Description: The ColFFTWG2020 quasi-geoid model is a gravimetric model and has been computed by the Laboratory of Gravity Field Research and Applications, Aristotle University of Thessaloniki. The model has been computed in the frame of the International Association of Geodesy Joint Working Group 2.2.2 "The 1 cm geoid experiment" and the so called "Colorado experiment". The area covered by the models is 108.5°E ≤ longitude ≤ 103.5°E, 36.5°N ≤ latitude ≤ 38°N with a grid spacing of 2' in both latitude and in longitude. The computation is based on the remove-compute-restore technique with XGM2106 being used as a reference field. The topographic effects were treated using a Residual Terrain Correction (RTC) by solving the spectral filter problem of RTC using Earth2014 and ERTM2160 models. The input gravity data include terrestrial and airborne data combined using Least-Squares Collocation (LSC). The final estimation was carried out using 1D FFT with Wong-Gore modification of the Stokes kernel. The accuracy of the model, when compared against GSVS17 GPS/leveling, is at 2.5 cm level. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
Global identifier:
Doi(
"10.5880/isg.2020.004",
)
Origins: /Wissenschaft/GFZ
Tags: Geografische Koordinaten ? Filter ? Daten ? Geodäsie ? Modellversuch ? Rückstand ? Colorado experiment ? EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS ? EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY ? Fast Fourier Transform ? Geoid model ? ISG ? Wong-Gore Stokes kernel modification ?
License: cc-by/4.0
Language: Englisch/English
Issued: 2020-01-01
Time ranges: 2020-01-01 - 2020-01-01
Accessed 2 times.