Looks like you missed out on this bargain:

The original posterƒ??s guess that the difference in coordinates is (solely) due to velocities is incorrect. As Mr Hamilton writes, OPUS solutions ar...

@bill93 on the issue of the navigation message, this file is available via the User-friendly CORS link on the NGS home page. ƒ??one can obtain the f...

@geodesist I have used Scilab over the years and found it quite robust. As I had access to Scilab with my last employer, I had to decide which to use...

@bill93 I commend your efforts to provide ellipsoid heights on bench marks. Too bad the effort is not more universally recognized as useful.?ÿ GNSS ...

Go to Matlab help. Here's the link for help on installing the wavelet toolbox:

@jitterboogie If you interested in a comprehensive though anecdotal history of gravity measurement, you might enjoy ƒ??The Hunt for Earth Gravityƒ? ...

Points in the NGS database having NAD27 positions will have those positions shown in the ƒ??Supersededƒ? section of the pointƒ??s datasheet. Trying ...

@jitterboogie My involvement in gravity observation hardly made me a ƒ??gravity person.ƒ? Sorry if I left that impression. I made intermittent, limi...

In an unchanging world with perfect data and modeling maybe you could approach your goal. More so over a small area. For information about how and wh...

@jitterboogie Meters have certainly improved. Shown below (from left) is a LaCoste-Romberg Model-G, a Scintrex CG-5, the Micro-g LaCoste FG5 and A10 ...

@gene-kooper i should have followed your link before posting. I usually see the graphic associated with mine. I thought it was not a direct link. I ...

Or try this direct link/p> ?ÿ

A good graphic showing the relationship of ECEF (XYZ) and latitude, longitude and ellipsoid height. This site allows you to do the transformations. Si...

@sadiq-muhammed ECEF coordinates are 3D Cartesian coordinates whose [0;0;0] XYZ coordinates are with respect to the center of Earth mass.?ÿ A latitu...

I only intended to point out that the origin of the coordinates shown (actually vector components) were not Earth Centered Earth Fixed.?ÿ pedanticall...

@rover83 definitely Cartesian definitely NOT ECEF (look at magnitudes). Snark over...