Enhanced Large-scale GEDI/TanDEM-X Fusion Forest Height Mapping by Reducing Orbit Effect

Abstract:
Combining spaceborne waveform lidar and InSAR data has been attractive to provide sub-hectare forest height after launch of GEDI mission. In this framework, this letter focuses on the improvement of forest height mapping in the combination of TanDEM-X (bistatic) interferometric coherence and GEDI waveform scheme by addressing variations in the reflectivity profile through geometric configurations. The enhanced height estimation performance can be successfully achieved by segmentation of TanDEM-X data by means of acquisition orbit. The analysis was carried out by processing 364 TanDEM-X scenes and about 15 million GEDI waveforms acquired in Tasmania forested island.