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Effect of falling snow on EDM

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Williwaw
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I was out yesterday doing an as-built on a wireless tower site and got hammered by a sudden spring snow storm while taking shots with our S6 and this morning got to looking at the data I've got a couple wild shots that appear off by several feet. I was using a peanut prism to pick up the precise location of switches in the enclosure when it began to dump. Wet heavy snow that melted more or less on contact making it real tough to keep the controller clear enough to see what's going on. I'm starting to wonder if the S6 was picking up the return on some of those falling flakes giving me some bogus distances. The angles look right but the slope distances are not what they should be. Anyone ever have trouble with their EDM in falling snow? Confess to being a bit surprised at this happening. I've only really had problems with fog in the past, but my first time running the S6 during a good dump of snow.


Just because I'm paranoid, doesn't mean they aren't out to get me.

 
Posted : March 16, 2016 11:09 am
Jim in AZ
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Williwaw, post: 362613, member: 7066 wrote: I was out yesterday doing an as-built on a wireless tower site and got hammered by a sudden spring snow storm while taking shots with our S6 and this morning got to looking at the data I've got a couple wild shots that appear off by several feet. I was using a peanut prism to pick up the precise location of switches in the enclosure when it began to dump. Wet heavy snow that melted more or less on contact making it real tough to keep the controller clear enough to see what's going on. I'm starting to wonder if the S6 was picking up the return on some of those falling flakes giving me some bogus distances. The angles look right but the slope distances are not what they should be. Anyone ever have trouble with their EDM in falling snow? Confess to being a bit surprised at this happening. I've only really had problems with fog in the past, but my first time running the S6 during a good dump of snow.

We have issues with rain/snow falling on the screen of the DC. Can't say I've ever seen an issue with it on the other equipment.


 
Posted : March 16, 2016 11:26 am
vern
 vern
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Williwaw, post: 362613, member: 7066 wrote: sudden spring snow storm

Technically for another five days or so it would still be a Winter snow storm.


 
Posted : March 16, 2016 12:50 pm
Williwaw
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vern, post: 362628, member: 3436 wrote: Technically for another five days or so it would still be a Winter snow storm.

My optimism shining through.

Got to go back for one stinkin' shot that must have bounced off the perfect 'Winter' snowflake.


Just because I'm paranoid, doesn't mean they aren't out to get me.

 
Posted : March 16, 2016 1:01 pm
craig1971
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I have had problem with snow on several occasions. I have an S6 also and it will bounce of the snow flakes and cause erratic behavior. I can not do any work during a moderate snow fall.


 
Posted : March 16, 2016 2:49 pm

christ-lambrecht
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Guys,
Is this only with the passive prisms? Or did anyone notice this behaviour with the active prism too?
Chr.


 
Posted : March 16, 2016 2:56 pm
conrad
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Williwaw, post: 362613, member: 7066 wrote: I was out yesterday doing an as-built on a wireless tower site and got hammered by a sudden spring snow storm while taking shots with our S6 and this morning got to looking at the data I've got a couple wild shots that appear off by several feet. I was using a peanut prism to pick up the precise location of switches in the enclosure when it began to dump. Wet heavy snow that melted more or less on contact making it real tough to keep the controller clear enough to see what's going on. I'm starting to wonder if the S6 was picking up the return on some of those falling flakes giving me some bogus distances. The angles look right but the slope distances are not what they should be. Anyone ever have trouble with their EDM in falling snow? Confess to being a bit surprised at this happening. I've only really had problems with fog in the past, but my first time running the S6 during a good dump of snow.

Hello Williwaw, we had this problem occasionally with our S6 DR models in perfect sunny weather to prisms - no snow involved. We came to accept it as a hidden, bonus feature of the Trimble DR model. We never saw it on the phase EDM S8.


 
Posted : March 17, 2016 3:23 am
Kris Morgan
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Williwaw, post: 362613, member: 7066 wrote: I was out yesterday doing an as-built on a wireless tower site and got hammered by a sudden spring snow storm while taking shots with our S6 and this morning got to looking at the data I've got a couple wild shots that appear off by several feet. I was using a peanut prism to pick up the precise location of switches in the enclosure when it began to dump. Wet heavy snow that melted more or less on contact making it real tough to keep the controller clear enough to see what's going on. I'm starting to wonder if the S6 was picking up the return on some of those falling flakes giving me some bogus distances. The angles look right but the slope distances are not what they should be. Anyone ever have trouble with their EDM in falling snow? Confess to being a bit surprised at this happening. I've only really had problems with fog in the past, but my first time running the S6 during a good dump of snow.

I can honestly say I've never surveyed while it's snowing. Living in East Texas, if it began to snow, I'd call it a day. 🙂


 
Posted : March 17, 2016 7:31 am
lee-d
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What is this "snow" you speak of? 😉


 
Posted : March 17, 2016 10:47 am
Williwaw
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Lee D, post: 362808, member: 7971 wrote: What is this "snow" you speak of? 😉

Yeeaaa ... I was pretty sure 'y'all' southerners would find this whole concept alien, but it does exist up here in the north on occasion. I'm pretty sure what I'm up against is the same thing that happens when I'm driving through falling snow and put on my high beams and am instantly blinded by all the light reflecting back in my eyes. That white stuff is super highly reflective and it's affects on the EDM signal appear to be quite random. Now does it effect an active prism the same? Me don't know, but I sure won't rule it out. Based on my recent experience, if the snow flakes be falling, I'm boxing up that S6, or taking every precaution I can think of to catch the bogus shots.


Just because I'm paranoid, doesn't mean they aren't out to get me.

 
Posted : March 17, 2016 11:03 am