Topo with ATV

A.lacey

Member
This is how i locate trails.
 

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It is a SECO quick release prism adapter that I modified with a little lathe work to fit to the Javad - Benro mono pole. Made a brass adapter for the mono pole top and a SS bolt to fasten the tip to the LS to minimize any magnetic affect on the compass sensor. The tip on the LS also anchors it to the truck dash mount and my office inclined "cradle" for desk work.
 

Nate The Surveyor

Well-Known Member
I’d like trajectory to have a different color for the active trajectory. (Different from previously stored trajectories)
Often, I run trajectory, and then wish to re run it backwards, or crisscrossed. So, by simply storing the first set, then re running, (using review screen) I can see the ACTIVE trajectory, and tell what is previous. Re running backwards, is handy, if you pass under an obstruction. Because you have a good lock, from the open spaces, then go to poor sky view places, from good, but from multiple directions.
Also, the ability to name them, after making them, would be good.
How about a splash screen, called “manage trajectories” that allows us to set color, rename, delete, or otherwise deal with them. Or, even set a new “target height”. Just the same stuff as the points screen has.
or rename them.
or, add a note to them.
Trajectory has become a very important part of the Javad game changer.
Thank You,
Nate
 

Jim Frame

Well-Known Member
Because you have a good lock, from the open spaces, then go to poor sky view places, from good, but from multiple directions.

Is this notion based on fact, or just an old-thinking sense that one can "carry" an integer fix from a good environment into a bad environment and get a reliable position? I've always been skeptical, but have never really tried to think it through (and may not have sufficient understanding of the details to do so anyway).
 

John Troelstrup

Active Member
I am with you Jim....I have heard people with other GPS equipment obtaining lock in the open and walking into the canopy and "Carry the signal"....
I have never trusted such a report.

On a side note - I notice so very often , when doing location work....My Triumph will report 6 locked - until I hit record and then my number of Sats fall of a cliff

Is this notion based on fact, or just an old-thinking sense that one can "carry" an integer fix from a good environment into a bad environment and get a reliable position? I've always been skeptical, but have never really tried to think it through (and may not have sufficient understanding of the details to do so anyway).
 

Nate The Surveyor

Well-Known Member
Well, Jim, this is coming from a different point of view. GPS was largely intended to guide missiles. It had algorithms for moving objects. It actually tracks better, when in motion. I have proven this to myself. So....
From the wide open, and passing through a “bad spot”, it can sometimes track all the way through. Because, it is simultaneously looking at the velocity, that is speed, direction, and rates of change in direction and or speed. So, some of this ability is left in most GPS receivers. I’m sure somebody else could give you a much better description of this, than I did. This is from memory, either from an old article, or lecture. So, believe this at your own risk. But, experience of my own seems to back this up. With my old Topcon legacy E’s, it would register FIX, While driving my atv at 20 mph, through places gps don’t go. It seems that there are more “interrupts” built into the Javad. But, it seems that the affect is still there. So, by driving down a road, and passing from “wide open” to under a big tree, or a series of trees, it carries the lock to some extent. When going through a bad spot, and it looses lock, I usually drive slow to the next semi-open spot, stop and wait. After regaining FIX I continue on.
ive played with it, on roads, that I had previously surveyed with fully verified shots. It’s amazing how well a moving gps works. I believe it works BETTER when in motion. This is the effect we are looking for.
ymmv. Thank you
Nate
 

avoidthelloyd

Active Member
Using an atv, it’s hard to totally stay close to grid lines.
I wish there was a sequence in trajectory, to “set up grid lines” then, drive those grid lines, with a large arrow, pointing left and right, with a number showing how many feet R Or L to be on grid line number. A numerical system to just number the grid lines.
33 ac of field can be driven twice, in 2 directions ew and NS so as to cover it all.
it’s phenomenally fast. Run it 2 or 3 ways.
n
YES!
 
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