Temperature Dynamics Assessment of Agricultural Objects Based on Unmanned Aircraft Data

Abstract

During the study, the spatial and temporal distribution of radiant temperature of agricultural fields has been made. The object of the study is agricultural fields (barley, oats, fallow field, perennial grasses (Onobrychis)), located on the territory of the Krasnoyarsk Research Institute of Agriculture of the FRC KSC SB RAS near the village of Minino (Central Siberia, Krasnoyarsk region). The radiant temperature measurement of objects surface was taken by the ZENMUSE XT2 camera installed on the unmanned aircraft DJI Matrice 210 RTK V2. The spatial resolution of the obtained thermal maps is 12 – 14 cm. The state of the objects (the presence of vegetation cover) was assessed using the NDVI values obtained from the PlanetScope satellite data with a spatial resolution of 3 meters. It was established that the presence of plants and the size of their projective cover are decisive in the formation of soil cover temperature conditions. The growth and development of the vegetation cover, its height and closeness, change the temperature regime conditions. Instead of a soil, vegetation cover becomes an active surface. The thermal maps (spatial distribution of radiant temperature) of the agricultural land surface has been carried out, which makes it possible to assess the in-field temperature heterogeneity of the objects