Outline. From AGEA-JRC I (2007) to AGEA-JRC II ( ) COSMO-SkyMed constellation for Earth observation and applications

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1 Outline From AGEA-JRC I (2007) to AGEA-JRC II ( ) COSMO-SkyMed constellation for Earth observation and applications COSMO-SkyMed GeoAccuracy assessment o Geometric o Parcels measurements performances COSMO-SkyMed Thematic Mapping capabilities Conclusions Taormina Palazzo dei Congressi 19 Novembre

2 SAR Multitemporal Technique Collect 2/3 images within a short time interval (from 1 to 8 days) Use multitemporal analysis to derive a thematic map by taking advantages of both amplitude variations and coherence (phase correlation) SAR images collected Multitemporal analysis Yearly thematic map Interannual change detection ( ) ( ) ( ) years y0 y1 y2 Taormina Palazzo dei Congressi 19 Novembre

3 Thematic extraction processing chains: Optical and SAR solutions Acquisition Processing Thematic Extraction Optical data Satellite raw data acquisition Radiometric calibration Geocoding / orthorectification Classification by authomatic tecniques and/or photointerpretation SAR data Multitemporal Satellite raw data acquisitions over a short temporal window (2 images time serie) Radiometric calibration Coregistration and Geocoding Coherence generation Classification by authomatic tecniques and/or photointerpretation Land use thematic map Taormina Palazzo dei Congressi 19 Novembre

4 Advantages in using COSMO SkyMed COSMO constellation advantage Thanks to its 4 satellite constellation, can easily generate time series within a short time window to provide multitemporal analysis (with coherence additional information content) over a given area From 4 to 7 images per day over the same area Available intervals for coherent multitemporal collection (3 satellites): 3 images within 9 days COSMO SkyMed data fully scale compatibility: HIMAGE(StripMap) 1:25,000 SPOTLIGHT 2 < 1:10,000 No Ground Control Points (GCP) are required during the orthocorrection procedure Taormina Palazzo dei Congressi 19 Novembre

5 Taormina Palazzo dei Congressi 19 Novembre

6 Area: Pavia Acquisition dates : 04/05/09 Mode : Spotlight Orbit Pass : Ascending Incidence Angle : Taormina Palazzo dei Congressi 19 Novembre

7 Area: Pavia Acquisition dates : 04/05/09 20/05/09 Mode : Spotlight Orbit Pass : Ascending Incidence Angle : R=04/05/09 G=20/05/09 B=Coherence Taormina Palazzo dei Congressi 19 Novembre

8 Area: Macerata Acquisition dates : 17/11/08 Mode : Spotlight Orbit Pass : Descending Incidence Angle : Taormina Palazzo dei Congressi 19 Novembre

9 R=17/11/08 G=27/12/08 B=Coherence Area: Macerata Acquisition dates : 17/11/08 27/12/08 Mode : Spotlight Orbit Pass : Descending Incidence Angle : Taormina Palazzo dei Congressi 19 Novembre

10 Area: Milano Acquisition dates : 30/11/08 07/03/09 Mode : Himage Orbit Pass : Ascending Incidence Angle : Taormina Palazzo dei Congressi 19 Novembre

11 15th GeoCAP Conference Geomatics in support of the CAP Area: Milano Acquisition dates : 30/11/08 07/03/09 Mode : Himage Orbit Pass : Ascending Incidence Angle : Taormina Palazzo dei Congressi 19 Novembre

12 15th GeoCAP Conference Geomatics in support of the CAP Area: Milano Acquisition dates : 30/11/08 07/03/09 Mode : Himage Orbit Pass : Ascending Incidence Angle : Fields identification Taormina Palazzo dei Congressi 19 Novembre

13 Area: Pavia Acquisition dates : 30/09/08 09/11/08 Mode : Spotlight Orbit Pass : Ascending Incidence Angle : R=30/9/08 G=09/11/08 B=Coherence Taormina Palazzo dei Congressi 19 Novembre

14 Area: Pavia Acquisition dates : 04/05/09 20/05/09 Mode : Spotlight Orbit Pass : Ascending Incidence Angle : R=04/05/09 G=20/05/09 B=Coherence Pavia R= G= B=Coerenza Taormina Palazzo dei Congressi 19 Novembre

15 High value of interferometric coherence and low level of backscattering measured during the two acquisition (streets, bare flat soil) High value of interferometric coherence and high level of backscattering measured during the two acquisition (buildings, infrastructures) Low value of interferometric coherence, high value of backscattering value measured on the first image (Red channel) and low level of backscattering value measured on the second image (Green channel) (Agricultural fields growing during the acquisition of the first image, possible flooding (rice paddies) during the second acquisition ) Low value of interferometric coherence, high value of backscattering value measured on the second image (Green channel) and low level of backscattering value measured on the first image (Red channel) (Agricultural fields growing during the acquisition of the second image, possible flooding (rice paddies) during the second acquisition ) Low level of interferometric coherence and high value of backscattering measured during the acquisition of both images (Agricultural fields with stable high growth, forest) Taormina Palazzo dei Congressi 19 Novembre

16 Key Issues The measured geometric accuracy follows our expectations: Using a digital model with 20m of GSD and planning acquisitions with an incidence within (good trade-off also for lay-over and shadow distortions reduction) an accuracy of 2-3m was measured Encouraging results came from parcels measurement assessment. Good accuracy (especially for flat areas) was measured. Multitemporal analysis enhanced the features recognition but, due to multilook (necessary to compute the interferometric coherence map), the reduction of GSD seems to slightly make the accuracy worse Very good thematic mapping capabilities showed by Coherent Multitemporal products. An initial effort is requested to interpret such images. Taormina Palazzo dei Congressi 19 Novembre

17 Conclusions As a final goal, the ongoing activity is focused on the possibility of introducing this system into the management and control chain of CwRS Starting from the CwRS requirements coming from EU and taking care of the next agreement with ASI (the Italian Space Agency), AGEA is carrying out added values on agro-environment analysis through COSMO-SkyMed VHR SAR data Preliminary work results were already showed to GeoCAP unit of JRC who demonstrated its interest in continuing the experimentation with COSMO data On September 09 JRC and AGEA signed an agreement in order to establish a stable way to exchange know-how also on such issues Taormina Palazzo dei Congressi 19 Novembre

18 Area: Etna Acquisition dates : 14/04/08 08/05/08 Mode : Himage Orbit Pass : Ascending Incidence Angle : Thank you for your attention! Taormina Palazzo dei Congressi 19 Novembre