Geodetic Class GPS Receiver as a Standard for Time-Critical Applications

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XX IMEKO World Congress, 9-14 September 2012, Busan, Republic of Corea

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Geodetic Class GPS Receiver as a Standard for Time-Critical Applications

  1. 1. GEODETIC CLASS GPS RECEIVER AS A STANDARD FOR TIME- CRITICAL APPLICATIONS Vukan Ogrizovic1 Jadranka Marendic2 Snezana Renovica2 Sinisa Delcev1 Jelena Gucevic1 1 University of Belgrade, Faculty of Civil Engineering, Department of Geodesy and Geoinformatics, Belgrade, Serbia 2 Directorate of Measures and Precious Metals, Belgrade, Serbia
  2. 2. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea The scope  Civil Engineering, Geodesy and Geoinformatics  Geodetic astronomy  Time-keeping  time synchronization  comparing local clock with UTC  GPS, NTP,...  Metrological laboratory for angle and length calibration (ML160) 2/11
  3. 3. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Device under test  ML160 time standard  Geodetic class L1/L2 receiver  part of Serbian CORS network  1PPS BNC output 3/11
  4. 4. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Equipment No Measuring equipment Remarks Name Type Manufacturer S/N 1 TIC CNT- Pendulum 914858 90 2 NetRS 6609/ Trimble 914647 Opt 70 021 3 Digital clock CADM Rohde- 99.6014.02 Schwartz 4 Oscillo- scope 4/11
  5. 5. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Experiment set-up 5/11
  6. 6. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Phase-time diagram 6/11
  7. 7. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Cycle slip resolution  Sudden jump in GPS integrated phase measurements  Decreases PVT solution  16 cycle slips during 24 hours  No correlation with phase-time outliers 7/11
  8. 8. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea AVAR values 8/11
  9. 9. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea AVAR from raw GPS data 9/11
  10. 10. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Conclusion and remarks  Permanent ms accuracy of time-marks  Convenient for permanent monitoring of industrial processes  Microsecond accuracy (astrometry, etc.)?  not reliable  could degrade positional accuracy  To discipline GPS with a rubidium clock 10/11
  11. 11. XX IMEKO World Congress, 9-14. September 2012, BEXCO, Busan, Republic of Corea Thank you Vukan Ogrizovic, vukan@grf.bg.ac.rs Jadranka Marendic, marendic@dmdm.rs Snezana Renovica, renovica@dmdm.rs Sinisa Delcev, delcev@grf.bg.ac.rs Jelena Gucevic, jgucevic@grf.bg.ac.rs The work on this paper is supported by the Ministry of Education and Science of the Republic of Serbia (Project of technological development TR-36048) 11/11

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