TerraSAR-X despeckled images of Popocatépetl crater (2012-2020)

This dataset consists of high-resolution satellite radar imagery (TerraSAR-X) of Popocatépetl volcano's active crater, acquired between 2012-2020. It was generated for the publication by Valade et al. (2023):

Valade S., Coppola D., Campion R., Ley A., Boulesteix T., Taquet N., Legrand D., Laiolo M., Walter T. R., De la Cruz-Reyna S. (2023) "Lava dome cycles reveal rise and fall of magma column at popocatépetl volcano", Nature Communications, doi: 10.1038/s41467-023-38386-9

Images contained in this dataset are radar intensity images, which have been filtered to remove speckle using a specifically trained convolutional neural network (Ley, A. & Valade, S. (2023) Andreas-Ley/S2S-TSX-Colima: Version v1.0.4, doi: 10.5281/zenodo.7838864; see details in Valade et al. 2023). These include a total of 158 descending track acquisitions (horizontal polarization HH), of which 127 were acquired in spotlight-mode (range pixel spacing = 0.91 m, azimuth pixel spacing = 1.27 m), and 31 in stripmap-mode (range pixel spacing = 1.36 m, azimuth pixel spacing = 1.86 m). In order to make the stack of images consistent, the raw images were successively filtered, resized, aligned, cropped, normalized, and flipped from left to right. The images are displayed in radar geometry, i.e. with respect to the radar sensor itself: the image y-axis corresponds to the satellite motion direction ("azimuth" direction, here the satellite is traveling from image top to bottom, corresponding to N°190), and the image x-axis corresponds to the radar look direction ("range" direction, here the radar is looking from image right to left). A video animation of the images contained in this dataset is provided as Supplementary Video 1 in Valade et al. 2023.

Raw TerraSAR-X products were provided by the German Aerospace Center (DLR) to Prof. Thomas R. Walter (GFZ-Potsdam) under the project TSX-ID 1505.