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              "label": "Erreur interpolation / r\u00e9\u00e9chantillonnage",
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                  "level": 1.0,
                  "signal": "PCA Q"
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              ],
              "interpretation": "D\u00e9calage syst\u00e9matique entre campagnes, instruments ou r\u00e9f\u00e9rence blanche.",
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                  "level": 1.0,
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              "key": "vera25_like",
              "label": "Signature VERA25-like",
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            {
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                  "level": 1.0,
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              "interpretation": "Modification de l'illumination, collecte, angle ou distance sonde-\u00e9chantillon.",
              "key": "probe_geometry",
              "label": "Diff\u00e9rence de sonde / g\u00e9om\u00e9trie",
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            {
              "evidence": [
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                  "level": 1.0,
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                {
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              "key": "clipping",
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                  "level": 1.0,
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              "interpretation": "Couverture partielle du spot; contribution du fond ou du support.",
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