2. Remote sensing data sources
For renewal as well as monitoring of SOC crossways VNIR-SWIR spectral span, remote sensing (RS) via various sources gave statistics streams. Various kinds of sensors (in case of imaging spectroscopy) are set up on airborne (Castaldi, Chabrillat et al. 2018) or else spaceborne platforms. As a result, Unmanned Aerial Systems (UASs) are widely used to perform succeeding generation of hand-sized hyperspectral imagers (Aldana-Jague, Heckrath et al. 2016). Brief explanation of remote sensors requirements for SOC estimations are given below: