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Paddy Rice Monitoring Using TanDEM-X

Rossi, Cristian and Erten, Esra (2015) Paddy Rice Monitoring Using TanDEM-X. IEEE Transactions on Geoscience and Remote Sensing, 53 (2), pp. 900-910. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2014.2330377 ISSN 0196-2892

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Official URL: http://ieeexplore.ieee.org/

Abstract

This paper evaluates the potential of spaceborne bistatic interferometric SAR images for the monitoring of biophysical variables in wetlands, with a special interest on paddy rice. The assessment is made during the rice cultivation period, from transplanting to harvesting time (May to October) for fields around Gala lake (Turkey), one of the largest and most productive paddy rice planting area in the country. Detailed ground truth measurements describing biophysical parameters are collected in a dedicated campaign. A stack of 16 dual-pol TanDEMX images is used for the generation of 32 Digital Elevation Models (DEMs) over the studied area. The quality of the data allows the use of the interferometric phase as a state variable capable to estimate crop heights for almost all the growing stages. The early vegetative rice stage, characterized by flooded fields, cannot be represented by the interferometric phase due to a low Signal-to-Noise-Ratio (SNR) but can be easily detected by amplitude and interferometric coherence thresholding. A study on the impact of the polarization in the signal backscatter is also performed. An analysis of the differences between HH and VV DEMs shows the varying signal penetration for the two polarizations at different growing stages. The validation with reference data demonstrates the capability to establish a direct relationship between interferometric phase and rice growth. The very high coherence of TanDEM-X data yields elevation estimates with root mean square error in a decimetric level, supporting temporal change analysis on a field-by-field basis.

Item URL in elib:https://elib.dlr.de/92564/
Document Type:Article
Title:Paddy Rice Monitoring Using TanDEM-X
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rossi, Cristiancristian.rossi (at) dlr.deUNSPECIFIED
Erten, EsraITUUNSPECIFIED
Date:February 2015
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:53
DOI :10.1109/TGRS.2014.2330377
Page Range:pp. 900-910
Editors:
EditorsEmail
Plaza, Antonio J.aplaza@unex.es
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:TanDEM-X, agriculture, paddy-rice monitoring, synthetic aperture radar interferometry, polarimetry, DEM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Rossi, Cristian
Deposited On:27 Nov 2014 13:27
Last Modified:31 Jul 2019 19:49

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