This report is focused on the utilization of cloud based platform – SENTINEL-HUB©, operated by Sinergise© Slovenia, for processing of a large amount of satellite data from different sensors. The aim is to demonstrate the processing of ESA’s COPERNICUS Sentinel-1 time series SAR, and reference optical Sentinel-2 imagery, in the purpose of SRTI-BAS/ESA’s project - “FoReS”. Also, the report describes the processing of optical VHR satellite imagery from the WorldView and GeoEye missions, via the SENTINEL-HUB platform. The test site is located in mountainous forest in Stara Planina mountain massif. Firstly, an overview of the platform and its activation through dedicated API key was made. The user interface, making cURL requests, and formulating various functions in Javascript are covered. The processing of individual radar images from Sentinel-1 and optical images from Sentinel-2 is demonstrated. Averaging SAR time series were then performed for two summer periods, in the years 2020 and 2021, in the purpose of FoReS – WP4. Two SAR indices were also calculated - dual-pol Radar Vegetation Index (dRVI) and Degree of Polarization (DoP), available at the Sentinel-Hub’s Custom Repository. Also, for the FoReS - WP4 purposes, high-resolution imagery from the MAXAR’s collection of WorldView and GeoEye were provided. Four-band composites, pansharpen image, and the Normalized Vegetation Index (NDVI) were calculated. In conclusion, the author brings the focus on the convenience of working with the cloud based platform SENTINEL-HUB with dedicated APIs, highlighting its advantages in processing a large set of data. Access to the platform, as well as the VHR data, was carried out through a project proposal to the ESA, via Notation of Request (NoR).