vkbellis

As you've noted here Greg, the issue of odd geoid models is not limited to one particular OEM or one particular model. On an old Moto E4 Plus, MediaTek MT6737...

@barbeau Thank you for posting the snippet (above). There are some NMEA sentences with extraneous information after the checksum; i.e., * 2-charater hexadecimal, for example, ` $GNDTM,P90,,0.000021,S,0.000002,E,0.989,W84*57,,,,,,,,,,,, ` ` $GNGNS,181842,2804.275596,N,8225.599397,W,AAANNN,20,0.5,9.2,-24,,,V*1F,,,,,,,...

@gdt - PZ-90/ PE-90 is indeed an interesting discovery as being QCOM's assigned Local Datum as revealed through the DTM sentence. And I also agree, QCOM's choice of geoid model...

@gdt - You're correct, gravity varies widely from place to place, nearly 200 meters across the planet: [Hipsometric Coversation.pdf](https://github.com/barbeau/gpstest/files/6677320/Hipsometric.Coversation.pdf) Here in the USA, the newest and purely gravimetric geoid model...

@gdt - Why do you say Earth Geopotential Model 2008 is the gravity model being used and why do you think this is defined by the OS? Also, would you...

@gdt - I agree, that in theory and at present, the EGM2008 model is implicit when when speaking in general about WGS84; however, my very limited dataset from tests on...

Any ideas as to what is meant by _GS_ referenced in "the several meters off on GS" ? We still don't know which gravity model that's being used by Qualcomm,...

@barbeau Thank you for considering my suggestion. 1. The Status_screen is one possibility, though there are other possibilities depending on how you want to handle displaying the statistical data including...

Please let us know when testing becomes available.

Makes sense to me :)