Observing the Earth from
                   the space.
                A Satellite Radar
                   Application

 ...
Introduction
 • Background




      –     Land reclamation
      –     Soft unconsolidated soil
      –     Expected subs...
Introduction
 • Monitoring with Remote Sensing
      – Sensors apart from objects
      – Measurement--> Energy emitted/re...
Introduction
 • Remote Sensing Techniques
                                                 Active+Microwave+Satellite

   ...
Remote Sensing with Satellite
                 RADAR
 • Radar Satellite Orbits


      –     Elliptical
      –     Near P...
Remote Sensing with Satellite
                  RADAR
 • Active Sensor


      – Measurement:
            Backscattering

...
Remote Sensing with Satellite
                  RADAR
 • Polarization Dependent
      – Example
            • Horizontal+V...
Remote Sensing with Satellite
                  RADAR
 • Synthetic Aperture Radar (SAR)




30-Mar-10                     ...
Remote Sensing with Satellite
                  RADAR
 • Complex Waveform
      – Parameter: Amplitude
            • Conve...
Remote Sensing with Satellite
                  RADAR
 • Interferometric SAR




30-Mar-10                               10
Remote Sensing with Satellite
                  RADAR
 • Interferometric SAR
      – Major limitation
            • Tempor...
Remote Sensing with Satellite
                  RADAR
 • Persistent Scatterer InSAR (PSInSAR)




30-Mar-10               ...
Remote Sensing with Satellite
                  RADAR
 • Persistent Scatterer InSAR (PSInSAR)




30-Mar-10               ...
PSInSAR. Past Case Studies




 • Deformation near the Wieliczka Salt
   Mine in Poland




30-Mar-10                     ...
Salt Mine in Poland

 • Subject and Motivations of the Study




30-Mar-10                                 15
Salt Mine in Poland

 • Available Data




                              • 51 images ERS-1/2
                             ...
Salt Mine in Poland
 • Experimental Results
      – PS density
            • Maximum=480 PS/km2 (center of Wieliczka)
    ...
Salt Mine in Poland

 • Experimental Results




30-Mar-10                          18
Salt Mine in Poland

 • Conclusions
      –     Slow subsidence detected by PSInSAR
      –     Proof of utility of SAR ar...
PSInSAR. Recent Case Studies

 • PSInSAR Analysis of damages during construction of
   parking near Koepoortbrug (Delft)
 ...
Koepoortbrug

 • Subject and Motivations of the Study




30-Mar-10                                 21
Koepoortbrug

 • Available Data




                                   • Envisat (ESA)
                                   ...
Koepoortbrug

 • Experimental Results



                                • Background:
                                Amp...
• Conclusions              Koepoortbrug
      –     Historic data → normal behavior
      –     Envisat data not suitable....
PSInSAR. Recent Case Studies

 • PSInSAR analysis of damages during construction of
   parking near Koepoortbrug (Delft)
 ...
Houtribdijk

 • Subject and Motivations of the Study




30-Mar-10                                 26
Houtribdijk

 • Available Data




                                  • Envisat (ESA)
                                  • 2...
Houtribdijk

 • Experimental Results




30-Mar-10                        28
Houtribdijk

 • Conclusions

            –   Denoise filtering smooths time series
            –   Optimization: Triangula...
PSInSAR. Recent Case Studies

 • PSInSAR analysis of damages during construction of
   parking near Koepoortbrug (Delft)
 ...
Spoorzone Delft

 • Subject and Motivations of the Study




30-Mar-10                                 31
Spoorzone Delft

 • Available Data



       38--- 40.5°                22.5--- 25.5°




30-Mar-10                       ...
Spoorzone Delft

 • Experimental Results




30-Mar-10                        33
Spoorzone Delft

 • Experimental Results


                                 IKEA
                                 parking:...
Spoorzone Delft

 • Experimental Results
      – Correction of Geolocation (Reference: AHN&AHN2)
            • Vertical of...
Spoorzone Delft

 • Experimental Results
      – Correction of Geolocation (Reference: AHN&AHN2)
            • Horizontal ...
Spoorzone Delft

 • Experimental Results
      – Correction of Geolocation (Reference: AHN&AHN2)
            • Cross Secti...
Spoorzone Delft

