Removing Clock-Drift and Ionospheric Errors from the CHIME-KKO VLBI Delays
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst project (CHIME/FRB) and its three outrigger telescopes will form a Very Long Baseline Interferometry (VLBI) network, with the goal of localising many hundreds of one-off and repeating FRBs to sub-arcsecond precision. Phase calibration is essential for successful VLBI, and requires removing errors due to ionosphere, clock, and instrumental delays. For calibrating the VLBI network, we plan to employ pulsars and traditional steady radio sources spread over the entire sky as calibrators. The first CHIME/FRB Outrigger, k'niʔatn k'l‿stk'masqt (KKO), came online in June 2022 and has been in commissioning ever since. It has a 66-km line of sight distance to CHIME and can provide a localisation accuracy of 1 arcsecond along the direction of the baseline. As the pathfinder for the outriggers, KKO has enabled the development and testing of our VLBI calibration techniques.
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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) | 0.003 | 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