Greg Troxel

Thanks for explaining P90/PE90. I didn't realize people used PE-90 as an Anglicization for PZ-90. But, I think that's (in modern realizations) now close to ITRF2008 or similar, and thus...

I asked a friend to check Pixel 5 output, and the DTM string matches the example above exactly (same offsets, and same checksum). The Pixel 5 is reporting a geoid...

I agree that your data shows that h is reasonable for the 765 chipset, and that N and H are both wrong. Surely the receiver is computing XYZ and then...

It's also an interesting question about the bad N over space. I have a data point that a Pixel 5 near Boston has the mildly-wrong N, and you have one...

Android seems pretty firmly in the land of WGS84, so while NGS's new geoids and the new 2022 datums are very interesting, the defintion of right in Android is EGM2008...

More or less, I think it's obvious that a (navigation-type) GPS receiver should natively operate in WGS84. WGS84 incorporates by reference a gravity model, currently EGM2008, as the definition of...

Thanks for filing. That ticket can't be read without a google account. I did read the linked ticket, and I don't follow if you are suggesting this be added to...

@vkbellis Yes, your A71 is strange. But I think almost all of the probability is on "your device is buggy" and very little is on "it is a somehow non-buggy...

See also - https://www.ngs.noaa.gov/PUBS_LIB/EGM96_GEOID_PAPER/egm96_geoid_paper.html - https://en.wikipedia.org/wiki/Geopotential

@barbeau Great that you got a response. I have seen -33.1 around me, and my impression is that rounding is to 0.1m (which given everything else is not crazy). I...