![]() Then, the calculated experimental geoid models were validated using historical and recently measured profile-based GPS/leveling datasets, and they were also compared with the official solutions submitted by different institutions for the “1-cm geoid experiment” of IAG JWG 2.2.2. The computations using each formula were carried out using ITU-GRG software, including the solution variants based on terrestrial-only, airborne-only and combined gravity datasets. This contribution mainly focused on modeling the Colorado geoid using the least squares modifications of Stokes and Hotine integral formulas with additive corrections. In this frame, this article aims providing a discussion on Colorado geoid modeling through individual experimental results obtained by Istanbul Technical University-Gravity Research Group (ITU-GRG). The dataset was provided by National Geodetic Survey (NGS) department. The dataset included the terrestrial and airborne gravity observations, a digital terrain model, the XGM2016 global geopotential model and GPS/leveling data for model validations belonging to a mountainous area of approximately 550 km × 730 km in Colorado, US. The aim of this experiment was to clarify the repeatability of gravity potential values as International Height Reference System (IHRS) coordinates from different geoid determination approaches carried out with the same input dataset. 2021 Oct 04: : NETCDF-Fortran Version 3.6.The Colorado geoid experiment was initiated and organized as a joint study by the Joint Working Group (JWG) 2.2.2 (1-cm geoid experiment) of the International Association of Geodesy (IAG) in 2017, and different institutions and research groups contributed to this study.2021 Oct 20: : NetCDF CF Conventions Issue,.2021 Oct 11: : NetCDF CF Conventions Issue,.2021 Oct 11: : having problem generating static.2021 Oct 12: : NC_64BIT_DATA undeclared error,.2021 Oct 13: : Precompiled netCDF binaries,.2021 Oct 20: : Building NetCDF Fortran on Big Sur,.2021 Oct 22: : When installing netcdf-fortran-4.5.3 nf_netcdf4,.2021 Oct 26: : FW: Need assistance - USCG-SAR netCDF particle files,.2021 Oct 29: : Precompiled WIN32 netcdf-fortran libraries,.2021 Nov 01: : bugs in netcdf-fortran,.2021 Nov 17: : Configure error cannot compute sizeof (off_t),.2022 Jan 12: : NEXRAD Data Decoder using NetCDF,.2021 Dec 02: : NEXRAD Data Decoder using NetCDF,.2021 Dec 06: : NetCDF-Fortran: nf and nf03_test FAIL,.2021 Dec 06: : error netcdf-fortran configure cannot compute sizeof (off_t),.2021 Dec 20: : Request for help in understanding and solving an error,.2021 Dec 21: : configuration error on NERSC perlmutter,.2021 Dec 21: : compiler cannot find fortran 77 netcdf codes,.2022 Jan 11: : netCDF sources not available over FTP,.2022 Jan 11: : Error (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e')),.2022 Feb 08: : netcdf-c version 4.7.4 or greater is required,.2022 Feb 08: : how to solve "configure: error: C compiler cannot create executables See `config.log' for more details" during netcdf-c library installation,.2022 Feb 16: : netcdf-fortran configuration error,.2022 Mar 29: : Help with NetCDF file with Lat/Lon as variables, not as cordinates!,.2022 Mar 29: : Issues with installing netcdf-c-4.8.1,.2022 Mar 29: : nf90 number of Global Attributes,.2022 Apr 01: : Compile failure at nf03_test.F,.2022 Apr 07: : Problem with C++ support,.2022 Apr 21: : Mixing F90 and F77 Function Calls,.2022 Apr 21: : question about netcdf c++ example,.2022 Apr 28: : mpiifort make check NETCDF-fortran-4.5.2 but FAIL f03test tst03_f77_v2 nf03_test,.2022 May 10: : fortran build needed for active flight project - 2nd email,.2022 May 11: : NetCDF to GEOTIFF with MATLAB,.2022 May 12: : Help with NetCDF Visual Studio and INTEL fortran,.2022 May 31: : Request for support to install NetCDF Fortran libraries on window platform,.2022 Jun 21: : error: Can't find or link to the hdf5 library.,.2022 Jul 25: : netCDF-C 4.9.0 fails check on Mac Studio M1 Max,.2022 Aug 08: : netCDF text attribute question,.2022 Aug 16: : Variable length strings example,.2022 Aug 30: : Configure error : C compiler can not create executables,.2022 Aug 31: : Help with compiling/installing netcdf-fortran-4.6.0,.2022 Sep 01: : Make-check failed, with the Makefile item set giving the log files, as attached,.
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