gps-wizard

OAO - “OnAndOn” Binary

GNSS Frames - 0x0AD4 and 0x0AD5

This format is generated by the Motion GPS (Mini, LCD and USB) and ESP-GPS.

The majority of the data originates from the NAV-PVT (navigation position velocity time solution) message.

OAO Name	Raw Name	Type	Name	Type	Units	Resolution
Latitude	latitude	<i4	lat	float64	deg	1 x 10-7
Longitude	longitude	<i4	lon	float64	deg	1 x 10-7
Altitude MSL	altitude_msl	<i4	ele	float64	m	1 x 10-3
Speed	speed	<u4	sog	float32	m/s	1 x 10-3
Course	course	<u4	cog	float32	deg	1 x 10-3
UTC Time	utc_time	<u8	ts	float64	s	1 x 10-3
Fix	fix	u1	fix	uint8	-	-
Satellites	satellites	u1	sat	uint8	-	-
Speed Accuracy	speed_accuracy	<u4	ehve	float32	m/s	1 x 10-3
Horizontal Accuracy	horizontal_accuracy	<u4	ehpe	float32	m	1 x 10-3
Vertical Accuracy	vertical_accuracy	<u4	evpe	float32	m	1 x 10-3
Heading Accuracy	heading_accuracy	<u4	ece	float32	deg	1 x 10-3
Horizontal DOP 1 2	hdop	<u2	hdop	float32	-	1 x 10-2

Notes:

1. Horizontal dilution of precision (HDOP) originates from the NAV-DOP message.
2. OAO files produced by the ESP-GPS record PDOP in the HDOP field.

TODO

Thoughts:

• Convert fix type from the ublox scheme (0, 1, 2, 3, 4, 5) to a standard scheme?

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