Work

Accuracy Assessment of a Digital Elevation Model Constructed Using the KOMPSAT-5 Dataset

Year: 2025

Type: article

Abstract: The Interferometric Synthetic Aperture Radar (InSAR) has significantly advanced in its usage for analyzing surface information such as displacement or elevation. In this study, we evaluated a digital elevation model (DEM) constructed using X-band KOMPSAT-5 interferometric datasets provided by the Korea Aerospace Research Institute (KARI). The 28-day revisit cycle of KOMPSAT-5 poses challenges in maintaining interferometric correlation. To address this, four KOMPSAT-5 images were employed in a multi-baseline interferometric approach to mitigate temporal decorrelation effects. Despite the slightly longer temporal baselines, the analysis revealed sufficient coherence (>0.8) in three interferograms. The height of ambiguity ranged from 59 to 74 m, which is a moderate height of sensitivity to extract topography over the study area of San Francisco in the USA. Unfortunately, only ascending acquisition mode datasets were available for this study. The derived DEM was validated against three reference datasets: Copernicus GLO-30 DEM, ICESat-2, and GEDI altimetry. A high coefficient of determination (R2 > 0.9) demonstrates the feasibility of the interferometric application of KOMPSAT-5.

Source: Remote Sensing

DOI: 10.3390/rs17050826

Authors: Je-Yun Lee, Sang-Hoon Hong, Kwang-Jae Lee, Joong-Sun Won

Institutions: Pusan National University, Korea Aerospace Research Institute, Yonsei University

Language: English

Topic: Synthetic Aperture Radar (SAR) Applications and Techniques

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,258

Funder: National Research Foundation of Korea