Reflectance Spectra Measurements of Mt. Etna: A Comparison with Multispectral/Hyperspectral Satellite

• 作者: Alessandro Piscini Marco Neri Stefania Amici
• 来源期刊: 遥感技术进展(英文)
• 学科: 医学
• 关键词: ASTER EO1-Hyperion FieldSpecPro ETNA Imaging SPECTROSCOPY
• 年，卷（期）: 2014,（4）
• 页码范围: 235-245
• 页数: 11页
• 分类号: R73

摘要

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.