An efficient algorithm for fully capturing a ground moving target's energy for spaceborne SAR-GMTI
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Bibliographic record
Abstract
A highly efficient algorithm is proposed to collect all the energy of a moving target, irrespective of its speed and direction, and has been applied to real RADARSAT-2 MODEX (Moving Object Detection EXperiment) data. Results show that the algorithm maximizes the SCNR (signal-to-clutter-plus-noise ratio) in existing spaceborne SAR-GMTI (Synthetic Aperture Radar Ground Moving Target Indication) systems with a minimal increase in the processing load. Instead of attempting to match to all possible radial speeds of unknown movers in order to adequately apply SAR focusing, the algorithm requires only two full iterations of SAR processing per channel. The first iteration is a static world, full PRF (pulse repetition frequency) bandwidth SAR processing step. The second iteration is two DC (Doppler centroid) offset, half PRF bandwidth SAR processing iterations. By coherently combining the SAR-DPCA (displaced phase center antenna) images, the energy of movers can be completely recovered.
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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) | 0.000 | 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 it