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Page 1 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Ocean geophysical results from ASAR  Geophysical overview  ocean spectra : the isidore case.

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Presentation on theme: "Page 1 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Ocean geophysical results from ASAR  Geophysical overview  ocean spectra : the isidore case."— Presentation transcript:

1 Page 1 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Ocean geophysical results from ASAR  Geophysical overview  ocean spectra : the isidore case  inversion on single look complex images  prospective studies : doppler anomaly  conclusions

2 Page 2 ASAR Validatoin Review - ESRIN – 9-13 December 2002 annual swell index annual significant wave height

3 Page 3 ASAR Validatoin Review - ESRIN – 9-13 December 2002 swell index for autumn season

4 Page 4 ASAR Validatoin Review - ESRIN – 9-13 December 2002

5 Page 5 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Imagette visualisation

6 Page 6 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Imagette spectrum visualisation

7 Page 7 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Sar inversion (esa algorithm)

8 Page 8 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Collocated WAM spectrum

9 Page 9 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Hurricane isidore from NOAA Sept 23 ASAR/MERIS Sept 21

10 Page 10 ASAR Validatoin Review - ESRIN – 9-13 December 2002 ASAR Wave Mode, Level 2 algorithm

11 Page 11 ASAR Validatoin Review - ESRIN – 9-13 December 2002 ASAR intensity image during Valparaiso experiment (cetp) oct 26

12 Page 12 ASAR Validatoin Review - ESRIN – 9-13 December 2002

13 Page 13 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Sigma 0 ECMWF (dB) calibration constant : dB based on september data Imagette mean intensity (dB)

14 Page 14 ASAR Validatoin Review - ESRIN – 9-13 December 2002 doppler centroid anomaly Two different tracks

15 Page 15 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler centroid anomaly on Wave mode level1b (descending tracks)

16 Page 16 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler centroid anomaly (ascending tracks)

17 Page 17 ASAR Validatoin Review - ESRIN – 9-13 December 2002 ASAR intensity image during Valparaiso experiment (cetp) oct 26

18 Page 18 ASAR Validatoin Review - ESRIN – 9-13 December 2002 (triggered by a doppler-map case study from Andrea Monti-Guarnieri in 2000) Doppler anomaly map some block processing issues !

19 Page 19 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler centoid (Hz) Land Ocean

20 Page 20 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Comparison with a similar ERS 2 SLC image doppler centroid analysis

21 Page 21 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler estimated on range compressed data saturation on rapidly changing backscatter area !

22 Page 22 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler estimated on range and azimuth compressed data Wind

23 Page 23 ASAR Validatoin Review - ESRIN – 9-13 December 2002 Doppler anomaly chart

24 Page 24 ASAR Validatoin Review - ESRIN – 9-13 December 2002

25 Page 25 ASAR Validatoin Review - ESRIN – 9-13 December 2002 CONCLUSION overall very excellent quality of asar data need for another 3 month validation with buoys and model for level 2 doppler anomaly estimation require precise orbit and attitude monitoring


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