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codeListValue="dataset">dataset</gmd:MD_ScopeCode>            </gmd:level>          </gmd:DQ_Scope>        </gmd:scope>        <gmd:report>          <gmd:DQ_AbsoluteExternalPositionalAccuracy>            <gmd:result>              <gmd:DQ_QuantitativeResult>                <gmd:valueUnit>                  <gml:BaseUnit gml:id="m">                    <gml:identifier codeSpace="http://www.bipm.org/en/si/base_units">m</gml:identifier>                    <gml:unitsSystem xlink:href="http://www.bipm.org/en/si"/>                  </gml:BaseUnit>                </gmd:valueUnit>                <gmd:value>                  <gco:Record>                    <gco:Real>0.5</gco:Real>                  </gco:Record>                </gmd:value>              </gmd:DQ_QuantitativeResult>            </gmd:result>          </gmd:DQ_AbsoluteExternalPositionalAccuracy>        </gmd:report>        <gmd:report>          <gmd:DQ_DomainConsistency>            <gmd:result>              <gmd:DQ_ConformanceResult>                <gmd:specification>                  <gmd:CI_Citation>                    <gmd:title>                      <gmx:Anchor xlink:href="http://data.europa.eu/eli/reg/2010/1089">REGOLAMENTO (UE) N. 1089/2010 DELLA COMMISSIONE del 23 novembre 2010 recante attuazione della direttiva 2007/2/CE del Parlamento europeo e del Consiglio per quanto riguarda l'interoperabilità dei set di dati territoriali e dei servizi di dati territoriali</gmx:Anchor>                    </gmd:title>                    <gmd:date>                      <gmd:CI_Date>                        <gmd:date>                          <gco:Date>2010-12-08</gco:Date>                        </gmd:date>                        <gmd:dateType>                          <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>                        </gmd:dateType>                      </gmd:CI_Date>                    </gmd:date>                  </gmd:CI_Citation>                </gmd:specification>                <gmd:explanation>                  <gco:CharacterString>Fare riferimento alle specifiche indicate</gco:CharacterString>                </gmd:explanation>                <gmd:pass gco:nilReason="unknown"/>              </gmd:DQ_ConformanceResult>            </gmd:result>          </gmd:DQ_DomainConsistency>        </gmd:report>        <gmd:lineage>          <gmd:LI_Lineage>            <gmd:statement>              <gco:CharacterString>Firme acquisite in giornate con condizioni metereologiche stabili (soleggiato, variabile o nuvoloso), conseguenti a giornate prive di precipitazioni, onde evitare che il materiale campionato risentisse della presenza di acqua o umidità.Spettri acquisiti relativi alla luce visibile (V), all’infrarosso vicino (NIR) e all’infrarosso a onde medie (SWIR), intervallo spettrale 350-2500 nm.Risoluzione spettrale: 3nm (Full-Width-Half-Maximum) a 700 nm; 10 nm (Full-Width-Half-Maximum) a 1400 nm; 10 nm ( Full-Width-Half-Maximum) a 2100 nm.Intervallo di campionamento: 1.4 nm per la regione spettrale 350-1000 nm; 2 nm per la regione spettrale 1000-2500 nm. Valori delle firme spettrali in riflettanza, calcolata utilizzando a riferimento un pannello bianco Spectralon (White Reference), costituito da materiale con riflettanza del 95-99% sull’intero spettro, campionato in sito prima di ogni misurazione.Procedimento acquisizione ed elaborazione dato: 1- Misura della Dark Current (DC); misura della quantità di corrente elettrica inerente ai componenti dello spettroradiometro.2- Misura del White Reference (WR); 10 misurazioni in un intervallo di acquisizione di 10 secondi.3- Ottimizzazione (Opt – Optimize) 4- Acquisizione dati spettrometrici sui materiali cercando di mantenere la pistola con la stessa inclinazione della precedente acquisizione del WR; 10 misurazioni in un intervallo di acquisizione di 10 secondi.5- Post-elaborazione del dato acquisito; i dati acquisiti in ogni misura vengono mediati per ottenere un unico dato risultante che viene successivamente diviso per il dato mediato del WR in modo da ottenere la riflettanza spettrale del materiale campionato nell’intero intervallo VNIR-SWIR. In corrispondenza dei valori di lunghezza d’onda 1440 nm e 1800 nm appaiono due finestre di disturbo causate dalla presenze di particelle d’acqua nell’atmosfera che vengono sempre eliminate.Le firme spettrali sono fornite sotto forma di file .txt riportante prima una serie di attributi (Name, Owner, Wavelength Range, eccetera) e successivamente due colonne relative ai dati dell’asse x (lunghezza d’onda) e i dati dell’asse y (riflettanza da 0 a 100).</gco:CharacterString>            </gmd:statement>          </gmd:LI_Lineage>        </gmd:lineage>      </gmd:DQ_DataQuality>    </gmd:dataQualityInfo>  </gmd:MD_Metadata>