1 / 16

Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint

Dr Xiaoying Kong University of Technologies, Sydney. Australia Dr Li Liu The University of Sydney, Australia Dr Tich Phuoc Tran University of Technologies, Sydney. Australia. Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint.

opal
Download Presentation

Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dr Xiaoying KongUniversity of Technologies, Sydney. AustraliaDr Li LiuThe University of Sydney, AustraliaDr Tich Phuoc TranUniversity of Technologies, Sydney. Australia Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint The 16th Asia-Pacific Conference on Communications 31 Oct. - 3 Nov. 2010, Auckland, New Zealand Page 1

  2. Global Navigation Satellite Systems (GNSS) • Global Navigation Satellite Systems • Positioning, navigation, & timing data • Global Positioning System (GPS) • Russian - GLONASS • European Union- Galileo satellite system • China - Beidou • Japan - Quasi-Zenith Satellite System (QZSS) APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 2

  3. GNSS Errors • Global Navigation Satellite Systems provide services to global end users with high quality positioning data but with errors. • Selective availability (SA), satellite ephemeris errors, satellite geometry, multipath effect, atmospheric effects, clock inaccuracies, … APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 3

  4. DGPS, WAAS- improving positioning accuracy • Differential GPS (DGPS) • uses fixed ground stations to correct stand-alone GPS. • Wide Area Augmentation System (WAAS) • consists of ground stations and reference stations, which collect, calculate and transmit correction data • When fixed ground station signals are unavailable • Land navigations, air navigations and robot positioning need to rely on stand-alone GPS APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 4

  5. improving positioning accuracy • Most efforts • understanding the characteristics of GPS error sources • modelingmultipath effects • modelingionospheric effects • … • “white-box approach” ???? APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 5

  6. improving positioning accuracy • Our approach • “Black-box approach” • End user’s view point input output input output APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 6

  7. Black box model- our approach APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 7

  8. 2 phases - our approach • Configuration I Positioning error modeling Using PSD Positioning error de-correlation • Configuration II 2010 2000 APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 8

  9. Phase I - Error models • Configuration I • Configuration II APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 9

  10. Phase II – de-correlation • Aiding sensor – inertial measurement sensors • Integrated positioning system • Configuration I • Shaping filter APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 10

  11. Model - Configuration I • Process model A • Observation model Xiaoying Kong UTS:FEIT:CRIN Page 11

  12. Phase II – de-correlation • Configuration II • Shaping filter APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 12

  13. Model - Configuration II • Process model A • Observation model H Xiaoying Kong UTS:FEIT:CRIN Page 13

  14. Phase II – de-correlation • Configuration II frequency domain time domain APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 14

  15. Conclusions • Black box approach, from end user’s view point • Investigate the external behaviors • No efforts on modeling many individual error sources and receiver noises • Accuracy improved • Can be applied in the situations • when satellite configurations and receiver change APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 15

  16. Thank you Questions? APCC 2010 Modeling Satellite Positioning Errors in Different Configurations from End User's Viewpoint Page 16

More Related