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Sökning: WFRF:(Neyezhmakov P.)

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1.
  • Pollinger, F., et al. (författare)
  • The European GeoMetre project : developing enhanced large-scale dimensional metrology for geodesy
  • 2023
  • Ingår i: Applied Geomatics. - : Springer Science and Business Media Deutschland GmbH. - 1866-9298 .- 1866-928X. ; 15:2, s. 371-381
  • Tidskriftsartikel (refereegranskat)abstract
    • We provide a survey on the joint European research project “GeoMetre”, which explores novel technologies and their inclusion to existing surveying strategies to improve the traceability of geodetic reference frames to the SI definition of the metre. This work includes the development of novel distance meters with a range of up to 5 km, the realisation of optical multilateration systems for large structure monitoring at an operation distance of 50 m and beyond, and a novel strategy for GNSS-based distance determination. Different methods for refractivity compensation, based on classical sensors, on dispersion, on spectroscopic thermometry, and on the speed of sound to reduce the meteorological uncertainties in precise distance measurements, are developed further and characterised. These systems are validated at and applied to the novel European standard baseline EURO5000 at the Pieniny Kippen Belt, Poland, which was completely refurbished and intensely studied in this project. We use our novel instruments for a reduced uncertainty of the scale in the surveillance networks solutions for local tie measurements at space-geodetic co-location stations. We also investigate novel approaches like close-range photogrammetry to reference point determination of space-geodetic telescopes. Finally, we also investigate the inclusion of the local gravity field to consider the deviations of the vertical in the data analysis and to reduce the uncertainty of coordinate transformations in this complex problem. 
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2.
  • Pollinger, F., et al. (författare)
  • Metrology for long distance surveying : A joint attempt to improve traceability of long distance measurements
  • 2016
  • Ingår i: IAG 150 Years. - Cham : Springer International Publishing. - 9783319246031 ; , s. 651-656
  • Konferensbidrag (refereegranskat)abstract
    • Based on the current state of technology, distance measurements over a few hundred metres in air with relative uncertainties significantly better than 10_6 are still an almost impossible challenge. In the European Joint Research Project (JRP) “Metrology for long distance surveying” measurement uncertainties in GNSS-based and optical distance metrology are going to be thoroughly investigated, novel technologies and primary standards developed and guidelines to improve surveying practice in the field worked out. A better understanding and a decrease of measurement uncertainty is also targeted for the critical local tie measurement at geodetic fundamental stations.
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