Radar Remote Sensing of Agricultural Canopies: A Review

Susan C. Steele-Dunne, Heather McNairn, Alejandro Monsivais-Huertero, Jasmeet Judge, Pang Wei Liu, Kostas Papathanassiou

Research output: Contribution to journalReview articlepeer-review

125 Citations (Scopus)
352 Downloads (Pure)

Abstract

Observations from spaceborne radar contain considerable information about vegetation dynamics.The ability to extract this information could lead to improved soil moisture retrievals and the increased capacity to monitor vegetation phenology and water stress using radar data.The purpose of this review paper is to provide an overview of the current state of knowledge with respect to backscatter from vegetated (agricultural) landscapes and to identify opportunities and challenges in this domain.Much of our understanding of vegetation backscatter from agricultural canopies stems from SAR studies to perform field-scale classification and monitoring.Hence, SAR applications, theory, and applications are considered here too.An overview will be provided of the knowledge generated from ground-based and airborne experimental campaigns that contributed to the development of crop classification, crop monitoring, and soil moisture monitoring applications.A description of the current vegetation modeling approaches will be given.A review of current applications of spaceborne radar will be used to illustrate the current state of the art in terms of data utilization.Finally, emerging applications, opportunities and challenges will be identified and discussed.Improved representation of vegetation phenology and water dynamics will be identified as essential to improve soil moisture retrievals, crop monitoring, and for the development of emerging drought/water stress applications.

Original languageEnglish
Article number7812707
Pages (from-to)2249-2273
Number of pages25
JournalIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Volume10
Issue number5
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • Agriculture
  • airborne radar
  • scattering
  • spaceborne radar
  • synthetic aperture radar
  • vegetation

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