NMEA
Proprietary Sentences
A number of chipset manufacturers can output proprietary NMEA sentences:
- $PGLOR - Broadcom - e.g. BCM4774 / BCM4775 / BCM4776
- $PGRM - Garmin
- $PJL - Jackson Labs
- $PQ - Broadcom - e.g. BCM47755 in Quectel LC79D module
- $PSAM - Samsung - e.g. Samsung Exynos 1280 / 1380 in Galaxy A53 / A54
- $PSMSG - Qualcomm - e.g. SDM845 in Samsung Galaxy S10 Lite
- $PSRF - SiRF - e.g. Star II / III / IV / V
- $PSSGR - Broadcom - e.g. BCM4776 in Google Pixel 7
- $PUBX - u-blox
A number of these vendors produce vendor specific accuracy estimates.