sabri – Earth Observation | Satellite Remote Sensing | SAR | Thematic maps

Bark beetle infestation effects in Engelskirchen, Germany

The high revisitation time of Sentinel-2 optical satellite constellation, allow us to visualize the devastating effects on German woods caused by the bark beetle, whose population dramatically increased due to the succession of warmer winters and dryer summers. Here a video over the wood of Engleskirchen (North Rhine-Westphalia, Germany), prepared for Lifeterra project. http://www.melchionna.de/wp-content/uploads/2022/07/engelskirchen.mp4 First …

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EO-data for COVID-19 spread assessment

COVID-19, Sentinel-2, Urban / By sabri

A satellite image is worth a thousand words: a little study on detecting from space the increment of activities in cemeteries, due to outbreaks of COVID-19 infections. At the beginning of last year, I asked myself what I could do by using my own competences to help mitigate the impact of the Covid-19 pandemic. …

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Edersee Dam, Germany

Hydrology, Sentinel-1 / By sabri

The Eder reservoir, in Germany, was drastically affected by the long drought season experienced in Germany in 2018. With its nominal 11.8 km² reservoir, it has the 2nd largest area of all reservoirs in Germany. In November 2018, its area decreases to less than 3 km². In the figure above the thematic map for the …

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Castanhão Dam, Brazil

Hydrology, Sentinel-1 / By sabri

The lake formed by the Castanhão Dam in Brazil covered an original surface of 360 square kilometres. Since its opening in 2004, several drought events have taken place, which have reduced the lake surface of more than the 90%. Below the thematic map for the lake Castanhão on the 09th May 2017. The original lake …

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Alajuela Lake, Panama

Hydrology, Sentinel-1 / By sabri

This time the Copernicus Sentinel-1 mission brings us over central America, on the area of the Panama Canal. The Panama Canal connects the Atlantic Ocean with the Pacific Ocean. A locks system lifts vessels up 26 meters to the main elevation of the Canal and down again. Traveling through its 77 km takes up to …

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Rink Glacier Velocity

Sentinel-1 / By sabri

The monitoring of the ice mass lost by the glaciers is critical in order to predict the sea level rise. The Rink Glacier is a major outlets to the ocean in Greenland, and the fastest moving ice surface in the world. Recently scientists from NASA’s Jet Propulsion Laboratory in Pasadena, California, reported that in 2010 and …

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Polarimetric view of Apulia, Italy

Sentinel-1 / By sabri

One of the challenges of a scientist working with radar satellite imagery, who also wants to provide her products to the end-user community, is the final visualization of the results. Representations of radar measures are usually black and white, blurry, distorted, speckled images. This is because radar instruments do not measure visible radiation, but -mainly- …

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Land cover change detection over Apulia, Italy

Sentinel-1 / By sabri

Every 12 days the relative orbit 146 brings Sentinel-1A satellite over the region of Apulia in the south of Italy. Apulia is the less mountainous region of Italy; the scarcity of precipitations and its karstic nature make it poor of surface watercourses. Here we see a multi-temporal color composite of land cover from the Adriatic …

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