@350rocketmike?ÿ Paper towels are made from pulp wood, and the fibers can be abrasive. If you have to use one, pat but do not rub a lens. Find somet...

When checking repeatability of GNSS measurements, it is important to let some time elapse between so that the satellite constellation is significantly...

Well, not so many since I have not really been in the business, but yet a few: Done Leroy Lettering??ÿ Seen it done. ?ÿ Used a Lenker rod? I own on...

Save that view photo for the Next calendar project.

No problem if the footing looks ultra safe - not too close to an edge.?ÿ But the problem might be breathing at 13K+ feet if you aren't used to it.

Thanks!?ÿ Sorry for those folks who didn't have enough pixels -- I'll bet there were some good ones there.

The poster says he is in Wisconsin and I find this:

@holy-cow?ÿ

Yup. It was the SW corner in one case I saw.?ÿ I was out looking for a bench mark once when I saw a crew scratching their heads about the location of...

@holy-cow?ÿ Around here the older reference points I see are crossed nails on the side of a post, and newer ones are shiner disks. I haven't seen any...