Ionospheric F-region plasma density topography maps using OI 777.4 nm all-sky images
Bibliographic record
Abstract
Observations of the OI 777.4 nm nightglow emission using an all-sky imaging system and ionospheric sounding using a Canadian Advanced Digital Ionosonde (CADI) have been recently carried out at São José dos Campos (23.21oS, 45.86oW) and Brazópolis (22.53oS, 45.57oW), respectively. The OI 777.4 nm emission comes mainly from the radiative recombination process (O+ + e ! O* + O*) followed by radiative process (O*(5P)!O*(5S) + h ( = 777.4 nm). It is known that to a good approximation the peak electron density is proportional to (J7774)1/2, where J7774is the vertical column emission rate. Using the near simultaneous optical imaging and ionospheric sounding observations on four selected geomagnetically quiet nights without any presence of large-scale plasma depletions, we have obtained the linear correlation coefficient () between the F-region peak electron density and OI 777.4 nm emission intensity. Using and OI 777.4 nm emission images, topography maps of F-region plasma density have been obtained for several nights, both with and without plasma bubbles. The topography maps are then used to study the dynamics of the equatorial ionospheric anomaly as well as plasma depleted regions. Some of the topographic maps show the equatorial ionospheric anomaly region having high foF2 values of the order of 15-17 MHz with the surrounding areas having much lower foF2 values in the range of 8-12 MHz. Also, the presence of plasma bubbles in the topographic maps on some nights show that the foF2 values in plasma depleted regions are about 50% lower than the surrounding regions.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.005 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".