The list it gives when you click on the box is .jps, .18o, .19o, .20o, .21o, .22o, .23o, .24o, .25o A long way into the future but little history.

The optimist says the glass is half full.?ÿ The pessimist says it is half empty.?ÿ The realist says the glass is twice as big as it needs to be.

I would expect that an interpolation/extrapolation of the data for GPS frequencies would be pretty close for other GNSS constellations in the same gen...

I noticed a minor problem in the DPOS detailed report.?ÿ It appears they compute back azimuth between stations as forward azimuth+180, which is seriou...

And good advertising. The Iowa DOT network and Missouri DNR stations appear to be included. Did you explore the difference between JUSTIN and GIODIS p...

Note that geocaching has a snapshot from about 2000 and does not update them.?ÿ So you won't find NAD83(2011) coords, geoid updates, or newer marks.

Just coords, no metadata??ÿ That's usually the problem with coordinates. N75W is maybe WGS/IGS vs NAD83? Usually a scaling or wrong kind of foot would...

And your WGS84 coordinates will need to be "translated and tweeked" when you go back in 5 or 10 years and find that the continent has moved.?ÿ Just as...

I vaguely recall that the navigation calcs include a correction for height of eye above the sea. With angle above horizon, refraction correction, and ...

I ran an OPUS-S and got Rapid orbit data this Tuesday (Christmas) afternoon.

Dave, to be concrete about what could turn into a long discussion let's make up an example. Say 25 years ago someone didn't find the SW corner of sec ...

A stronger signal reduces the effect of interference and receiver noise, and may provide faster fixing, but with a modest amount of averaging the nois...

I would argue that an additional signal that has no systematic error but only random errors makes the result more accurate.?ÿ The improvement may be n...

3 signals gives 2 independent comparisons.?ÿ Given any 2 differences, the other difference is completely determined.

The point of departure on this branch of the thread was the comment that the land owner could do it with range poles, no instruments.?ÿ I was trying t...

I found this explanation and nice illustrations. It shows how you can sort of do the job of laying out a straight line on flat ground with 3 poles, bu...

I always thought Taco Bell was an ok place for a small meal, and you got decent value for the money.?ÿ I did, however, have one bad experience when I ...

If you scale all your GPS measurements for the mean of those two elevations, 85 meters, a 2 km line that is all at one of those elevations will be on ...