That is a bit strange. At 4 per second 222 seconds between first and last would get you 888 intervals or 889 readings. The extra 0.2 seconds could ...

The thing missing from your mix that the sports drinks include is potassium. You need to maintain a potassium to sodium ratio, especially for the hear...

Can you open your Rinex file with an editor and post here the header and first few lines of data? That would allow a much better guess as to the probl...

I can see how refraction can cause a bias because your uphill line of sight is closer to the ground than the downhill one, and the refraction won't be...

Yes, IF the instrument is out of adjustment and IF the legs are not balanced and IF you use the same leg distances for each measurement, then there is...

What makes it questionable?

I vote for two setups of the level between each point and the next, making sure you read at least a half-foot different between setups.?ÿ That's essen...

says they don't make 'em like they used to: M-80s were originally made in the early 20th century by the U.S. military to simulate explosives or artill...

I heard of a guy that was making big money.  . . They caught him because it was 1/8" too big.

While I agree that position in the world is less important than relative position of local points, I suspect the original poster has only one receiver...

Please ignore that comment about square roots, which is way off base. Weight by hours.  Can I plead senior moment?

Paul, please explain the difference between "resection" and "free station." I was under the impression they were names fo nearly the same thing. ...

Older material may assume resections are done with angles only, so you need a minimum of 3 known points plus check measurements.?ÿ Modern instruments ...

If you are using a projection grid like SPC or UTM it is ESSENTIAL you understand what scale factor, elevation factor, and combined scale factor are.?...

It is always very desirable to wait until OPUS will use "rapid" orbit data rather than "ultra-rapid" as there is often significant improvement.?ÿ That...

As Nate alluded, there are multiple sources of error. Here's my intuitive version of what's going on. The best relative position vector between nearby...

Today I was contacted through the amateur benchmark hunter forum, probably because at some point I mentioned State Plane Coordinates in a post there.?...

But with this rule, if they seal a plat with a virtual corner or you find they pincushioned without notice there is an easily proven violation to help...

I would hate to work in a state where recording was not required. The owners brought this on themselves by not recording the adjustment.