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Earth shifts in colour

27/03/2015 3640 views
ESA / Applications / Observing the Earth / Highlights

This gallery features a selection of results from the 2015 Fringe Workshop on advances in the science and applications of ‘SAR interferometry’.

Interferometric Synthetic Aperture Radar – or InSAR – is a remote sensing technique where two or more images over the same area are combined to detect slight changes occurring between acquisitions. Tiny changes on the ground cause changes in the radar signal and lead to rainbow-coloured interference patterns in the combined image, known as an ‘interferogram’.

The Fringe Workshop takes its name from these coloured fringes seen in the interferograms.

Precise measurements – down to a scale of a few millimetres – can be detected across wide areas. Tectonic plates grinding past one another, the slow ‘breathing’ of active volcanoes, the slight sagging of a city street through groundwater extraction, even the thermal expansion of a building on a sunny day.

The 2015 Fringe Workshop was held at ESRIN, ESA’s centre for Earth observation, in Frascati, Italy on 23–27 March.

  • Applications

    Greenland ice streams

    27/03/2015 2376 views 23 likes
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    Greenland ice streams
  • Applications

    Sentinel-1A interferogram, San Joaquin Valley

    27/03/2015 984 views 3 likes
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    Sentinel-1A interferogram, San Joaquin Valley
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    Vatican heights detected by satellite radar

    27/03/2015 1731 views 9 likes
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    Vatican heights detected by satellite radar
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    Tomographic Berlin

    27/03/2015 889 views 5 likes
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    Tomographic Berlin
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    Iraq and Eastern Turkey

    27/03/2015 1371 views 14 likes
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    Iraq and Eastern Turkey
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    Landslide risk monitoring with Sentinel-1

    27/03/2015 2420 views 13 likes
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    Landslide risk monitoring
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    Vestfonna and Austfonna shedding ice

    23/03/2015 819 views 10 likes
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    Vestfonna and Austfonna shedding ice
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    Campi Flegrei monitored by Sentinel-1

    23/03/2015 8530 views 87 likes
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    Campi Flegrei monitored by Sentinel-1
  • Applications

    Pine Island Glacier on Sentinel-1A’s radar

    25/03/2015 4579 views 83 likes
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    Pine Island Glacier on Sentinel-1A’s radar