In thinking about DPOS

[Nate The Surveyor]

I have my BOUNDARY profile set to Record GNSS raw data, all the time.

So, what this means, is that IF the RTK procedure takes 4 minutes, the I have a PPK file, that is 4 minutes long. If I do this 3 times, then, I have 12 minutes worth of GNSS data. In 3 sessions.

Now, if these were all in ONE file, I think it would generate a BETTER solution, than 3 individual files. I am an old "GPS abuser" (of sorts) pushing the limits.

I have a L1 Ashtech Locus file, that is over 36 hrs long. It only generated a FLOAT solution! It was on a Section corner. It was ESSENTIAL that I get that shot that day...even if it was a few feet off. So I just left the GPS out all night, and picked them up, on the way out, the next day.
Later, I used the Total station, and reshot it. It was 0.01' off!!!
So, even though it said FLOAT, it actually had resolved it. I later got a better version of Ashtech Solutions, and would have been able to "Clean" that data, by trimming out the bad data. And, It probably would have said FIXED.
But, this was only after having my locus units for 2 mos or so.
(I also got a shot by a metal chicken house, that NEVER really was any good, but that is another story!)

So, my question is: "Is a single 12 minute file better than 3, 4 minute files?"

I think it is. But that is based on my experience. The idea is that the trajectory of the satellite is un interrupted. An un interrupted Satellite stream, seems to yield higher precision.

Right or wrong?

N

 

[Matt Johnson]

Yes, a single continuous file is better for post-processing.

 

[Matt Johnson]

Javad's response to this question in the past has been: "In Post-Processing splitting the file does nothing. It hurts rather than helping. In post-process data is verified back and forth and outliers are removed. It is not like RTK that each epoch is seen only once and we don't go back and forth."

 

[Nate The Surveyor]

OK, on this note, there is a button on the LS, that counts up to 300 seconds. (Which I'd like the timer to keep running, even after the 300 seconds) Maybe another color, or such...)
If this button became a PORTAL, to the DPOS setup world....
We could perhaps, have some mechanism to set up the PPK file to run continuously, until the end of our whole session, on a particular point.... Making it into a single file. This continuity then, would make for a stronger DPOS solution, of 15 min duration, that was stronger than 3 separate files, of approximately 4 to 5 min duration.
I am finding that in bad woods situations, the DPOS solution is not as strong as the Beast RTK modes. And, trying to find a way to improve this.
Thanks
N

 

[Nate The Surveyor]

Or, any mechanism to allow a single, long, continuous file, seems useful.