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 transcript:

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

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

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

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

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

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

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

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

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

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

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

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

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)

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

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

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

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

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 !

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

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

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

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

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

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

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