Data Sheet

SAM-M8Q - Data Sheet
UBX-16012619 - R04 Production Information Functional description
Page 9 of 25
 No connectivity required
 Compatible with AssistNow Online and Offline (can work stand-alone, or in tandem with these services)
 No integration effort; calculations are done in the background, transparent to the user.
The u-blox ROM-based SAM-M8Q receiver can use AssistNow Autonomous to calculate GPS only orbit
predictions for 3 days.
For more details on A-GNSS, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification [2].
1.7 Augmentation Systems
1.7.1 Satellite-Based Augmentation System (SBAS)
The u-blox SAM-M8Q GNSS patch antenna module supports reception of SBAS broadcast signals. These systems
supplement GNSS data with additional regional or wide area GPS augmentation data. The system broadcasts
range correction and integrity information via satellite which can be used by GNSS receivers to improve the
resulting precision. SBAS satellites can be used as additional satellites for ranging (navigation), further enhancing
availability. The following SBAS types are supported: GAGAN, WAAS, EGNOS and MSAS.
For more details see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2].
1.7.2 QZSS
The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system that transmits additional GPS L1
C/A signals for the Pacific region covering Japan and Australia. SAM-M8Q GNSS patch antenna modules are able
to receive and track these signals concurrently with GPS signals, resulting in better availability especially under
challenging signal conditions, e.g. in urban canyons. The L1- SAIF signal provided by QZSS can be enabled for
reception via a GNSS configuration message.
1.7.3 IMES
The Japanese Indoor MEssaging System (IMES) system is used for indoor position reporting using low-power
transmitters which broadcast a GPS–like signal. SAM-M8Q GNSS patch antenna module can be configured to
receive and demodulate the signal to provide an in-door location estimate.
This service is authorized and available only in Japan.
IMES reception is disabled by default.
1.7.4 Differential GPS (D-GPS)
u-blox receivers support Differential-GPS (D-GPS) data according to RTCM specification 10402.3 [4]: The use of
D-GPS improves GPS position accuracy. The RTCM implementation supports the following RTCM 2.3 messages.
Message Type
Description
1
Differential GPS Corrections
2
Delta Differential GPS Corrections
3
GPS Reference Station Parameters
9
GPS Partial Correction Set
Table 3: Supported RTCM 2.3 messages
RTCM corrections cannot be used together with SBAS.
For more details see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2].
1.8 Broadcast navigation data and satellite signal measurements
The SAM-M8Q GNSS patch antenna module can output all the GNSS broadcast data upon reception from
tracked satellites. This includes all the supported GNSS signals plus the augmentation services SBAS, QZSS and