Simulation of the Effect of Convecting Patches of Enhanced Electron Density on HF Over-the-Horizon Radars (OTHRs) in the Polar Regions
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Bibliographic record
Abstract
High-frequency over-the-horizon radars (OTHR) provide an economical means to detect and track noncooperative air targets over large expanses of land and sea. Due to the dynamic nature of the ionosphere, an OTHR requires a frequency management system where the operating frequencies and launch angles (azimuth and elevation) change periodically to maintain constant target detection. Accurate electron density models are required for the purpose of improving OTHR performance and for system planning and design. This is particularly true in the polar regions where large-scale electron density structures taking the form of patches and arcs of enhanced electron density are the common features of the F-region ionosphere. These structures form tilted reflection surfaces for HF radiowaves and result in propagation well displaced from the great circle direction. The effects of patches on the ray paths have been simulated, and their impact on OTHR frequency management is illustrated.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it