Interferometric Ground Cancellation for Above Ground Biomass Estimation
Artikel i vetenskaplig tidskrift, 2020

A new processing technique, i.e., ground cancellation, which removes the ground signal from a pair of interferometric synthetic aperture radar (SAR) images, is used to emphasize the response from above-ground targets. This technique is of particular interest when studying forest canopies using low-frequency signals able to reach the underlying ground, in which case the portion of the signal coming from the ground interferes with the recovery of information about the vegetation. We demonstrate that the power in ground-canceled P-band HV SAR data gives significantly higher correlations with above-ground biomass (AGB) than the interferometric images considered separately. In addition, a significant increase in the sensitivity of backscatter to AGB is observed. Ground-canceled power may then be modeled or regressed to estimate AGB; these possibilities are not discussed here as they will be the topic of forthcoming publications. The effectiveness of this technique is proven through simulations and analysis of real data gathered on tropical forests. The stability of the technique is analyzed under the digital terrain model and baseline control errors, and compensation strategies for these errors are presented.

tomography

Carbon

Vegetation mapping

biomass

tropical

Synthetic aperture radar

interferometry

forest

Azimuth

Biomass

Above-ground biomass (AGB)

synthetic aperture radar (SAR)

Forestry

Radar imaging

Författare

Mauro Mariotti d'Alessandro

Politecnico di Milano

Stefano Tebaldini

Politecnico di Milano

Shaun Quegan

University of Sheffield

Maciej J. Soja

MJ Soja Consulting

University of Tasmania

Lars Ulander

Elektroteknik, datateknik, IT samt Industriell ekonomi

Klaus Scipal

Europeiska rymdorganisationen (ESA)

IEEE Transactions on Geoscience and Remote Sensing

0196-2892 (ISSN)

Vol. 58 9 6410-6419

Ämneskategorier

Sannolikhetsteori och statistik

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/TGRS.2020.2976854

Mer information

Senast uppdaterat

2020-10-08