Abstract

Information about oil palm phenology is required for oil palm plantation management, but using spaceborne polarimetric radar imagery remains challenging. However, spaceborne polarimetric radar on X-, C-, and L-band is promising on structure vegetation and cloud area. This study investigates the scattering model of oil palm phenology based on spaceborne X-, C-, and L-band polarimetric Synthetic Aperture Radar (SAR) imaging. The X-, C-, and L-band polarimetric SAR are derived from spaceborne of TerraSAR-X, Sentinel-1A, and ALOS PALSAR 2. Study area is located in oil palm plantations, Asahan District, North Sumatra, Indonesia. The methodology includes data collection, preprocessing, radiometric calibration, speckle filtering, terrain correction, extraction of scattering value, and development of scattering model of oil palm phenology. The results showed different scattering characteristics for the X-, C-, and L-band polarimetric SAR of oil palm for age and found the potential of the scattering model for oil palm phenology based on the X-band on HH polarization that showed a nonlinear model with R 2 = 0.65 . The C-band on VH and VV polarization showed a nonlinear model with R 2 = 0.56 and R 2 = 0.89 . The L-band on HV and HH polarization showed a logarithmic model with R 2 = 0.50 and R 2 = 0.51 . In this case, the most potential of the scattering model of oil palm phenology based on R 2 is using C-band on VV polarization. However, the scattering model based on X-, C-, and L-band is potentially to be used and applied to identify the phenology of oil palm in Indonesia, which is the main parameter in yield estimation. For the future phenology model needs to improve accuracy by integrating multisensors, including different wavelengths on optical and microwave sensors and more in situ data.

Highlights

  • Oil palm (Elaeis guineensis) is a palm tree that is generally planted in Southeast Asia, in Malaysia, Indonesia, and Thailand

  • The scattering model of oil palm phenology was based on X-band with Horizontal to Horizontal (HH) polarization

  • This study investigated the scattering model of oil palm phenology based on X, C, and L-band polarimetric Synthetic Aperture Radar (SAR) imaging in Asahan Regency, North Sumatra, Indonesia

Read more

Summary

Introduction

Oil palm (Elaeis guineensis) is a palm tree that is generally planted in Southeast Asia, in Malaysia, Indonesia, and Thailand. Oil palm can produce cooking oil, mechanical oil, and fuel, widely utilized in daily life and industry [1, 2]. Oil palm obtained from seeds or portions in a hard mesocarp shell produces around 80% saturated fat that can be utilized as a raw material for the production of soap, cleansers, and other substances in the oleochemical industry [3,4,5]. High yields and low production costs from oil palm are the reasons that encourage commercial plantation companies to develop oil palm trees for a considerable scope [7]. Because of expanding worldwide interest for nourishment and fuel, oil palm cultivation has been extended exponentially [8], and nowadays, oil palm is one of the most consumed vegetable oils in the world [9]

Methods
Results
Discussion
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call