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UPDATE ON SMOS LONG-TERM BIASES OVER THE OCEAN AND ROUGH SURFACE SCATTERING OF CELESTIAL SKY NOISE. Joe Tenerelli SMOS L2OS Progress Meeting Arles, France, September 26, 2011. SMOS PASSES USED IN THIS ANALYSIS. DRIFT IN 2010 ONLY. NO LOSS MODEL. ONE-SLOPE LOSS MODEL.
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UPDATE ON SMOS LONG-TERM BIASES OVER THE OCEAN AND ROUGH SURFACE SCATTERING OF CELESTIAL SKY NOISE Joe Tenerelli SMOS L2OS Progress Meeting Arles, France, September 26, 2011
ONE-SLOPE LOSS MODEL Notice the significantdesc-ascbiasnowappearingwithboth one and twoslopelossmodelsbetweenNov 2010 and April 2011. It is of opposite sign to thatbetween Sep and Dec 2010 observedwith no loss model. It appearsthat the loss correction istoostrong in thisperiod.
TWO-SLOPE LOSS MODEL The two-slope model seems to degradedesc-ascbias relative to the one-slope model.
ONE-SLOPE LOSS MODEL: IMPACT OF GALACTIC REFLECTION MODEL It turns out that, for the metricsusedhere, the impact of the formulation of galactic noise scatteringat the surface on desc-ascbiasisquitesmalleven for descending passes in September. Kirchhoff scatteringmodel for galactic noise
ONE-SLOPE LOSS MODEL: IMPACT OF GALACTIC REFLECTION MODEL It turns out that, for the metricsusedhere, the impact of the formulation of galactic noise scatteringat the surface on desc-ascbiasisquitesmalleven for descending passes in September. Flat surface reflection model for galactic noise
LONG TERM DRIFT JUNE 2010 – JUNE 2011 Considering the June 2010 to June 2011 period, thereisverylittle net drift in the AF and EAF FoVs In the ascending passes.
SHORT TERM DRIFT IN 2010 AND 2011 The two-slope model seems to degradedesc-ascbias relative to the one-slope model. Two-slopedegradesdesc-ascconsistency
The following are biascurves for operational DPGS Level 1B data:
The following are biascurves for operational DPGS Level 1A data and using JRECON with no direct sun correction:
CROSS SECTIONS THROUGH THE CELESTIAL SKY MAPS NEW SEMI-EMPIRICAL MODEL
CROSS SECTIONS THROUGH THE CELESTIAL SKY MAPS ORIGINAL KIRCHHOFF MODEL
CROSS SECTIONS THROUGH THE CELESTIAL SKY MAPS NEW SEMI-EMPIRICAL MODEL: Ascending Passes
CROSS SECTIONS THROUGH THE CELESTIAL SKY MAPS NEW SEMI-EMPIRICAL MODEL: Descending passes