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Fabio Rocca

Envisat for the physics of the land surfaces. Fabio Rocca. Dipartimento di Elettronica e Informazione Politecnico di Milano. ASAR, the Advanced Synthetic Aperture Radar has new powerful capabilities: - electronically steered antenna

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Fabio Rocca

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  1. Envisat for the physics of the land surfaces Fabio Rocca Dipartimento di Elettronica e Informazione Politecnico di Milano

  2. ASAR, the Advanced Synthetic Aperture Radar has new powerful capabilities: - electronically steered antenna - accessibility to a ~4 times wider swath and thus faster revisiting times - incidence angle range: 15 - 45 degrees - alternating polarization mode - solid state memory It will continue the sequence of C band images taken by ERS 1 - 2 since 1992.

  3. Multiswath illumination

  4. Single SAR image Multiple SAR image

  5. Multiple SAR image OPTICAL

  6. An area of Milano (~2,5x2,5 kmq)

  7. ERS-1 + SPOT Flooding: Mississipi river during Summer 1993

  8. Temporal variation of the backscatter of rice fields 1 ) Sowing Radar Backscatter 2 ) Tillering Sowing Tillering Floweirng Elongation 3 ) Elongation Reproductive phase Vegetative phase

  9. Java Map of rice fields derived multitemporal ERS-1 data. Semarang, Java, (Cyan: late rice Magenta: early rice Yellow: non rice)

  10. Alternating Polarisation modes Left: HH-HV sub-mode Right: HH-VV sub-mode 1

  11. IGN map SPOT XS image Deforestation damage analysis ERS tandem coherence before the storm ERS tandem coherence after the storm Damages estimate (coherence gradient in pink tones) Based on Spot Image coherence products SERTIT

  12. SAR interferometry in Iceland: Vatnajokull eruption

  13. USGS SAR interferometry in Alaska Volcano inflation during the eruption.

  14. Optimized IM/WSM Differential Interferometry: coseismic motion of Landers Earthquake Full resolution IM/IM

  15. Courtesy of CCRS Radarsat interferometry:ice velocity in Antarctica

  16. Interferometric motion analysis 27/9/95-12/9/96 Gepatsch Reservoir Ötztal Alps

  17. Bachu (China) Digital elevation models DEM with 10 m vertical precision are achievable; courtesy of DLR

  18. Terrain Motion in L.A., USA: 1992 - today

  19. Paris: terrain motion 1992-today

  20. Paris: La Villette Science Museum Correlation between building thermal dilation from SAR data and temperatures at the acquisitions times. RMSE = 1.1 mm

  21. Detecting a crack in a building from space T.R.E. Page 29 ENVISAT Press Day - ESTEC, 1 February 2001

  22. Conclusions ASAR is an invaluable tool for earth observations. Its principal applications will be: - agricultural, forest, and soil moisture monitoring - detecting land use changes - responding to natural hazards - geological exploration - topographic mapping - surface deformation measurements

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