File:Sicily hotspot ESA394941.jpg
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Summary
[edit]DescriptionSicily hotspot ESA394941.jpg |
English: Launched on 25 April 2018, Sentinel-3B has already delivered some impressive first images from itsocean and land colour instrument, from itsaltimeterand from the optical channels of itsradiometer. With the radiometer’s thermal-infrared channels now turned on, the satellite completes its set of firsts with an image that depicts thermal signatures over southern Italy, the Mediterranean Sea and Sicily – with the hotspot of Mount Etna clearly visible. This image shows the ‘brightness temperature’, which corresponds to radiation emitted from the surface. Further processing is needed to turn this into an actual temperature map. The land surface is shown in red–orange colours, corresponding to a brightness temperature range of 296–320K. The blue colours over the ocean correspond to a range of 290–295K. The dark blue–black areas correspond to clouds, which are opaque to thermal-infrared radiation and so prevent a view of the ocean or land surface.
Mount Etna, Europe’s largest and most active volcano, appears much hotter than the surrounding land. In a state of almost continuous unrest, the volcano is currently classified as having ‘minor activity’. Over the oceans, the Sentinel-3 radiometer is important for providing sea-surface temperature measurements for oceanographic and weather forecasting centres. Over land, the instrument can be used, in particular, to monitor urban heat islands and wildfires. Sentinel-3B joins its identical twin, Sentinel-3A, in orbit. This pairing of satellites increases coverage and data delivery for the European Union’s Copernicus environment programme. |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2018/06/Sicily_hotspot |
Author | European Space Agency |
Permission (Reusing this file) |
contains modified Copernicus Sentinel data (2018), processed by ESA,CC BY-SA 3.0 IGO |
Other versions |
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Title InfoField | Sicily hotspot |
System InfoField | Copernicus |
Mission InfoField | Sentinel-3 |
Activity InfoField | Observing the Earth |
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This image contains data from a satellite in the Copernicus Programme, such as Sentinel-1, Sentinel-2 or Sentinel-3. Attribution is required when using this image.
Attribution: Contains modified Copernicus Sentinel data {{{year}}}
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:55, 5 June 2018 | 1,090 × 1,253 (184 KB) | Fæ (talk | contribs) | European Space Agency, Id 394941, http://www.esa.int/spaceinimages/Images/2018/06/Sicily_hotspot, User:Fæ/Project_list/ESA |
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Date and time of data generation | 11:16, 1 June 2018 |
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Width | 1,090 px |
Height | 1,253 px |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Image data location | 27,248 |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 1,253 |
Bytes per compressed strip | 4,097,310 |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2018 (Windows) |
File change date and time | 14:12, 4 June 2018 |
Date and time of digitizing | 11:16, 1 June 2018 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |