Seasonal Variation of the Radiant Distribution of Sporadic Meteoroids
Bibliographic record
Abstract
Introduction: Meteoroids in the millimeter size range represent the highest rate of mass flux onto the Earth. The radiant distribution and orbital characteristics of sporadic meteoroids in this size range have been studied [1] and the classes of bodies which produce sporadic meteors are under investigation (Wiegert et al., abstract in this volume). We want to understand not only which bodies in the solar system contribute to the sporadic meteoroid complex, but also how old the complex is and whether its current form is due simply to the gradual erosion of the parent bodies or whether certain components represent the remnants of a cataclysmic event in the past [2],[3], such as the disruption of a large comet. The Sporadic Complex: Sporadic meteoroids tend to strike the Earth from certain directions, or apparent sources, which remain fixed with respect to the sun as the Earth moves through its orbit. The six main directional enhancements are in the helion direction (to the left in Fig. 1), the antihelion source (symmetrical to the helion source, on the other side of the apex), the north and south apex sources and the toroidal sources, of which only the north toroidal is visible in the figure due to the latitude at which the observations were made. In addition, there is a ring structure involving a sudden transition from a region of enhanced radiant density, just outside of 55 degrees from the apex, to a region of low radiant density just inside this line.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.002 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".