Visualizing satellite images captured over volcanos and wildfires in various spectral bands
- 🌟 Introduction
- 🔍 Sentinel-2 (Spectral Bands)
- 🌐 Downloading Sentinel-2 Images
- ⚙️ Processing Sentinel-2 Images (Clipping and Resampling)
- 🌋 Visualization of Sentinel-2 Images (Volcano)
- 🔥 Visualization of Sentinel-2 Images (Wildfire)
- 📄 Conclusion
- 📚 References
🌟 Introduction
As you could know, our eyes can only see objects within the visible region (the bands of blue, green, and red). Nonetheless, when light hits an object and reflects, it accommodates information in other spectral regions, similar to infrared. Infrared light can effectively penetrate and go through dense gases, similar to smoke, providing a transparent view beneath the smoke. Nonetheless, Our eyes usually are not in a position to see objects within the infrared region, unlike some animals like snakes that may see a portion of infrared of their vision. Throughout the last a long time, there was significant advancement in the event of sensors for detecting infrared light. These sensors have been utilized in practical applications.
I actually have at all times been searching for a great example as an instance how satellites can detect crucial information within the infrared region, which is invisible to our naked eyes. Last week, I read in regards to the Iceland volcano that had grow to be lively for the third time since December 2023. It sparked an idea in my mind to envision the photographs captured by satellites over the volcano. I hoped to be lucky enough to seek out a transparent satellite image of the smoke plume from the volcano, demonstrating how light scatters within the visible region while penetrating through the smoke within the infrared region to disclose lava flows.
I checked a few satellites, and guess what? There was one with the proper timing! The volcano erupted on Thursday morning (Feb eighth), and the Sentinel-2 overpass occurred on Feb eighth around noon. I believed this might be an ideal example to display how…