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Comparative Analysis of Spectral Characteristics of EO-1 ALI and Landsat 8 OLI Imagery


Affiliations
1 School of Geography and Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China
2 Hebei Provincial Key Lab for Meteorology and Eco-Environment, Meteorological Institute of Hebei Province, Shijiazhuang 050021, China
 

Landsat 8 (L8) is the only normally operating Landsat satellite at present, and the Earth Observing One (EO-1) Advanced Land Imager (ALI) was the prototype for operational land imager (OLI) on-board the L8 satellite. To comprehend well the differences in spectral characteristics between the two sensors, six nearly simultaneous image pairs were selected, which included five land-cover categories: water, bare soil, vegetation, manmade and rock. Moreover, comparisons of spectral characteristics were made through orbital parameters, imaging parameters, spectral response characteristics and spectral characteristics. Finally, the mutual quantitative relations were built up among these image pairs. The results demonstrate that Landsat 8 OLI and EO-1 ALI have similar orbital parameters. With regard to the imaging and spectral response characteristics, the top-of-atmosphere (TOA) reflectance and normalized difference vegetation index (NDVI) of EO-1 ALI are slightly different from those of L8 OLI, but there is a high correlation between EO-1 ALI and L8 OLI of TOA reflectance and NDVI, with the coefficients of determination ranging from 0.962 to 0.994. Therefore, the TOA reflectance and NDVI images from the two sensors are complementary.

Keywords

Top-Of-Atmosphere Reflectance, Spectral Characteristics, Image Pairs, Vegetation Index.
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  • Comparative Analysis of Spectral Characteristics of EO-1 ALI and Landsat 8 OLI Imagery

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Authors

Xuehong Zhang
School of Geography and Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China
Lixin Shi
Hebei Provincial Key Lab for Meteorology and Eco-Environment, Meteorological Institute of Hebei Province, Shijiazhuang 050021, China

Abstract


Landsat 8 (L8) is the only normally operating Landsat satellite at present, and the Earth Observing One (EO-1) Advanced Land Imager (ALI) was the prototype for operational land imager (OLI) on-board the L8 satellite. To comprehend well the differences in spectral characteristics between the two sensors, six nearly simultaneous image pairs were selected, which included five land-cover categories: water, bare soil, vegetation, manmade and rock. Moreover, comparisons of spectral characteristics were made through orbital parameters, imaging parameters, spectral response characteristics and spectral characteristics. Finally, the mutual quantitative relations were built up among these image pairs. The results demonstrate that Landsat 8 OLI and EO-1 ALI have similar orbital parameters. With regard to the imaging and spectral response characteristics, the top-of-atmosphere (TOA) reflectance and normalized difference vegetation index (NDVI) of EO-1 ALI are slightly different from those of L8 OLI, but there is a high correlation between EO-1 ALI and L8 OLI of TOA reflectance and NDVI, with the coefficients of determination ranging from 0.962 to 0.994. Therefore, the TOA reflectance and NDVI images from the two sensors are complementary.

Keywords


Top-Of-Atmosphere Reflectance, Spectral Characteristics, Image Pairs, Vegetation Index.

References





DOI: https://doi.org/10.18520/cs%2Fv112%2Fi11%2F2288-2295