Japan (JGEOID2019)
|
Authors: K. Matsuo, Y. Kuroishi
|
Created: 2019
|
Resp: Y. Sugawara
|
Description:
JGEOID2019 is an improved gravimetric geoid model for Japan developed by the Geospatial Information Authority of Japan. It covers the area of 20°N to 50°N and 120°E to 150°E with a grid spacing of 1 x 1.5 arc-minute. The geoid heights are referred to the GRS80 ellipsoid. It has been computed using a GOCE-based global geopotential model, GOCONS_GCF2_TIM_R6, surface (land and ship-borne) gravity data, and the SIO V28.1 altimetry-derived marine gravity model. The methodology for the geoid computation is based on Helmert's second condensation method with Faye gravity anomalies. The remove-compute-restore technique has been used with the hybrid Meissl-Molodensky modified spheroidal Stokes kernel (FEO kernel). Intercomparison with GNSS/levelling geoid undulations indicates that JGEOID2019 has an accuracy around 6 cm, which is about 2 cm improvement over the previous JGEOID2008 model.
Reference:
K. Matsuo, Y. Kuroishi (2020). Refinement of a gravimetric geoid model for Japan using GOCE and an updated regional gravity field model. Earth Planets Space, 72, 33. DOI: 10.1186/s40623-020-01158-6
|
|
