TITLE:
Reflectance Spectra Measurements of Mt. Etna: A Comparison with Multispectral/Hyperspectral Satellite
AUTHORS:
Stefania Amici, Alessandro Piscini, Marco Neri
KEYWORDS:
ASTER, EO1-Hyperion, FieldSpecPro, Etna, Imaging Spectroscopy
JOURNAL NAME:
Advances in Remote Sensing,
Vol.3 No.4,
December
4,
2014
ABSTRACT: We present a collection of
eight reflectance spectra representative of Mt. Etna volcano lava flows. The
reflectance spectra were measured with a FieldSpecPro from 350 nm to 2500 nm
during a fieldwork in June 2007. The reflectance has been compared with
reflectance obtained by multispectral Advanced Space borne Thermal Emission and
Reflection Radiometer (ASTER) and by hyper spectral EO1-Hyperion satellites.
Prior the comparison, reflectance spectra have been convolved with ASTER and
EO1-Hyperion spectral functions. The results show percentage errors in
accordance to those present in literature in the ASTER SWIR range. However,
some differences have been confirmed for the ASTER reflectance product
(ASTER_07) in visible channels. Regarding EO1-Hyperion, a good agreement of
reflectance against field measurement has been found resulting in 5% percentage
maximum error in the VIS and up 30% in SWIR spectral range. The capacity of
reproducing spectral feature by EO1-Hyperion has been checked on bright pixels
(ice-snow) in the acquired image.