Remote Sens. 2012, 4(4), 975-986; doi:10.3390/rs4040975
Article

An Empirical Assessment of Temporal Decorrelation Using the Uninhabited Aerial Vehicle Synthetic Aperture Radar over Forested Landscapes

1 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA 2 Department of Geography, University of Maryland, College Park, MD 20742, USA
* Author to whom correspondence should be addressed.
Received: 13 February 2012; in revised form: 28 March 2012 / Accepted: 28 March 2012 / Published: 2 April 2012
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Abstract: We present an empirical assessment of the impact of temporal decorrelation on interferometric coherence measured over a forested landscape. A series of repeat-pass interferometric radar images with a zero spatial baseline were collected with UAVSAR (Uninhabited Aerial Vehicle Synthetic Aperture Radar), a fully polarimetric airborne L-band radar system. The dataset provided temporal separations of 45 minutes, 2, 7 and 9 days. Coincident airborne lidar and weather data were collected. We theoretically demonstrate that UAVSAR measurement accuracy enables accurate quantification of temporal decorrelation. Data analysis revealed precipitation events to be the main driver of temporal decorrelation over the acquisition period. The experiment also shows temporal decorrelation increases with canopy height, and this pattern was found consistent across forest types and polarization.
Keywords: radar; forest; height; interferometry; temporal decorrelation; repeat-pass; PolinSAR

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MDPI and ACS Style

Simard, M.; Hensley, S.; Lavalle, M.; Dubayah, R.; Pinto, N.; Hofton, M. An Empirical Assessment of Temporal Decorrelation Using the Uninhabited Aerial Vehicle Synthetic Aperture Radar over Forested Landscapes. Remote Sens. 2012, 4, 975-986.

AMA Style

Simard M, Hensley S, Lavalle M, Dubayah R, Pinto N, Hofton M. An Empirical Assessment of Temporal Decorrelation Using the Uninhabited Aerial Vehicle Synthetic Aperture Radar over Forested Landscapes. Remote Sensing. 2012; 4(4):975-986.

Chicago/Turabian Style

Simard, Marc; Hensley, Scott; Lavalle, Marco; Dubayah, Ralph; Pinto, Naiara; Hofton, Michelle. 2012. "An Empirical Assessment of Temporal Decorrelation Using the Uninhabited Aerial Vehicle Synthetic Aperture Radar over Forested Landscapes." Remote Sens. 4, no. 4: 975-986.

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