Summary
We report an empirical correction for long-baseline GNSS clock comparison with typical held-out RMS reduction around ~45%, and strict-window runs up to ~81%. Post-correction residuals are commonly in the 17–22 ns range. The effect has been observed across three independent analysis centers (IGS, CODE, ESA) and multiple years (2023–2025).
This document does not disclose the form, parameters, or implementation of the correction. It describes only the results and the validation protocol, suitable for blind pilot verification by an independent lab.
Evaluation frame (definitions only)
These definitions specify what is being measured and compared. They do not describe how the correction is computed.
- What is transformed: an agreed primary comparison or residual series from your submission—we return post-processed outputs and statistics; we do not disclose internal processing.
- Comparator: before = same stream and metric (typically RMS) before our post-process; after = identical metric on what we return.
- Improvement: percent reduction in that statistic; where we cite holdout, no refit on the evaluation window.
1. Domain and data
- Domain: Long-baseline GNSS clock comparison (final clock products).
- Data: Multi-baseline, multi-day comparison means (2023–2025).
- Scope: Effect appears across multiple analysis centers; not one AC only.
2. Main result
Typical held-out RMS reduction ~45%; strict-window runs up to ~81%; post-correction residuals commonly 17–22 ns.
30-day technical audit (IGS Final, strict holdout)
Single 30-day test window. Correction fitted on earlier 2024 data only; applied without refitting on this window.
| Metric | Uncorrected | Corrected | Improvement |
|---|---|---|---|
| Test window | 2024-250 to 2024-279 | 2024-250 to 2024-279 | — |
| RMS residual | 115.6 ns | 22.1 ns | 80.8% (strict-window) |
Audit note: No refit on the 30-day window. Patent pending (priority Feb 2026).
Note: No claim that remainder = 0 or universal applicability. Only observed effect sizes in tested configurations.
3. Validation protocol
| Check | Description | Outcome |
|---|---|---|
| Holdout | Fitted on train; applied on independent test days. | Typical ~45% RMS reduction on test. |
| Forward-only | Train on earlier days; test on later. | No future-data leakage. |
| Multiple years | 2023–2025. | Comparable improvement. |
| Robustness | Alternative splits; withheld baselines. | Not driven by one subset. |
Demonstration: schematic before/after (illustrative, no method).
4. What is not disclosed
- Functional form, parameters, implementation, or reverse-engineering path.
5. Pilot evaluation
Results-only evaluation on your data under agreement. Apply · Pilot overview · TareProgram@Banlys.com