Table 1.
Huffman compression performance for each Planck LFI data object and frequency channel.
| 30 GHz |
44 GHz |
70 GHz |
|||||
|---|---|---|---|---|---|---|---|
| Item | Raw | Huffman | Raw | Huffman | Raw | Huffman | Raw/Huffman |
| TOD | 361 | 52 | 776 | 95 | 2625 | 340 | 6 |
Pointing ( ) |
181 | 10 | 388 | 18 | 1312 | 69 | 20 |
| Pointing (ψ) | 90 | 5 | 194 | 10 | 656 | 24 | 25 |
| Quality flag | 45 | 3 | 97 | 6 | 328 | 10 | 33 |
| Total | 730 | 70 | 1230 | 130 | 4530 | 450 | 10 |
Notes. Columns 2–6 are all given in units of gigabytes. The last column shows the average ratio between the raw and compressed data volumes.
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