About the Transferability of Topographic Correction Methods From Spaceborne to Airborne Optical Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

Rudolf Richter¹  Daniel Schlapfer²  Mathias Kneubuhler³  Andreas Hueni³  Michael E. Schaepman³  Marius Vogtli³ 

[1] German Aerospace Center (DLR), Wessling, Germany;ReSe Applications LLC, Wil, Switzerland;University of Zurich, Zurich, Switzerland;

关键词: Airborne;    rugged terrain;    spaceborne;    topographic correction;   

DOI  :  10.1109/JSTARS.2020.3039327

来源: DOAJ

【 摘 要 】

In rugged terrain, topography substantially influences the illumination and observation geometry, and thus, the bidirectional reflectance distribution function (BRDF) of a surface. While this problem has been known and investigated for spaceborne optical data since the 1980s, it has led to several well-known topographic correction methods. To date, the methods developed for spaceborne data were equivalently applied to airborne data with distinctly higher spatial resolution, illumination/observation angle configurations and finally (instantaneous) field of view (FOV). On the one hand, this article evaluates, whether such a transfer of methods from spaceborne to airborne acquisitions is reasonable. On the other hand, a new Lambertian/statistical-empirical correction method is introduced. While in the spaceborne case the Modified Minnaert (MM) and the Statistical-Empirical (SE) methods performed best, MM led to the statistically and visually best compromise for the airborne data. Our results suggest further that with a higher spatial resolution various effects come into play (FOV widening; changing the fraction of geometric, volumetric and isotropic scattering, etc.), compromising previously successful methods, such as the SE method.

【 授权许可】

Unknown