Re: DTM sentence and Russian datums in US phones (yes, that's clickbait!)

[Greg Troxel]

Greg Troxel <gdt@lexort.com> writes:

> Over at GPSTest (and Android program for telling you what your GNSS chip
> is doing), people report that some phones have strange elevations, and
> digging in there appear to be be two notable oddities:

Google actually commented on a bug and (per the GPSTest tracker):

>   geoid models that are wrong to a degree even more surprising than
>   u-blox's reporting of -33m when it should be -29m.

It seems the qualcomm chips have 10x10 degree geoid models due to "ROM
constraints".  My guess is further that it's EGM96, but that's me
guessing.

>   a DTM statement that says positions are in PZ-90, the grame used for
>   GLONASS.

In theory this will be fixed in the december update.

signature.asc
Description: PGP signature