I think there is more to it than the difference of the origins. That difference is fixed. But the coordinates of WGS84(xxx) are a snapshot of the IGS...

In the long term, is continued GNSS a given? A really far-sighted system would provide for the eventuality of funding cuts or adverse international s...

Nate The Surveyor, post: 406027, member: 291 wrote: 62 days, gestation for a dog. But isn't human gestation time more relevant for you, Nate?

paden cash, post: 406006, member: 20 wrote: Anybody else see the correlation? If you take the southern 20 out of 37.06 and equally divide what's left...

Table for the field book:-Measure slant. -Look at table. -Subtract value given from slant to get ARP height above mark. Formula is =A4 - SQRT(A4...

MightyMoe, post: 405933, member: 700 wrote: I use a graduated rodA 4-section rod came with the old Trimble gear I got. It screws together and is mark...

Dave Karoly, post: 405930, member: 94 wrote: The bumper is the dark gray strip ... It is at the bottom of the 0.010M dimension in the diagram Jim post...

christ lambrecht, post: 405922, member: 284 wrote: The bumper is locaties where the grey housing ends and the white housung begins But the bumper doe...

Jim Frame, post: 405849, member: 10 wrote: the place on the R8 housing -- it appears to be the bottom of the black separator ring christ lambrecht, p...

Two versions:

Jim Frame, post: 405781, member: 10 wrote: "I'm visiting relatives I'd really rather not hang around with for 3 days, so I found something to do that ...

I'm visiting relatives for 3 days. Today I braved light sleet to get a couple GPS sessions on interesting points. Went to download to the laptop and...

That would equally apply to a range of -30 to +90 or whatever.

If I recalled it right, 6.45e-6 x 30 ft x 120 deg F = 0.023 ft or 7 mm vertical movement over a rather large temperature swing. Differential heating ...