GNSS Raw Data

What is GNSS raw data?

The so called GNSS raw data is generated by the tracking engine and includes measurements for each tracked satellite. It is a copy of the measurements that the receiver’s main navigation task uses internally.

GNSS raw data levels

u-blox has defined two different raw data level as shown in the table below.

	Basic raw data	Full raw data
GNSS raw data output	Code phase	Carrier phase
Supported UBX messages	UBX-RXM-SFRBX RXM-MEASX	UBX-RXM-SFRBX RXM-MEASX RXM-RAWX
RAW data elements	Satellite Information Code Phase [ms] Doppler [m/s, Hz]	Satellite Information Code Phase [ms] Doppler [m/s, Hz] Pseudoranges [m] Carrier phase [cycles]

Typical application examples

• Data recording for post-processed kinematic (PPK) calculations
• A secondary output for additional external sensors fusion
• A secondary output for cloud map generation or update

Available products

Basic raw data is available on all GNSS receivers based on u-blox M8 and later platforms.
Full raw data is only available on specific GNSS receivers as shown in the table below:

	Chips	Modules	EVKs
u-blox M8		NEO-M8P	C94-M8P
		NEO-M8T      LEA-M8T	EVK-M8T
u-blox M9	UBX-M9140-KA-DR	NEO-M9L-01A	EVK-M9DR
u-blox M10	UBX-M10050-KB-RW	MIA-M10Q-01B	EVK-M101
u-blox F9		NEO-F9P ZED-F9P	EVK-F9P C099-F9P
		ZED-F9R	C102-F9R EVK-F9DR
		ZED-F9T      LEA-F9T	EVK-F9T RCB-F9T
u-blox F10	UBX-F10050-KB-RW	NEO-F10N-00B-20	EVK-F10N
		NEO-F10T	EVK-F10T
u-blox X20		ZED-X20P	EVK-X20P