Bad fix.

[Charles Craft]

I believe I got a bad fix with my LS yesterday. Point # 55 is about 8' from the correct position. I do not know how to do a screen shot, or send in a file. I do know how to connect to RAMS if any one wants to look at it. I was not keeping paper notes, but I remember that one time I got the option to accept or reject at about 50 EPOCHS. I chose resume and it went to 121 plus EPOCHS.

 

[Adam]

Charles, bad fixes are very abundant in the woods. There has to be enough time and or number of engines fixed to weed thru the bad ones. Did you shoot it multiple times? If so and you caught the bad fix, i'd say you hit a homerun. Which rtk firmware? Were you using a Javad base or an rtn? How many seconds was the observation? Which action profile were you using? What's the serial number of the LS and is it on RAMS now?

 

[Charles Craft]

s/n 298. I was on the open in a new cemetery going down a line of wire flags 4.5' apart. Every shot went to 120 plus EPOCH. I one strange thing that I mentioned is the only unusual thing that happened. I am connected to RAMS now.

 

[Charles Craft]

I was using a TR-2 for a base. It was in view of this shot and about 150' away. The radio may not have been in view. I began the third sentence above "I" Should have said "The".
This is my first bad fix, and it scares me. In the woods, I let the LS sit until it completes and then repeat.

 

[Adam]

Looks like the PPK is correct judging by the inverses to the previous and next point (4.5')?

30 seconds is not long enough to know for certain that a fix is correct. Which profile were you using? You should turn on screenshots for every profile you use.

 

[Charles Craft]

Thanks for your help. I have not used PPK and do not understand what it is. I will learn how to do a screen shot. I will check to see what profile I was using when I disconnect form RAMS. Am I ready to disconnect?

 

[Adam]

To turn on screenshots, tap the compass button in the action screen. Then tap what to record and check screenshots.

 

[Charles Craft]

Done. I downloaded point 55 again and loaded it to my COGO program. It is correct. My JAVAD system is the best with the best support.

 

[Nate The Surveyor]

Charles,
I could type out 10 pages of historic details, to explain this, but this is going to be brief.
Using our old Topcon gear in the woods, required multiple observations, over a time span, that agreed with each other. I set mine up on a section corner, under an oak. Sat there for 3-4 hours, got a pile of coords, inside a 10 foot circle. I finally concluded I had it within a foot, via the statistical pile of 25 or so coords.
What the javad does, is an automated, and condensed form of that.
Get some help to get your settings right, for woods work.
Ie, verify on, 200 seconds, etc.
Thank you,
Nate