Position Streaming Emlid RS2+ HEIGHT


if I make a stream USB to PC with the settings LLH I get the ellipsoid Height, it is correct. Than I get the hight: 284,28m → correct

If I change settings to NMEA with GGA string output, I get the output hight from 236,95m → incorrect

in Project we have set ellipsoid hight. but it doesnt matter. It change nothing.
Where is the mistake?

Can somebody help us?



Maybe NMEA GGA is applying the GEOID height seperation?


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Yes I think that, too. But which kind of geoid hight, or which geoid?. The differnce between original point hight an calculated point hight in position streaming is 44cm. We have to know which kind of geoid is fundamentaled or fixed by nmea gga output, or how we can change it?

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Hi @geoings.schroeder,

Welcome to our community!

We use the EGM96 (1 x 1 deg grid) geoid for NMEA GGA. NMEA GGA message includes orthometric heights and geoid undulation in relation to EGM96. There is no way to change the geoid here, but you can transform the elevation values in third-party software.


Thank you very much, this is the info I needed.


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