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João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 1 Mapping and monitoring earth dynamics from aerial imagery and InSAR João Catalão.

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Apresentação em tema: "João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 1 Mapping and monitoring earth dynamics from aerial imagery and InSAR João Catalão."— Transcrição da apresentação:

1 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 1 Mapping and monitoring earth dynamics from aerial imagery and InSAR João Catalão LATTEX-IDL, University of Lisbon 109th Science Committee Meeting

2 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 2 Faculty of Sciences – University of Lisbon

3 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 3 LATTEX - IDL – Instituto D. Luis

4 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 4 Research activities/objectives Geoid, Gravity Field Engineering projects (Cartographic production, photogrammetric applications) Remote Sensing (Interferometry - InSAR) Integration of multi-source geodetic data. This includes the integration of old geodetic measuring techniques, such as gravity and geoid, and also GPS, INSAR and satellite altimetry data assimilated into a dynamical mathematical model that reproduces the 4D position and velocity.

5 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 5 Engineering projects 1.Photogrammetric analysis of the coastal erosion in Algarve (Portugal). Géomorphologie, nº 2, pp , Mean cliff retreat rate tendencies for Forte Novo - Garrão (Algarve - Portugal). Thalassas, 19(2b), , Airborne GPS / IMU integration for coastal studies in Ria Formosa. 4.Measurement and monitoring landslides and cliff instability from multitemporal aerial photos. 5.A video-based technique for mapping intertidal beach bathymetry. (Engineering solutions for coastal dynamics studies)

6 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 6 J. Catalão (1), C. Catita (1), J.M. Miranda (1), J. A. Dias (2) (1) LATTEX, IDL, University of Lisbon (2) University of Algarve Photogrammetric analysis of the coastal erosion in Algarve (Olhos de Água – Quarteira) Photogrammetric analysis of the coastal erosion in Algarve (Portugal)." Géomorphologie, nº 2, pp , 2002.

7 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 7 Evaluate the applicability of photogrammetric techniques to the monitoring of coastal erosion based on a long-term multi- temporal set of metric photos, running from 1938 to Objective The study area corresponds to a segment of the Algarve coast between Olhos de Água beach and Quarteira river. Due to the irregularity of the erosion processes near the natural water lines, we selected two study zones.

8 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 8 Study Area photo

9 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 9 Study Area photo Vilamoura Marine Falésia Beach

10 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 10 Methodology Determination of photogrammetric points for the most recent photos Perform a multi-temporal aerotriangulation Photogrammetric profiles Construction of a DTM Linear analysis and volume computation Positional and temporal uncertainty Accuracy estimation

11 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 11 Data 1. Determination of the internal and external orientation parameters. 2. Multi-temporal aerotriangulation with 1995, 1976 and 1972 epochs. We use this framework to determine natural control points for the 1976 and 1972 surveys. After computation of the external orientation parameters of the 1972 survey, similar operation was made in what concerns the 1969, 1958 and 1938 epochs.

12 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 12 Digitised Features

13 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 13 Photogrammetric profiles

14 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 14 Photogrammetric profiles

15 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 15 Cliff top line evolution

16 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 16 Time evolution of the cliff geometry

17 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 17 Positional uncertainty 0.76 m + 14 m x Scale (misinterpretation of the delimitation) gives 1.1 m

18 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 18 Positional uncertainty Upper limit Lower limit Lower : 0.14 m yr-1 Upper: 0.20 m yr-1

19 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 19 Airborne GPS / IMU integration for coastal studies in Ria Formosa. Célia Sousa, J. Catalão Mean cliff retreat rate tendencies for Forte Novo - Garrão (Algarve - Portugal) S. Oliveira, J. Catalão, J. Dias

20 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 20 Objective 1.Integration of GPS/IMU coordination system on the aerotriangulation process (using BINGO software). Multiparametric AT with GPS+IMU+Photogrametric points. 2.Evaluation of the effect of photogrammetric points reduction on the aerotriangulation process and its effect on the derived photogrammetric restitution. 3.To develop a comprehensive evolutionary model for Forte Novo - Garrão shoreline/cliff retreat rate and its relation with close man made constructions, Quarteira fishing harbour and Vale do Lobo artificial beach nourishment. (Evaluation of cliff retreat and beach nourishment in Southern Portugal through photogrammetric techniques, S. Cruz de Oliveira, J. Catalão, Ó. Ferreira & J. M. Alveirinho Dias, sent to Journal of Coastal Research.)

