Time-Delay Integration Ccd Readout Technique: Image Deformation
Bibliographic record
Abstract
this report is not exhaustive, but is meant only to draw attention to several drawbacks to direct imaging with a CCD in the TDI mode. A complete systematic overview of the problem hinges upon access to TDI data. Such a programme is underway (Hickson, Gibson & Hogg 1992, in preparation) and will be presented in these -- 6 -- pages once imaging data from the UBC/Laval 2.7m LMT galaxy survey (Gibson & Hickson 1991) is available. -- 7 -- 2 ANALYSIS 2.1 Image Deformation Along a CCD Column: East-West Determining the full TDI response function for a CCD in the east-west (EW) direction h(`) is a two-step procedure. First, the response (`) due solely to the discrete shifting of the pixels to match the sidereal rate is generated by passing a delta-function ffi(`) along a single column of the detector. For a particular pixel n and offset ! from ffi(`) to the centre of some reference pixel (e.g. for pixel n = 0, ! could range from-1/2 to +1/2 pixel) when the CCD clocking occurs, this "discrete shifting" contributor to the total EW response can be uniquely determined by simply sliding the triangle function (`) (Bracewell 1978) appropriately and sampling the function at the centres of the pixels beneath (`). Second, there is the well-known further broadening (e.g. Dick, Jenkins & Ziabicki 1989) due to the inherent width of the pixel \\Pi(`) (i.e., the box function -- Bracewell 1978). This "pixel width" broadening is an affliction relevant not only to TDI data, but also to CCD data read out using the conventional standard techniques mentioned in x1, and more extensively in the Dick et al. paper. Assuming that the pixels have uniform sensitivity throughout their area, the EW response of the n
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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 | 0.000 | 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) | 0.000 | 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".