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Remote sensing is the technique of acquiring, processing, and interpreting images and multi channels spectral data,
acquired from optical imager sensors mounted on aircraft and satellite platforms recording the interaction between
investigated objects and electromagnetic energy. Remote sensing application in Earth observation begins with the design
and development of equipment for carrying out research of the monitored objects remotely and without disturbing their
integrity. Ground-truth data in Earth observation of the environment and in the remote sensing investigations are very
important. In this work remote sensing images are used for mineral exploration in different applications for mapping
geology and recognizing soils and rocks by their spectral signatures. We are used Landsat, ASTER and Sentinel satellites
images used to interpret both structures, soils and rocks. For data verification hyperspectral systems USB 2000 and
NIRQUEST 512.2 of Ocean Optics Inc. are used in laboratory and field spectrometric measurements. They provide to
define finest spectral characteristics of soil minerals and rocks for their identification. The obtained spectral data are
compared with similar data from different instruments for Earth observation included in the spectral libraries. They
correspond to the shape of the spectral signature in the same spectral range obtained with other spectrometers. These
promising results encourage us to plan the next campaigns for the field spectroscopy measurements in different regions
of Bulgaria.
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