Effects of the 2024 total solar eclipse upon reception of trans-Atlantic signals in the medium-wave broadcast band, using software defined radio files recorded in Welwyn, UK.
Bibliographic record
Abstract
Recorded by: Jack Weber, M0GKC. Grid square of location recorded: IO91vu Maximum obscuration of the sun was 0%, as the eclipse ended in the North Atlantic Ocean, west of the recording site. However, unusual signals were noted from North America during the eclipse period. These data files are recordings of the entire medium wave broadcast band (535-1705kHz) made during the total solar eclipse of 8 April 2024 from 1930 to 2100UT from Welwyn, UK. They are part of a set of such recordings made from 1800UT to 2100UT on 7 April, 2024 and 1800UT to 2100UT on 8 April, 2024. Data Quality: Only limitation was some local electrical noise heard above 1500kHz, otherwise, good. Data files are .wav format, but the archived files are .zip, with about five .wav files packaged together in each .zip file, using the prefix “M0GKC-wideband_332_1868kHz_ “. The recordings not included here are available by contacting HamSCI at am-eclipse@hamsci.org if you require this data. Antenna: Terminated delta loop (KAZ antenna) 13m long 5m tall, beaming 280 degrees, pointing roughly to Newfoundland, Miami and Guatemala. Adjustable Vactrol termination was used, but not varied during the recordings. (Although the Vactrol is temperature sensitive, just a 2 C drop occurred over the three-hour record period. The Vactrol was inside a sealed plastic enclosure in a shady area and was never hit by direct sunlight so should only have been affected by the ambient temperature) Receiver: Elad FDM-S3; front-end attenuation of 6dB, with center frequency 1110kHz, recording a 1536kHz wide passband, using SDR-Console v3.3, delivering wav RF64 files. Hardware was locked to a Leo Bodnar GPS (10MHz). Recording computer time was time locked to Leo Bodnar NTP server.
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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 | 0.001 |
| 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 | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.012 | 0.003 |
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".