A preliminary approach on the use of satellite hyperspectral data for geological mapping


Δημοσιευμένα: Jan 1, 2007
Λέξεις-κλειδιά:
Hyperion Μήλος Ατμοσφαιρική Διόρθωση Φασματικές Βιβλιοθήκες
G. K. Nikolakopoulos
D. A. Vaiopoulos
G. A. Skianis
Περίληψη

Στην εργασία αυτή εξετάζονται οι δυνατότητες των σύγχρονων δορυφορικών υπερφασματικών δεκτών στην αναγνώριση και χαρτογράφηση ορυκτών. Η νήσος Μήλος επιλέχθηκε ως περιοχή μελέτης και χρησιμοποιήθηκε μία εικόνα Hyperion με 242 φασματικές ζώνες. Έγινε μείωση των φασματικών ζωνών μέσω δύο διαφορετικών διαδικασιών: Αρχικά εξετάστηκαν τα στατιστικά όλων των ζωνών και απομονώθηκαν οι μη βαθμονομημένες ζώνες. Στη συνέχεια η τεχνική Minimum Noise Fraction χρησιμοποιήθηκε για την ταξινόμηση των ζωνών με βάση το λόγο σήματος προς θόρυβο. Οι ζώνες με τον περισσότερο θόρυβο απομακρύνθηκαν και τελικώς εξήντα ζώνες επελέγησαν για περαιτέρω επεξεργασία. Έγινε ατμοσφαιρική διόρθωση των επ^γμένων υπερφασματικών ζωνών ώστε να καταστεί δυνατή η σύγκριση τους με επιλεγμένες φασματικές βιβλιοθήκες. Η σύγκριση των ζωνών του Hyperion με τη φασματική βιβλιοθήκη του JPL έδωσε ενθαρρυντικά αποτελέσματα. Περαιτέρω επεξεργασία με χρήση ειδικών αλγορίθμων για τα υπερφασματικά δεδομένα πρόκειται να γίνει στο άμεσο μέλλον

Λεπτομέρειες άρθρου
  • Ενότητα
  • New Technologies in Geophysical and Geological Research
Λήψεις
Τα δεδομένα λήψης δεν είναι ακόμη διαθέσιμα.
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