Table 2
Compression results for forward-predicted data.
| Prediction method | MWA (%) | MeerKAT (%) | LOFAR HBA (%) | LOFAR LBA (%) | Average (%) |
|---|---|---|---|---|---|
| No prediction | 72.5 | 19.9 | 19.8 | 48.3 | 40.1 |
| Previous value | 54.3 | 16.8 | 15.3 | 26.6 | 28.3 |
| Linear | 41.8 | 13.9 | 14.0 | 26.5 | 24.1 |
| Quadratic | 38.4 | 13.3 | 14.9 | 30.7 | 24.4 |
| Cubic | 41.0 | 13.8 | 16.5 | 34.6 | 26.5 |
| Average from 2 values | 56.8 | 17.6 | 16.2 | 26.5 | 29.3 |
| Linear from 3 values | 44.0 | 14.7 | 14.6 | 24.9 | 24.6 |
| Quadratic from 4 values | 38.3 | 13.6 | 15.4 | 28.2 | 23.9 |
| Linear in time, quadratic in frequency | 39.9 | 13.6 | 14.1 | 28.0 | 23.9 |
Notes. All values are the resulting fractional size in percentages. Each result uses DEFLATE level 9. The MeerKAT and LOFAR HBA values are averaged over all directions. The LOFAR LBA values are the average over the full resolution, time and frequency averaged, and BDA results. The best compression value for each dataset is printed in bold.
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