 • Experimental Results
      – Combination of Ascending/Descending Orbits




30-Mar-10                 ...
Spoorzone Delft

 • Experimental Results
      – Combination of Ascending/Descending Orbits


     ASCENDING
     ORBIT


...
Spoorzone Delft

 • Experimental Results
      – Thermal Expansion

                                 Power of the techniqu...
Spoorzone Delft

 • Experimental Results
      – Thermal Expansion

                                     Vermeer
         ...
Spoorzone Delft

 • Experimental Results
      – Detectable Deformation




            Side tilt      Subsidence   Front ...
Conclusions


• Power
   – Historic archive (past/future)
   – Large coverage
   – Cost
   – Processing improvements

 • I...
Upcoming SlideShare
Loading in …5
×

Presentacion Deltares

743 views
670 views

Published on

Feasibility study on ground motion monitoring with sun-synchronous
satellite Radar observations.

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
743
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
14
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Presentacion Deltares

  1. 1. Observing the Earth from the space. A Satellite Radar Application Álvaro Muñoz Supervisor: Victor Hopman 30-Mar-10 1
  2. 2. Introduction • Background – Land reclamation – Soft unconsolidated soil – Expected subsidence – Need for monitoring 30-Mar-10 2
  3. 3. Introduction • Monitoring with Remote Sensing – Sensors apart from objects – Measurement--> Energy emitted/reflected 30-Mar-10 3
  4. 4. Introduction • Remote Sensing Techniques Active+Microwave+Satellite • Source of Energy • Active/Pasive • Electromagnetic Spectrum • Optical/Thermal/Microwave • Platform • Manned-Unmanned Plane/Helicopter • Kites • Satellite 30-Mar-10 4
  5. 5. Remote Sensing with Satellite RADAR • Radar Satellite Orbits – Elliptical – Near Polar – Sun-Synchronous – Height • 500-1000 km 30-Mar-10 5
  6. 6. Remote Sensing with Satellite RADAR • Active Sensor – Measurement: Backscattering 30-Mar-10 6
  7. 7. Remote Sensing with Satellite RADAR • Polarization Dependent – Example • Horizontal+Vertical polarization • Acquisition Geometry – Azimuth (along track) – Range (cross track) 30-Mar-10 7
  8. 8. Remote Sensing with Satellite RADAR • Synthetic Aperture Radar (SAR) 30-Mar-10 8
  9. 9. Remote Sensing with Satellite RADAR • Complex Waveform – Parameter: Amplitude • Conventional SAR • Complex Waveform – Parameter: Phase • Interferometric SAR 30-Mar-10 (InSAR) 9
  10. 10. Remote Sensing with Satellite RADAR • Interferometric SAR 30-Mar-10 10
  11. 11. Remote Sensing with Satellite RADAR • Interferometric SAR – Major limitation • Temporal decorrelation 30-Mar-10 11
  12. 12. Remote Sensing with Satellite RADAR • Persistent Scatterer InSAR (PSInSAR) 30-Mar-10 12
  13. 13. Remote Sensing with Satellite RADAR • Persistent Scatterer InSAR (PSInSAR) 30-Mar-10 13
  14. 14. PSInSAR. Past Case Studies • Deformation near the Wieliczka Salt Mine in Poland 30-Mar-10 14
  15. 15. Salt Mine in Poland • Subject and Motivations of the Study 30-Mar-10 15
  16. 16. Salt Mine in Poland • Available Data • 51 images ERS-1/2 (ESA) • 1992 to 2000 •Repeat cycle 34 days • Single orbit direction 30-Mar-10 16
  17. 17. Salt Mine in Poland • Experimental Results – PS density • Maximum=480 PS/km2 (center of Wieliczka) • Minimum=30 PS/km2 (sparse urbanization areas) • Average=92 PS/km2 – Comparison with subsidence maps Agreement • Leveling data 1970-2000 • PSInSAR data 1992-2000 – Field investigation • Interpretation of Observations 30-Mar-10 17
  18. 18. Salt Mine in Poland • Experimental Results 30-Mar-10 18
