Author(s): S. K. TIWARI, M.L. PRASAD RAO AND G. P. RAO

Abstract: In monsoon season, identification and mapping of paddy rice under cloud cover using microwave remote sensing is vital for precise paddy crop acreage estimation. During the cloud cover, the assessment of paddy rice acreage through optical sensor data is impractical. Synthetic Aperture Radar (SAR) signal has the capability to infiltrate the clouds and receive the signal generated from the objects. Sentinel-1, C-band SAR data with VV (vertical transmit & vertical receive) polarization with Interferometric Wide (IW) swath mode was used to estimate the paddy crop area in Andhra Pradesh, India. In Andhra Pradesh, Srikakulam, Vizianagaram, Visakhapatnam, West Godavari, East Godavari, Krishna, and Guntur are the predominant paddy crop growing districts which contribute around 86% of the paddy area of Andhra Pradesh as per the paddy crop sown area in Kharif season 2018. The 88% accuracy was achieved for the paddy crop acreage map generated from Sentinel-1 SAR data. The Relative deviation (RD) was assessed by using estimated paddy crop area from Sentinel-1 SAR data with statistics from the Agriculture Department of Andhra Pradesh. Srikakulam, Vizianagaram, Visakhapatnam, West Godavari, East Godavari, Krishna, and Guntur districts showed the significant RD -7.1%, -5.3%, 10.9%, 0.37%, 3.6%, -7.9%, and 6.7%, respectively. The overall RD was -0.2%. of seven major paddy rice-growing districts of Andhra Pradesh.

DOI: 10.22271/09746315.2021.v17.i2.1445

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