Assessing the performance of multi-GNSS precise point positioning technique on the geoid model validation

Simav M., BAHADUR B., Yıldız H., Cingöz A., NOHUTCU M., Sezen E.

Survey Review, cilt.56, sa.394, ss.51-64, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 56 Sayı: 394
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1080/00396265.2023.2167920
  • Dergi Adı: Survey Review
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Environment Index, Geobase, INSPEC
  • Sayfa Sayıları: ss.51-64
  • Anahtar Kelimeler: Precise point positioning, Baseline positioning, Multi-GNSS, Validation of geoid precision, GNSS-levelling, Turkiye
  • Hacettepe Üniversitesi Adresli: Evet

Özet

© 2023 Survey Review Ltd.This study aims to investigate the comparative performance of PPP technique in evaluating the precision of three distinct geoid models and to quantify the contribution of GLONASS constellation to GPS as well as the effect of observation length. We use recently and concurrently measured GNSS and levelling data crossing rough topography with steep geoid slope in Türkiye. The RMSE statistics about the mean of the geometric minus gravimetric geoid heights reveal that at least 4-hours of static data should be collected regardless of the constellation. We find out encouraging results with 8-hours of GPS + GLONASS solutions having RSME values of 3.0, 5.0 and 21.5 cm in validating national, globally combined and satellite-only geoid models, respectively. The multi-GNSS PPP processing with a relatively long observation period yields comparable results to relative positioning though the latter still performs slightly better.