Data and code release: Ultra-Precise Null Result for Sidereal Clock Anisotropy in 2025 IGS 30-Second Data: Upper Limit < 10−14 s

Public data release accompanying the paper "Ultra-Precise Null Result for Sidereal Clock Anisotropy in 2025 IGS 30-Second Data: Upper Limit < 10−14 s" (Frederick Manfredi, 2025). We analysed batches of five and eight daily rapid clock solutions (DOY 339–346, 2025) from the COD and WUM analysis centres, containing AR-type receiver clock offsets at 30-second cadence. East–West differences were formed after aligning epochs to the nearest 30 seconds. The spurious >10¹³ σ signal appears only when combining data from multiple days due to coherent common-mode drift in the IGS time scale. When analyzed separately, each subset yields a clean null result — confirming the artifactual origin of the large signal. Files: - 2025_ground_clocks.csv : Processed 1D 30s data. Only first 5 files of ground station data here, for more update SEMI_DIRAC_2025_IGS.py - SEMI_DIRAC_2025_IGS.py : Run this script to download All 1D 2025 IGS Data - semi_dirac_gps_sideral_stack.py : Run this script vary the comment to 5 or 8 → reproduces the figures - null_5files.png : 0 sigma Publication-ready figure - spurious_8files.png : spurious sigma Publication-ready figure- CLK 30S 1D files : Pulled from ftp://igs.ign.fr/pub/igs/products/2395/