Tracking the 2018-2019 lava dome of Merapi volcano, Indonesia, using TanDEM-X and Pléiades

This repository consists of a series of topographic surfaces of Merapi volcano (Indonesia), presented as a series of Digital Elevation Models (DEMs) differences with respect to a reference DEM of 2013. They are obtained from multiple Pléiades stereoscopic surveys acquired in 2019 and from TanDEM-X acquisitions between 2018-2019. These DEMs differences (5 Pléiades and 15 TandEM-X) are used to calculate thicknesses of a lava dome that appeared in August 2018. We then computed volumes and effusion rates from these DEMs.

The resolution of the DEMs is 3*3 m pixel size and DEMs are georeferenced and provided under TIFF format.

Pléiades DEMs have been masked (Nans) on areas covered by clouds.

TanDEM-X DEMs have been masked (Nans) on areas that have not been unwrapped. They have also been corrected from a vertical offset by susbstracting the mean of non deformed areas to the initial DEM.

Files are formatted as followed :

-for Pléiades : YYYYMMDD_PL_msk.tiff

-for TanDEM-X : YYYYMMDD_TDX_offset.tiff

For the methodology to produce these DEMs, and for the applications of these DEMs, please refer to the recentely published paper "Tracking the evolution of the summit lava dome of Merapi volcano between 2018 and 2019 using DEMs derived from TanDEM-X and Pléiades data" with the following doi : https://doi.org/10.1016/j.jvolgeores.2022.107732

or the following URL : https://www.sciencedirect.com/science/article/pii/S0377027322002633