Paper Info
Title
Temporal Polarimetric Behavior of Oilseed Rape (Brassica napus L.) at C-Band for Early Season Sowing Date Monitoring
Abstract
Spatial monitoring of the sowing date plays an important role in crop yield estimation at the regional scale. The feasibility of using polarimetric synthetic aperture radar (SAR) data for early season monitoring of the sowing dates of oilseed rape (Brassica napus L.) fields is explored in this paper. Polarimetric SAR responses of six parameters, relying on polarization decomposition methods, were investigated as a function of days after sowing (DAS) during the entire growing season, by means of five consecutive Radarsat-2 images. A near-continuous temporal evolution of these parameters was observed, based on 88 oilseed rape fields. It provided a solid basis for determining the suitable temporal window and the best polarimetric parameters for sowing date monitoring. A high sensitivity of all polarimetric parameters to the DAS at different growing stages was shown. Simple linear models could be calibrated to estimate sowing dates at early growth stages and were validated on an independent data set. Although Volume and Span parameters provided the highest sowing date estimation accuracy at the earlier growth stages, the other four parameters (Volume/Total, Odd/Total, Entropy and Alpha) were more accurate for a wider temporal window. These results demonstrate the capability and high potential of polarimetric SAR data for monitoring the sowing date of crops in the early season.
Year
DOI
Venue
2014
10.3390/rs61110375
REMOTE SENSING
Keywords
Field
DocType
RADARSAT-2,SAR,sowing dates,polarimetric features,polarimetric decomposition,rapeseed
Rapeseed,C band,Growing season,Crop yield,Polarimetry,Remote sensing,Brassica,Sowing,Polarimetric sar,Geology
Journal
Volume
Issue
Citations 
6
11
6
PageRank 
References 
Authors
0.60
23
8
Name
Order
Citations
PageRank
Hao Yang1287.63
Zengyuan Li25825.14
Erxue Chen33617.10
J.-C. Zhao413552.42
Gui-Jun Yang514833.61
Raffaele Casa66511.75
Stefano Pignatti78016.28
Qi Feng881.98