Mount Semeru, the tallest and most active volcano on the Indonesian island of Java, has routinely spit up small, mostly harmless plumes of ash and gas for years. The circumstances changed on December 4, 2021. Following a partial collapse of the summit lava dome early in December, sensors began to detect elevated seismic activity, according to the Volcanological Survey of Indonesia (PVMBG). After more of Semeru’s lava dome gave way, billowing fronts of superheated ash, tephra, soil, and othe

Dear GIS users/colleagues, I have been learning how to use GIS and more specifically ArcGIS for more than a year (online course). I was able to build in my free time a portfolio of maps on topics which interest me or are related to my area of expertise. I displayed most of them in a StoryMap online, which I intend to use as my online portfolio to showcase my work to potential future employers. The only issue is that, my ArcGIS licence is expiring soon (end December/early Jan). I contac

Selecting the best Earth Observation (EO) optical payload for a satellite can be a defining choice for a research mission or commercial service. But with more models on the market than ever before, combined with innovation and supply chain changes in satellite buses, form factors, and sub-systems, making the right choice of EO camera can be difficult. In this webinar we delve into the factors that need to be weighed up during the selection process, featuring expert insights from 6 differen

A new study published today by journal PLOS ONE has revealed that mountaintop removal mining poses a more serious and widespread threat to endangered species and people than was previously understood. The researchers from Defenders of Wildlife's Center for Conservation Innovation (CCI) and conservation technology nonprofit SkyTruth, combine water-quality data with satellite imagery of mountaintop removal mining activity to estimate the full extent of water-quality degradation attributable to the

Hi. I am working on a remote sensing project about land degradation. I want to calculate TSAVI using a Landsat-8 image but I can't find how the a and b (slope and intercept) parameters are calculated. I only know that the variable X=0.08 according to the litterature. Can someone help me?