Where Have You Been with Your LS Lately?

[Wes Cole]

Here's a nice picture from a couple of month's back at the historic Kenilworth Inn in Asheville. There's an NGS mark we're occupying here, "Kenilworth", with the T1M. DPOS results on "Kenilworth" compared to the published: N: 0.01', E: 0.136', U: 0.01' (30 minute observation). Used TCP and the LS to set a benchmark for an elevation certificate on a site about 3500' away.

 

[Adam]

Waynesville NC
Notice the smokey background from the wildfires we are having in NC.

 

[Adam]

 

[Nate The Surveyor]

Adam, I wish you'd share those last 2 photos, over on the General Forum, RPLSTODAY.
Name the thread "If it ain't Javad, it ain't happenin' ". Or something like that.



N

 

[Nate The Surveyor]

Also, a forum suggestion. It takes forever to LOAD these images. somehow, the THUMBS mechanism does not work well. ie, we would like the images to be TINY, unless clicked on. So that they load fast. (Armchair general here!)
Thanks for all you do.
Nate

 

[Wes Cole]

Smokey all around this area. In NW Buncombe County here on NGS "Big Sandy".

DPOS to published (45 minute session):

N: .018
E: -.024
U: -.079

 

[Adam]

Also, a forum suggestion. It takes forever to LOAD these images. somehow, the THUMBS mechanism does not work well. ie, we would like the images to be TINY, unless clicked on. So that they load fast. (Armchair general here!)
Thanks for all you do.
Nate

Nate, I like the big pics!

 

[Adam]

Adam, I wish you'd share those last 2 photos, over on the General Forum, RPLSTODAY.
Name the thread "If it ain't Javad, it ain't happenin' ". Or something like that.



N

Give me a few days. I have verified this shot with conventional traverse and will post the numbers too. It was a few hundredths.

 

[Wes Cole]

Nate, I like the big pics!

Me too! Loads really fast on my end, even from my phone.

 

[David M. Simolo]

Waynesville NC
Notice the smokey background from the wildfires we are having in NC.

Hey Adam, is that a rod with two bipods on it? I never thought of that before.

 

[Adam]

Hey Adam, is that a rod with two bipods on it? I never thought of that before.

You are correct.

 

[Nate The Surveyor]

I like the big pics too.... just not all the time.
In my pre-Javad days, I developed a few methods to check things.
Often, it was just move the rover 5 or 10 feet, and compass and box tape between them. This was done to change the multipath environment significantly enough, to provide a check. Often, I'd shoot the corner. Then the offset point, (Named it's compass and dist to corner) and then RE-shoot the corner. Others include SWING TIE. (D/D int) and straight line offset. Find corner, and flag it. Set up rover at offset 10-20 feet, and measure between rover, and corner. Use plumb bob to I-ball corner, and pole. Set Bob. Now, move rover to plumb bob position.
Now all 3 are in straight line. A good fast check of my data.

I don't often do this today... but the concept remains the same VERIFY!

N

 

[Adam]

View attachment 5733

Here's the numbers on the shot under the tree. AP13 is the RTK derived point from the LS, TH292 is point from total station.

AP13 676582.2010 823861.6870 RF 5/8" FLAGGED AT BASE TR 18WC
TH292 676582.2011 823861.6582 RF 5/8" at base 18" wcherry

 

[Shawn Billings]

Hope you reconciled those differences with a properly weighted least squares adjustment, Adam.

 

[Nate The Surveyor]

Kent Mc would be deadly with an LS!

 

[Adam]

It's close enough for me. I was worried about the location and checked with the TS because the math showed the corner about 3' from where I found it. It was a capped 5/8 rebar the same as the other ones and doesn't appear to ever have been disturbed. The LS has never failed any time I have checked behind it. I had 240 seconds of RTK and the static for that shot disagreed with the math by about 3' so I had to double check it.

 

[Shawn Billings]

The technology is no replacement for good surveyors doing good work, using good judgment and good procedures. You were right to check it. The LS simply gives good surveyors a good tool to do good work. On the flip side of that, I know that a poor surveyor can squeeze out poor results from the LS. If the checks don't all line up, you've got to get some sort of additional redundancy to make sure it's right, either a repeat shot or total station tie.

 

[John Evers]

Nothing beautiful like above, but the following screen shots, and photo of the culprit are nothing short of stunning. The photo is of Sprint rooftop antenna installation. I was accessing the Ohio RTN, using the internal GSM modem, connected to AT&T. They are both GSM based providers, and the nearest AT&T site is 2000 feet away. Congratulations to the modem designer. I am only 15 feet in front of the Sprint antenna.

Even more impressive is the spectrum shot showing the massive interference on L1, and as can be seen, I had a six engine fix. When I manually pressed reset RTK, it took all of 2 seconds for a new six engine fix.

 

[David M. Simolo]

Interesting view near Branchport NY in the Finger Lakes Region. The LS tore this job site up.

 

[Nate The Surveyor]

It still amazes me, at what I can do with the Javad LS.
I am glad you are enjoying it!
N