Trimble GNSS Infrastructure

Transcription

1 Trimble GNSS Infrastructure

2 A History of Innovation Trimble, the first company to offer commercial GPS products company to integrate GPS with communications technology RTK system in the market in 1994 company to provide integrated GPS and mapping software capability for mobile phones company to offer the full range GPS equipment tracking all available signals GPS (L1, L2, L2C, L5*) GLONASS (L1, L2)

3 Positioning Applications Construction Surveying GIS In-vehicle Navigation Infrastructure Agriculture Wireless Infrastructure Asset & Fleet Management Portable Devices

4 Accuracies Single/Multi Station Systems for RTK Trimble VRS Technology (RTK / DGPS)

5 Single Station RTK RTK corrections

6 Limitations of single base RTK Local base station NO integrity monitoring Productivity loss Security Communications Power Supply PPM

7 Systematic Errors Ionosphere Troposphere Satellite Orbit Errors Satellite Clock Errors Multipath

8 Trimble Infrastructure Portfolio (Software) Scalable Approach Trimble VRS GPSNet GPSBase

9 Trimble VRS Technology

10 Applications for Trimble VRS Cadastral Surveying GIS - Mapping Dam - Monitoring Large Construction Areas Agriculture Precise Farming Hydrographic Surveying Machine Control - Navigation Road Railway Construction Utility Companies Marine Applications

11 Trimble VRS how does it work?

12 NTRIP Central User Field Permanent GNSS Rover in user Caster server Data the operates field is communicates computes makes provides receives Reference streamed with enhanced realtime Stations LAN efficiency GPSNet. list via of with correction connection available data Internet data. receive to and GPSNet model NTRIP User corrected GNSS links quality selects to server for signals provides control. central for the custom area via mountpoint local 24/7 processing wireless solution for Internet atmospheric server users location conditions.

13 Requirements for Trimble VRS Accuracy for the User in the field Based on standards Reliability!!! Running 24/7 (Hardware & Software) Providing Network Information Alarm System Report System Backup System Backup Data Line User / Data Security

14 11 year solar cycle, observed number of sunspots

15 11 year solar cycle, predicted number of sunspots rough times are coming up soon again

16 A global VTEC map, calm ionosphere Vertical Total Electron Content on a global map, as derived from GPS base station observations

17 Trimble Zephyr Geodetic Trimble Zephyr Geodetic Model 2 Stealth Technology

18 Phase Center Stability

19 Trimble Zephyr Geodetic Model 2 Tracking capability GPS: L1/L2/L2C/L5 (when available) GLONASS: L1/L2 Galileo E1, E5A, E5B, and E6 (when available)

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21 Rover Integrity / Rover Monitor

22 Coordinate Monitoring

23 Reports and Alarm System

24 Benefits of VRS Networking Less investment for the user Significantly reduces systematic errors Extended operating range with improved initialization and accuracy Increased productivity Autonomous surveying

25 Benefits of VRS Networking Provides integrity monitoring Provides alarm monitoring system Uses established communications VRS for post-processing All users in common, established coordinate frame

26 Trimble VRS Support Worldwide AM POC POC Europe ROW Customer Issues Knowledge Base POC

27 Why Use the Internet in the Field? Connected Site Download data to the field while you survey No more returning to office for forgotten coordinates More productivity Future is bi-directional communications

28 Survey Controller The World of Wireless Internet GPRS theory Up to 4 links to the network Each link capable of up to 13.4 Kps Highly unlikely to achieve this Voice transmissions share the same channels Voice has priority Bandwidth available is constantly changing Poorer signal reception=smaller bandwidth

29 Survey Controller - GPRS Limitations Up to 4 links with one dialup 13.4 Kps each Depends on number of users Voice is priority Could lose links and have lower bandwidth Areas of poor coverage Why not use VPN or HTTPS streams for GPRS? Doing this provides processing overheads and latency resulting in reduced bandwidth Potential for the future (UMTS)

30 Survey Controller RTK on Demand example Data flow differences RTK on demand KB Without RTK on demand Using RTK on demand Time (minutes)

31 Survey Controller RTK on Demand example Bandwidth usage/availability Bandwidth max available bandwidth CMR+ 12 svs

32 Security Trends In Mobile Data Communications Often they will not allow remote access to the device Mobile phone technology advances and becomes more powerful, threats from viruses and hackers increase This is a huge problem for our kind of application

33 Thank you!