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Table 1
Summary of the preprocessing procedure.
| Definition | Number of spectra | Percentage of | |
| remaining spectra (%) | |||
|
|
|||
| Original dataset | Martian year: 24 | 977 561 | 100 |
| solar longitude: 180° ± 5° | |||
| latitude range: ±60° | |||
| local time: 11–15 | |||
| emission angle: 0−5 | |||
|
|
|||
| Upper and | emissivity range: 0.05–1.10 | 843 625 | 86 |
| lower limit | |||
|
|
|||
| Ripple removing | ripple parameter range: | 782 478 | 80 |
| 0.992–1.012 | |||
|
|
|||
| Noise and | emissivity noise: ≤0.017 | 710 874 | 73 |
| temperature cutoff | temperature: ≥250 K | ||
Notes. For each step we indicate the number of spectra in the dataset and their percentage of the original dataset. The criteria adopted at each step are synthetically described in the second column.
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