Vol. 11, Issue 12 (2022)

Author(s):
Sonam and Ajeet Singh Nain

Abstract:
In this study, Sentinel-1 SAR backscatter data were analyzed at different phenological stages throughout the growth period of rice during kharif 2021. Ground based observations of fresh biomass of rice crop was recorded at the corresponding phenological stages. The time series analysis of SAR backscatter and fresh biomass was performed. Both VV & VH polarized SAR backscatter were also correlated with fresh biomass at 90 DAT. The results indicated that SAR backscatter has smaller values in the beginning which increases rapidly during vegetative stages, attains a peak near reproductive stage and then decreases. Similar trend was observed for fresh biomass. Also, both VV and VH backscatter exhibited strong positive correlation with SAR backscatter with R² of 0.75 and 0.80, respectively. Hence, research for assessing the potential of SAR backscatter for obtaining rice biomass estimates should be performed by researchers.