Sensitivity Analysis of Multi-Temporal Sentinel-1 SAR Parameters to Crop Height and Canopy Coverage
| Autor: | Aliihsan Sekertekin, Fusun Balik Sanli, Rouhollah Nasirzadehdizaji, Ziyadin Cakir, Mustafa Ustuner, Saygin Abdikan |
|---|---|
| Přispěvatelé: | Çukurova Üniversitesi, Zonguldak Bülent Ecevit Üniversitesi |
| Rok vydání: | 2019 |
| Předmět: |
Canopy
Synthetic aperture radar 010504 meteorology & atmospheric sciences Correlation coefficient 0211 other engineering and technologies Soil science 02 engineering and technology PolSAR Sentinel-1 dual polarimetric SAR scattering coefficient agricultural monitoring crop variables 01 natural sciences lcsh:Technology Correlation Crop lcsh:Chemistry Scattering coefficient General Materials Science Agricultural monitoring Sensitivity (control systems) Instrumentation lcsh:QH301-705.5 021101 geological & geomatics engineering 0105 earth and related environmental sciences Crop variables Fluid Flow and Transfer Processes Physics lcsh:T Process Chemistry and Technology fungi General Engineering food and beverages Sunflower lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Stage (hydrology) lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 9, Iss 4, p 655 (2019) Applied Sciences Volume 9 Issue 4 |
| DOI: | 10.5281/zenodo.2566487 |
| Popis: | The Polarimetric Synthetic Aperture Radar technique has provided various opportunities and challenges in agricultural activities mainly on crop management. The aim of this study is to investigate the sensitivity of 10 parameters derived from multi-temporal Sentinel-1 Synthetic Aperture Radar (SAR) data, to crop height and canopy coverage (CC) of maize, sunflower, and wheat. The correlation coefficient values indicate a high correlation for maize during the early growing stage. The coefficient determinations (R2) of 0.82 and 0.81 indicate that there is a strong relationship between the maize height and SAR parameters including VV + VH and VV, respectively. The maize CC is well correlated with VV parameter (R2 = 0.73), but it is observed that at the later growing stage the correlation became weaker. This means that the sensitivity decreases with increasing vegetation cover growth. Compared to maize, the sensitivity of SAR parameters to wheat variables is often good at the early stage. However, the highest correlation with wheat height represented by Alpha (&alpha ) decomposition parameter (R2 = 0.67). The sunflower height has an insignificant correlation with the majority of SAR parameters and only VH polarization shows low sensitivity (R2 = 0.31). The sunflower CC shows relatively higher correlation with VV polarization (R2 = 0.46) at the early stage while no considerable correlation is observed at the later stage. It is found that Sentinel-1 has a high potential for estimation of crop height and CC of the maize as a broad-leaf crop. The same is not true for sunflower as another broad-leaf crop. |
| Databáze: | OpenAIRE |
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