KAPPA Arc Master Validation Dataset — Papers 1–5

KAPPA Arc master validation dataset supporting the research series by Khalid Zafer Ahmed Alkalali, KAPPA Labs, Riyadh, Kingdom of Saudi Arabia. Covers Papers 1–5 submitted to Geodesy and Geodynamics (2026). Files included: - kappa_master_dataset.json: GFS tropical validation (n=25), GFS tropical+temperate (n=26), Nottingham run (n=6), Saudi GFS vs ERA5 (n=90), extended tropical radiosonde validation (n=24, mean gap 9.0%), ECMWF IFS 0.25° validation (n=36, mean gap 9.9%) - kappa_paper2_validation.json: Paper 2 supplementary validation tables — 41-path global three-point vs midpoint comparison, 16-station ERA5 vs radiosonde temperature (32 comparisons), dual gradient computation (41 paths), tropical radiosonde κ comparison (7 comparisons) - saudi_era5_rcdplo_validation.json: ERA5 κ computed at 5 Saudi Arabia levelling corridors across 9 RCD_PLO campaign dates (June–August 2012). Comparison reference: Al-Kherayef et al. (2018), FIG Congress Istanbul. - RCD_PLO_data_availability.txt: Data availability statement for the RCD_PLO national survey dataset. "Note: kappa_master_dataset.json contains all individual validation datasets embedded under the 'datasets' key, including gfs_validation, gfs_validation_v2, nottingham_gfs, saudi_gfs_validation, tropical_v6, and ifs_validation."