Monitoring of Spectral Signatures of Maize Crop using Temporal SAR and Optical Remote Sensing data

Authors

  • D. Anil Kumar Water Technology Centre, Rajendranagar, Hyderabad, Telengana (500 030), India
  • P. Srikanth Agricultural Sciences and Applications Group, Remote Sensing-Applications Area, National Remote Sensing Centre, Indian Space Research Organization, Hyderabad, Telengana (500 037), India
  • T. L. Neelima Water Technology Centre, Rajendranagar, Hyderabad, Telengana (500 030), India
  • M. Uma Devi Water Technology Centre, Rajendranagar, Hyderabad, Telengana (500 030), India
  • K. Suresh Examination centre, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telengana (500 030), India
  • C. S. Murthy Water Technology Centre, Rajendranagar, Hyderabad, Telengana (500 030), India

Keywords:

Maize, remote sensing, sentinel, spectral signature, VH backscatter

Abstract

A study was carried out using the temporal Sentinel-1B microwave data (June to November at 12 days interval) and Sentinel-2A/2B optical data (June to November) to discriminate the maize crop from other competing crops rice and cotton in Siddipet district, Telangana state, India during kharif, 2019 (June to November). The study utilized the data from multiple sources such as Multi-temporal VH backscatter intensity from Sentinel-1B SAR and NDVI values from Sentinel-2A/2B in combination with field data to discriminate the maize crop. Synchronous to satellite pass, ground truth data on crop parameters viz., crop stage, crop vigour, biomass, plant height, plant density, soil moisture, LAI and chlorophyll content were collected. Multi-temporal VH backscatter intensity and Normalized Difference Vegetation Index (NDVI) data were used to characterize backscatter and greenness behaviour of the maize crop. The backscatter intensity (dB) for maize crop ranged from -21.83 (the lowest backscatter values) at planting to -12.52 (the highest backscatter values) at peak growth stage. The NDVI values during vegetative and reproductive stages (August and September) were >0.6 and during senescence to harvesting the values were less than or equal to 0.52. The increase in backscatter intensity values from initial vegetative stage to peak stage was due to increased volume scattering of the maize crop canopy and a continuous decline in backscatter intensity values of VH band at maturity stage, was due to decrease in greenness and moisture content in leaves of the maize crop helped in maize crop discrimination from other dominant kharif crops in the study area.

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Published

2021-12-31

How to Cite

1.
Kumar DA, Srikanth P, Neelima TL, Devi MU, Suresh K, Murthy CS. Monitoring of Spectral Signatures of Maize Crop using Temporal SAR and Optical Remote Sensing data. IJBSM [Internet]. 2021 Dec. 31 [cited 2024 May 25];12(Dec, 6):745-50. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/4168

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