  19. 19. Salt Mine in Poland • Conclusions – Slow subsidence detected by PSInSAR – Proof of utility of SAR archive – Agreement leveling data – More PS density --> Urban areas – PS on landslide area • Variability • Horizontal displacement limitation of PSInSAR – Field inspection • Confirmation of PSInSAR observations • Hope for risk assessment 30-Mar-10 19
  20. 20. PSInSAR. Recent Case Studies • PSInSAR Analysis of damages during construction of parking near Koepoortbrug (Delft) • Filter optimization for PSInSAR analysis – Houtribdijk • Monitoring Spoorzone Delft with PSInSAR 30-Mar-10 20
  21. 21. Koepoortbrug • Subject and Motivations of the Study 30-Mar-10 21
  22. 22. Koepoortbrug • Available Data • Envisat (ESA) • 2003 to 2006 •Every 35 days • Single orbit direction 30-Mar-10 22
  23. 23. Koepoortbrug • Experimental Results • Background: Amplitude SAR • Overlaid: PS area of interest 30-Mar-10 23
  24. 24. • Conclusions Koepoortbrug – Historic data → normal behavior – Envisat data not suitable. Reasons: – Very sudden deformations – Undersampling (35 day repetition rate) – Possible change of orientation • Temporal decorrelation – Repair works • Solution – Another data set • Higher repetition rate • Shorter wavelength (improve detectability) 30-Mar-10 24
  25. 25. PSInSAR. Recent Case Studies • PSInSAR analysis of damages during construction of parking near Koepoortbrug (Delft) • Filter optimization for PSInSAR analysis – Houtribdijk • Monitoring Spoorzone Delft with PSInSAR 30-Mar-10 25
  26. 26. Houtribdijk • Subject and Motivations of the Study 30-Mar-10 26
  27. 27. Houtribdijk • Available Data • Envisat (ESA) • 2003 to 2007 •Every 35 days • Single orbit direction 30-Mar-10 27
  28. 28. Houtribdijk • Experimental Results 30-Mar-10 28
  29. 29. Houtribdijk • Conclusions – Denoise filtering smooths time series – Optimization: Triangular filter. Length 10-12 months – Similar Performance: Gaussian filter > 12 months 30-Mar-10 29
  30. 30. PSInSAR. Recent Case Studies • PSInSAR analysis of damages during construction of parking near Koepoortbrug (Delft) • Filter optimization for PSInSAR analysis – Houtribdijk • Monitoring Spoorzone Delft 30-Mar-10 30
  31. 31. Spoorzone Delft • Subject and Motivations of the Study 30-Mar-10 31
  32. 32. Spoorzone Delft • Available Data 38--- 40.5° 22.5--- 25.5° 30-Mar-10 32
  33. 33. Spoorzone Delft • Experimental Results 30-Mar-10 33
  34. 34. Spoorzone Delft • Experimental Results IKEA parking: • Soil subsidence 30-Mar-10 34
  35. 35. Spoorzone Delft • Experimental Results – Correction of Geolocation (Reference: AHN&AHN2) • Vertical offset (estimated height) 30-Mar-10 35
  36. 36. Spoorzone Delft • Experimental Results – Correction of Geolocation (Reference: AHN&AHN2) • Horizontal offset (estimated azimuth and range) 30-Mar-10 36
  37. 37. Spoorzone Delft • Experimental Results – Correction of Geolocation (Reference: AHN&AHN2) • Cross Sections 30-Mar-10 37
  38. 38. Spoorzone Delft • Experimental Results – Combination of Ascending/Descending Orbits 30-Mar-10 38
  39. 39. Spoorzone Delft • Experimental Results – Combination of Ascending/Descending Orbits ASCENDING ORBIT DESCENDING ORBIT 30-Mar-10 39
  40. 40. Spoorzone Delft • Experimental Results – Thermal Expansion Power of the technique: • Detect thermal expansion in high buildings Correlation: • PSInSAR thermal theory 30-Mar-10 40
  41. 41. Spoorzone Delft • Experimental Results – Thermal Expansion Vermeer Toren: • 7,3mm vertical deformation • (Thermal expansion) 30-Mar-10 41
  42. 42. Spoorzone Delft • Experimental Results – Detectable Deformation Side tilt Subsidence Front tilt 1 mm 1.09 mm 7.7 mm 30-Mar-10 42
  43. 43. Conclusions • Power – Historic archive (past/future) – Large coverage – Cost – Processing improvements • Interpretation of observations not straightforward • PS → physical entities? PSInSAR can provide mm accuracy in detection of deformation Monitoring Structures → Damage prevention 30-Mar-10 43

×