www.argans.co SMOS L2 Ocean Salinity Roughness model deltas v550 OTTs made from REPR v504 L1c 30 January 2012 ARGANS
Jan 12, 2016
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SMOS L2 Ocean Salinity
Roughness model deltas
v550 OTTs made fromREPR v504 L1c
30 January 2012
ARGANS
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.56 K OTT1-OTT3 +0.33 K
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.57 K OTT1-OTT3 +0.30 K
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.22 K OTT1-OTT3 +0.18 K
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.22 K OTT1-OTT3 +0.19 K
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.45 K OTT1-OTT3 +0.23 K
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SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.45 K OTT1-OTT3 +0.22 K
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.44 K OTT1-OTT3 +0.23 K
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.43 K OTT1-OTT3 +0.20 K
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SMOS L2 Ocean Salinity
Conclusions:
• Very small differences between ascending & descending OTT1/2/3 deltas
• Models are biased, especially in HH & in AFFOV:
OTT1-OTT2: -0.56 K OTT1-OTT3 +0.33 K OTT2-OTT3 +0.89 K
• Maybe deltas in Stokes 3 & 4 too – not tested
• Biases are corrected by OTTs
• Which model is nearer to ‘ground-truth’?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT2, descending 20111109 (event 54)
Why strong delta at top edge of VV?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT2, ascending 20111109 (event 54)
Why strong delta at top edge of VV?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT2, ascending 20100704 (event 21)
Why strong delta at top edge of VV, independent of sun, ascending/descending, year, etc?
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SMOS L2 Ocean Salinity
delta OTT3 – OTT2, ascending 20100704 (event 21)
Delta at top edge in VV seems to come from model 2?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT3, ascending 20100704 (event 21)
Strong gradient in HH?
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SMOS L2 Ocean Salinity
delta OTT2 – OTT3, ascending 20100704 (event 21)
Strong gradient in HH seems to come from model 3?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3?
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SMOS L2 Ocean Salinity
delta OTT1 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3, hhv & vvh?
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SMOS L2 Ocean Salinity
delta OTT3 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3, from model 2?
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SMOS L2 Ocean Salinity
Reprocessed v550 L2OS
20110704T014904, filtered by poor(retrieval or geophysical)Problem in SSS1 at edges in EAFFOV: wind/TEC/???
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SMOS L2 Ocean Salinity
Reprocessed v550 L2OS
20110704T141932, filtered by poor(retrieval or geophysical)Problem in SSS1 at edges in EAFFOV: wind?
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SMOS L2 Ocean Salinity
Conclusions:
• Does delta OTT1/2/3 indicate any algorithm issues?
• Does delta SSS1/2/3 in EAFFOV indicate problem with WS in SSS1?
• Why only in EAFFOV?
• Also at leading/trailing edges of snapshot inside swath, but hidden?
• How can we work towards unification of SSS1/2/3?