21 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 21 Study Area Lagoon system with a 60 km dune chain In this conditions how can we do the aerial photo orientation?

22 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 22 Aerial photos strips 4 Surveys: (GPS) 2001 (GPS+IMU)

23 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 23 External orientation determination 1991, 1999, 2000, 2001 – AeroTriangulation GPS+INS TA +GPS+IMU TA +GPS+IMU (reducing the number of PFs) 2001 Survey with GPS+IMU

24 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 24 Photogrammetric points determination

25 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 25 Statistics for Quarteira-Ancão Std X (m)Std Y (m)Std H (m) Std (°) Std k (°) TA – IMU IMU - TA/IMU TA - TA/IMU Mean X (m)Mean Y (m)Mean H (m) mean (°)Mean (°) mean k (°) TA - IMU IMU - TA/IMU TA - TA/IMU TA and GPS/IMU differences along the strip

26 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 26 Standard deviation of the photogrammetric points coordinates as a function of the number of PFs used on the TA with GPS+IMU Photogrammetric points reduction

27 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa Cliff top line 2001 Cliff top line 1999 Cliff top line 1991 Data integration and Analysis

28 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 28 Retreat Rate East groin of Quarteira

29 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 29 InSAR Projects C. Catita & J. Catalão LATTEX, IDL, University of Lisbon

30 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 30 Projects - FCT SARAZORES - Deformation Partition in Azores using interferometric SAR Images ( ) The main goal of this project was to develop an integrated technique, based on SAR interferometry and GPS, to measure inter-seismic, co-seismic, and post-seismic deformation and the partition of the deformation between volcanic and tectonic effects, by relating these to seismicity and geological structures, and probe plate boundary kinematics. KARMA - Kinematics and Rheological Modelling of the Nubian- Eurasian plate boundary in the Azores ( ) The specific objectives of this project are: 1. Implementation of a near-real time continuous GPS network, 2. Processing and interpretation of a SAR multi- temporal imagery over Faial Island using interferometric techniques (with radar reflectors) to infer ground deformation, 3...., etc..

31 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 31 Projects - ESA 1. Deformation Partition in Azores using interferometric SAR images. ESA-EO, CAT-1 project, no Ground deformation of Azores islands based on INSAR, corner reflectors and GPS. ESA-EO, CAT-1 project, no 3149.

32 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 32 The July 9, 1998 Pico-Faial, Azores, Earthquake: Co-seismic Deformation Detected by Radar Interferometry C. Catita, J. Catalão, M. Miranda, L.M.Victor Time series analysis of SAR data applied to the study of the co-seismic deformation of the 9th July 1998 Pico-Faial (Azores) earthquake. International Journal of Remote Sensing, Vol. 26, No 13, 10 July 2005,

33 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 33 The July 9, 1998 Pico-Faial, earthquake Time: 05:19:15 (GMT); Time: 05:19:15 (GMT); Magnitude: Magnitude: Mw = 6.1 Epicenter : Epicenter : 38º ± 2.2 N, 28º ± 3.4 E More than 150 aftershocks observed between 9th and 15th of July. More than 150 aftershocks observed between 9th and 15th of July.

