Analysis of the polarimetric response of vineyards at C-band

作者：David Ballester Berman J; Garmendia Lopez Idoia; Lopez Sanchez Juan M; Mangas Martin Victor J

来源：Canadian Journal of Remote Sensing, 2012, 38(3): 223-239.

This paper aims to examine the sensitivity of C-band RADARSAT-2 polarimetric data to the phenology of vineyards and the potential of this technology to monitor variation in grapevine biomass. The analysis conducted indicates that the cross-polar channel exhibits a signature as a function of phenology and particularly from the phenological stage where grape bunches start to develop, also displaying a clear correlation with leaf area index (LAI) changes. This interpretation is supported by the H/alpha/A parameters, which indicate that during the first few weeks the response is dominated by a strong polarized return from a Bragg surface; however, from the grape development onwards, vines can be modeled as a two-component scenario comprising a strong return from soil and a weak depolarized return due to the bunches of grapes and leaves. These observations were used to propose a parameterization of the cross-polar intensity, based on the Water Cloud Model, as a function of the development of grapes and LAI changes over time.

• 出版日期2012-6