If you look at the RTX output posted you will see a height indicated to be orthometric and determined using EGM96. The original poster reports it diff...

I know nothing about Trimble RTX. Looking at the screen capture above reveals that it transforms the ellipsoid height via the Earth Gravity Model 96 (...

I hope your training class included providing you the following manuals that I consider very good.?ÿ

For a more comprehensive treatment of celestial navigation, I recommend?/p> The American Practical Navigator is a free PDF at the site above. Start Ch...

Not familiar with your location, intended accuracy or purpose. That said, I would heed Jim Stemƒ??s advice in:?/p> I copy the relevant page below:?ÿ

FWIW, There is an L3 frequency. It is 1381.05 MHz and is used as part of ?ÿNUDET. Not much good for navigation. You will notice that its frequency as ...

I, of course, failed in my oblique attempt to get those on this thread to think about how realistic the values in the original post and responses are....

While I am hesitant to involve myself in quibbles over thousandths of a foot when dealing with zenith angles and slope distances, I see neither of the...

While pruning my photo directory I came across this tabulation of the changes to WGS84. Not sure if it is up-to-date, this is not an NGA site. The pol...

WRT Mr Hamiltonƒ??s statement ƒ??...that they did not know the ellipsoid heights, they used the orthometric heights.ƒ? ?ÿThe horizontal datum NAD27 w...

For those unaware, the equation for the computation of the elevation factor (EF) is: R/ (R + h) where h is the ellipsoid height. In the US one uses NA...

At risk of being labeled a pedant, let me clarify that the scale factor (SF) does not require an elevation. It is a function of the location of the po...

This topic has a lot of past posts. You might want to do a site search. An important point is that ITRF/IGS and WGS84 are separately developed and mai...

I hope you are doing well and recovery will be underway soon.?ÿ As for the issue you raised. I note that the receiver users guide linked below: Addre...

First of all, I am a user (and a retired one at that) of receiver data and translators. Hopefully you will get good information from this site or the ...

I understand from your posting that the problem exists when using a RINEX file and not during file creation. If that is the case, I would regenerate t...

Masurement of the gravity gradient and the equipment used are described in the link below. gradient measurements weƒ??re part of the Geoid Slope Vali...