34 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 34 Previous Geodetic Studies TANGO Project ( TransAtlantic Network for Geodynamics and Oceanography ) GPS measurements in 1993, 1994, 1997 e 1999 GPS measurements in 1993, 1994, 1997 e 1999 IGP (Instituto Geográfico Português) observations GPS observations in 1997 GPS re-observations in August of 1998 (Faial) : 30 sites No GPS data available in PICO Island. Fernandes, R. M. S., J. M. Miranda, J. Catalão, J. F. Luis, L. Bastos, B.A.C. Ambrosious (2002) Coseismic Displacements of the Mw=6.1, July 9, 1998, Faial Earthquake (Azores, North Atlantic). Geophysical Research Letters, Vol. 29, N. 16, pp. 21-1, DOI: /2001GL

35 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 35 Inversion of GPS data was performed using a non linear generalized algorithm.2 solutions were studied. Coseismic displacement modeling derived from the geodetic studies

36 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 36 ERS1 and ERS2 images SECOND TRACK FIRST TRACK Radar Images. 17 images acquired between 1992 and interferograms produced; 17 images acquired between 1992 and interferograms produced; 2 independent tracks (descending orbits) ;2 independent tracks (descending orbits) ; To use SAR Interferometry to characterize the coseismic displacement field and determine if there is agreement with the previous geodetic studies. To use SAR Interferometry to characterize the coseismic displacement field and determine if there is agreement with the previous geodetic studies.

37 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 37 Methodology To isolate surface deformations from the interferograms, the topography was removed by subtracting a synthetic fringe produced by using the DEM of the area of interest (DEME approach developed by CNES). To isolate surface deformations from the interferograms, the topography was removed by subtracting a synthetic fringe produced by using the DEM of the area of interest (DEME approach developed by CNES). A DEM was produced by digitizing contour lines and spot height data from the existing 1:25000 scale topographic maps produced by the Instituto Geográfico do Exército (horizontal resolution 20 m and vertical accuracy 5 m). A DEM was produced by digitizing contour lines and spot height data from the existing 1:25000 scale topographic maps produced by the Instituto Geográfico do Exército (horizontal resolution 20 m and vertical accuracy 5 m). On the presented interferograms, the magnitude of the expected topographic artifact was estimated to be of the order of: On the presented interferograms, the magnitude of the expected topographic artifact was estimated to be of the order of: (best co-seismic pair) rms/Ha 1/55 cycles or 0.5 mm in range (best co-seismic pair) rms/Ha 1/55 cycles or 0.5 mm in range (worst co-seismic pair) rms/Ha 1/16 cycles or 1.7 mm in range (worst co-seismic pair) rms/Ha 1/16 cycles or 1.7 mm in range

38 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 38 FIRST TRACK INTERFEROGRAMS IN DEM GEOMETRY Interferogram A Interferogram B

39 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 39 SECOND TRACK INTERFEROGRAMS IN DEM GEOMETRY Interferogram C Interferogram D

40 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 40 Synthetic Interferograms Unit vector pointing from the ground toward the satellite: [east, north, up] = [-0.341,0.075,-0.937]

41 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa Despite several unfavorable factors and the consequent low level of coherence, the interferometry SAR method has been successfully used for measuring the ground displacement changes in Pico Island. 2. The deformation pattern observed on NW of Pico Island (3 to 4 cm of range change, which correspond to an increase in ground-to-radar distance between the two acquisition dates) agrees well with the previous geodetic results and the theoretical model presented by Fernandes et al. [2002]. We interpret this range change as the expression of elastic deformation generated by the July 9 th Faial earthquake Conclusions

42 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 42 KARMA Project ( )

43 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 43

44 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 44 Coherence DEM

45 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 45 Interferogram After DEM removal

46 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 46 Amplitude image and Persistent Scaterrers PS obtained from amplitude dispersion

47 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 47 Corner Reflectors

48 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 48 Corner Reflectors

49 João Catalão Out/2006 Faculdade de Ciências da Universidade de Lisboa 49 Welcome to Lisbon Welcome to Portugal Thank you


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