PART 2: A QUICK COMPARISON OF V504 AND V620 GLOBAL MAPS Joe Tenerelli SMOS Calibration Meeting 18 26/05/2014.

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Presentation transcript:

PART 2: A QUICK COMPARISON OF V504 AND V620 GLOBAL MAPS Joe Tenerelli SMOS Calibration Meeting 18 26/05/2014

Use only alias-free brightness temperatures, excluding border pixels within dir cosine units of border Brightness temperatures and retrieved SSS are projected onto earth dwell lines and averaged as usual. A single May 2011 OTT is applied to both May 2011 and November Additionally, for each map of (Tx+Ty)/2 bias for the two versions v504 and v620, the median bias is subtracted from the map. For the SSS bias maps and for the v620-v504 difference maps, no median offset is removed.

May 2011

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 May 2011; Ascending passes; V504

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 May 2011; Ascending passes; V620

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 May 2011; Descending passes; V504

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 May 2011; Descending passes; V620

RETRIEVED SALINITY May 2011; Ascending passes; V504

RETRIEVED SALINITY May 2011; Ascending passes; V620

RETRIEVED SALINITY May 2011; Descending-Ascending passes; V504

RETRIEVED SALINITY May 2011; Descending-Ascending passes; V620

November 2012

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Ascending passes; V504

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Ascending passes; V620

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Descending passes; V504

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Descending passes; V620

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Descending-Ascending passes; V504

FIRST STOKES PARAMETER DIVIDED BY TWO (Tx+Ty)2 Nov 2012; Descending-Ascending passes; V620

RETRIEVED SALINITY Nov 2012; Ascending passes; V504

RETRIEVED SALINITY Nov 2012; Ascending passes; V620

RETRIEVED SALINITY Nov 2012; Descending-Ascending passes; V504

RETRIEVED SALINITY Nov 2012; Descending-Ascending passes; V620

V620-V504 DIFFERENCES

RETRIEVED SALINITY May 2011; Ascending passes; V620-V504

BIAS IN (Tx+Ty)/2 May 2011; Ascending passes; V620-V504

RETRIEVED SALINITY Nov 2012; Descending passes; V620-V504

BIAS IN (Tx+Ty)/2 Nov 2012; Descending passes; V620-V504

THIRD STOKES PARAMETER IN INSTRUMENT BASIS

BIAS IN THIRD STOKES Nov 2012; Descending passes; V504

BIAS IN THIRD STOKES Nov 2012; Descending passes; V620

BIAS IN FOURTH STOKES Nov 2012; Descending passes; V504

BIAS IN FOURTH STOKES Nov 2012; Descending passes; V620

BOTTOM LINE: Land contamination still present in V620. Shadowing seems reduced for third Stokes in V620, but not for fourth Stokes. But the Fourth Stokes does look better over the open ocean in V620 than in V504.