KAPPA Arc V5 — GFS κ Validation Dataset (Paper 4)

Raw JSON validation files supporting the manuscript: "Real-Time Atmospheric Refraction Correction Using GFS Numerical Weather Prediction: Zero-Lag κ Computation for Operational Geodetic Applications" by Khalid Zafer Ahmed Alkalali (Geodesy and Geodynamics, under review, 2026). Files included: gfs_validation.json — 25 quality GFS κ comparisons against IGRA2 radiosonde reference across 4 tropical stations (Pohnpei, San Juan, Singapore, Guam), 22 dates, 16 May – 6 June 2026 gfs_validation_v2.json — 26 quality GFS κ comparisons, expanded run including Nottingham (1 entry, duplicate of nottingham_gfs.json 2026-06-01) nottingham_gfs.json — 6 quality GFS κ comparisons at Nottingham (UK), dedicated altitude-corrected run saudi_gfs_validation.json — 90 GFS vs ERA5 κ comparisons across 5 locations in the RCD_PLO survey region, Kingdom of Saudi Arabia These files are the primary data underlying Tables 3 and 4 and Supplementary Sections S2–S4 of the manuscript. The Pearson r = 0.916 reported in Section 4.3 is computed from the matched POOR cases in gfs_validation.json.