Geomagnetic Diurnal Transitions of Positron and Electron Flux at 20 - 300MeV as Observed by the AESOP-Lite Balloon Payload
Bibliographic record
Abstract
There are two dominant sources of low-energy electrons and positrons (20MeV - 1GeV) observed at the top of the atmosphere: cosmic rays, and atmospheric secondaries. The latter are produced by the interaction of Cosmic Ray nuclei in the atmosphere either directly above the detector or near the magnetic conjugate point. Upwards-moving secondaries at the conjugate point that have a rigidity lower than the local geomagnetic cutoff can become trapped along the geomagnetic field lines and re-enter the atmosphere by the detector. These are referred to as re-entrant splash albedo. These particles escape the geomagnetic field if their rigidity exceeds the local geomagnetic cutoff. At high latitude, the geomagnetic cutoff depends on location and time. The cutoff is effectively zero during nighttime when the albedo particles of any rigidity can escape via the magnetotail. Thus, the re- entrant albedo enhances the observed flux only during the daytime when the geomagnetic cutoff is non-zero. The balloon-borne spectrometer AESOP-Lite (Anti-Electron Sub-Orbital Payload Low Energy) observed these diurnal transitions at energies between 20MeV and 300MeV during its May 2018 flight from Kiruna, Sweden to Ellesmere Island, Canada. These observations show a time difference in the diurnal geomagnetic cutoff transitions between electrons and positrons. We simulate the trajectory of these particles observed during the 2018 flight to investigate the charge-sign and rigidity dependence of the particle’s path through the magnetosphere during the day-night transitions.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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) | 0.001 | 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 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".