes a fair amount to knock it out. Can't remember who the surveyor was, but had his base set up over a nice corner section in a pasture of sorts. Went surveying and came back at the end of the day to his base looking a little skewed. Apparently the land owner needed to mow and moved it out of the way and then "put it back".
I had my base set up for RTK collecting data (no control to check into) and the wind blew it over and the base was still sending out corrections lying on the ground. I took a bunch of random shots along the day's timeline, pinned down the event and resurveyed everything after that point.
Love the pictures! Pretty area.
The base does know it's autonomous position, accurate to 5m or so. Our base (Trimble SPS985) has a setting to warn if the autonomous position changes over a user defined threshold. This would need to be set greater than the autonomous accuracy obviously. There may be a setting on yours, but it would not help for small movements which would be the most likely scenario.
squowse, post: 330020, member: 7109 wrote: The base does know it's autonomous position, accurate to 5m or so. Our base (Trimble SPS985) has a setting to warn if the autonomous position changes over a user defined threshold. This would need to be set greater than the autonomous accuracy obviously. There may be a setting on yours, but it would not help for small movements which would be the most likely scenario.
I think I will look out for that setting , in this case , the base was moved over 80m or so
I was redheading on a highway project and on the project they has two blades and a dozer all running machine control. Well two miles back the hydro seed guys accidentally sprayed the contractors based setup with the hydro seed gun and knocked it over. Well at that exact moment the blades of the graders and the blade of the dozer all dropped 4ft! Pretty amazing when a grader is going 6 mph and suddenly droppes one side of the blade 4 ft into the ground. It brought those 3 pieces of equipment to a sudden stop and sure woke up the operators!
