Datasheet Teseo-LIV3R (STMicroelectronics) - 9

Teseo-LIV3R Augmentation systems 3 Augmentation systems 3.1 Satellite-Based augmentation system
Teseo-LIV3R supports SBAS. SBAS is a Wide Area Differential GPS (WADGPS). It is a system which provides differential GPS corrections data; SBAS includes the WAAS within the United States, the EGNOS within Europe, the Multifunctional Transport Satellite (MTSAT)–based MSAS within Japan and Southeast Asia, and the GPS and GEO Augmented Navigation (GAGAN) system in India. SBAS data correction is used in the GNSS algorithm to provide better position estimation. The overall SBAS differential correction mechanism can be conceived and built in 2 phases: The “Acquire and Tracking” phase The “Decoding” phase The “Acquire and Track” phase relates to the capacity of the acquisition engine to reliably track the configured SBAS satellite; during decoding phase the SBAS message can be decoded to fetch the differential corrections. The current longitude limits for each service are: WAAS -180 to -25 degrees EGNOS -25 degrees to +50 degrees GAGAN +50 degrees to +100 degrees MSAS +100 degrees to +180 degrees The Teseo-LIV3R software with SBAS capability implements a command interface at the NMEA level to allow interaction with the SBAS library. It supports commands to enable/disable the SBAS functionality.
3.2 QZSS
The Quasi-Zenith Satellite System (QZSS) is a Japanese regional communication service and positioning information for the mobile environment in the GPS L1C/A band. QZSS in conjunction with GPS signals provides GNSS augmentation service for the Pacific region covering Japan and Australia. QZSS satellites are placed in a periodic Highly Elliptical Orbit (HEO): these orbits allow the satellites to “dwell” for more than 12 hours a day at an elevation above 70° (it means that they appear almost overhead most of the time).
3.3 Differential GPS
Teseo-LIV3R supports Differential-GPS data according to RTCM (Radio Technical Commission for Maritime Services) 2.3. Differential-GPS data improves position accuracy. Teseo-LIV3R supports the following RTCM messages. DS12821 Rev 2 9/30 29 Document Outline Table 1. Device summary 1 General description 1.1 GNSS performance Table 2. GNSS performance 1.2 Block diagram Figure 1. Teseo-LIV3R block schematic 1.3 Pin configuration Figure 2. Teseo-LIV3R pin layout 1.4 Pin out description Table 3. Teseo-LIV3R pin out description 2 Supported GNSS constellations 2.1 GPS 2.2 GLONASS 2.3 BeiDou 3 Augmentation systems 3.1 Satellite-Based augmentation system 3.2 QZSS 3.3 Differential GPS Table 4. Supported RTCM message on Teseo-LIV3R 4 Assisted GNSS 4.1 RealTime AGNSS 5 Clock generation 5.1 Temperature-Compensated Crystal Oscillator (TCXO) 5.2 Real Time Clock (RTC) 6 I/O interfaces 6.1 UART 6.2 I2C 7 FW configuration 8 Power mode 8.1 Hardware standby 8.2 Software standby 9 Geofencing 10 Odometer 11 Regulatory compliance 11.1 CE certification for Teseo-LIV3R Figure 3. CE marking 12 Electrical characteristics 12.1 Parameter conditions 12.2 Minimum and maximum values 12.3 Typical values 12.4 Absolute maximum ratings Table 5. Voltage characteristics Table 6. Thermal characteristics Table 7. Power consumption 12.5 Recommended DC operating conditions Table 8. Recommended DC operating conditions 13 Mechanical specifications Figure 4. Teseo-LIV3R mechanical specification 14 Shipping information 14.1 Reels Figure 5. Carrier tape Figure 6. Teseo-LIV3R orientation Figure 7. Cover tape Figure 8. Plastic reel Figure 9. PB band 14.2 Packing cartons for reels 14.3 ESD handling precautions 14.4 Moisture sensitivity levels 15 Labeling information Figure 10. Labeling information of Teseo-LIV3R Table 9. Labeling information description 16 Reflow soldering profile Table 10. Soldering profile values Figure 11. Soldering profiles 17 ECOPACK® Appendix A Reference document Revision history Table 11. Revision history