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Optimizing schedules for the VLBI global observing system.

Matthias Schartner1, Johannes Böhm1

  • 1Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.

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|January 28, 2020
PubMed
Summary
This summary is machine-generated.

Optimizing Very Long Baseline Interferometry Global Observing System (VGOS) schedules with VieSched++ software is crucial. Weight factors significantly impact geodetic precision, making their careful selection key for improved results.

Keywords:
IVSScheduling of the VLBI observationsVLBI global observing system (VGOS)Very long baseline interferometry (VLBI)VieSched++Vienna VLBI and satellite software (VieVS)

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Area of Science:

  • Geodesy
  • Astronomy
  • Computer Science

Background:

  • Very Long Baseline Interferometry (VLBI) scheduling is a complex optimization challenge.
  • The new VLBI Global Observing System (VGOS) features smaller, faster-slewing antennas, presenting new scheduling opportunities.
  • Existing scheduling metrics may not fully capture the quality of VGOS schedules.

Purpose of the Study:

  • To provide deep insights into optimized VGOS scheduling using VieSched++ software.
  • To analyze the impact of different scheduling parameters and approaches on geodetic result precision.
  • To identify the most critical parameters for optimizing VGOS schedules.

Main Methods:

  • Development and application of the VieSched++ VLBI scheduling software.
  • Generation and analysis of over one thousand schedules and one million simulated sessions.
  • Large-scale Monte Carlo simulations to evaluate schedule quality and geodetic parameter precision.

Main Results:

  • Weight factors are identified as the most critical parameters for optimizing VGOS schedules.
  • Proper selection of individually optimized weight factors significantly improves schedule quality.
  • A strong correlation exists between weight factor values and the expected precision of geodetic parameters.

Conclusions:

  • Optimized weight factors are essential for high-precision geodetic results in VGOS scheduling.
  • Large-scale Monte Carlo simulations offer a superior method for schedule evaluation compared to traditional statistics.
  • VieSched++ enables significant improvements in VGOS scheduling by focusing on optimized weight factors.