![Page 1: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/1.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
Roughness model deltas
v550 OTTs made fromREPR v504 L1c
30 January 2012
ARGANS
![Page 2: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/2.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.56 K OTT1-OTT3 +0.33 K
![Page 3: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/3.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.57 K OTT1-OTT3 +0.30 K
![Page 4: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/4.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.22 K OTT1-OTT3 +0.18 K
![Page 5: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/5.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.22 K OTT1-OTT3 +0.19 K
![Page 6: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/6.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.45 K OTT1-OTT3 +0.23 K
![Page 7: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/7.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
v550 OTTs made from REPR v504 L1c
OTT1-OTT2: -0.45 K OTT1-OTT3 +0.22 K
![Page 8: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/8.jpg)
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
![Page 9: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/9.jpg)
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
![Page 10: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/10.jpg)
www.argans.co.uk
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’?
![Page 11: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/11.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT1 – OTT2, descending 20111109 (event 54)
Why strong delta at top edge of VV?
![Page 12: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/12.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT1 – OTT2, ascending 20111109 (event 54)
Why strong delta at top edge of VV?
![Page 13: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/13.jpg)
www.argans.co.uk
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?
![Page 14: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/14.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT3 – OTT2, ascending 20100704 (event 21)
Delta at top edge in VV seems to come from model 2?
![Page 15: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/15.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT1 – OTT3, ascending 20100704 (event 21)
Strong gradient in HH?
![Page 16: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/16.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT2 – OTT3, ascending 20100704 (event 21)
Strong gradient in HH seems to come from model 3?
![Page 17: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/17.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT1 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3?
![Page 18: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/18.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT1 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3, hhv & vvh?
![Page 19: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/19.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
delta OTT3 – OTT2, cross-pol, ascending 20100704 (event 21)
Strange pattern in Stokes 3, from model 2?
![Page 20: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/20.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
Reprocessed v550 L2OS
20110704T014904, filtered by poor(retrieval or geophysical)Problem in SSS1 at edges in EAFFOV: wind/TEC/???
![Page 21: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/21.jpg)
www.argans.co.uk
SMOS L2 Ocean Salinity
Reprocessed v550 L2OS
20110704T141932, filtered by poor(retrieval or geophysical)Problem in SSS1 at edges in EAFFOV: wind?
![Page 22: Roughness model deltas v550 OTTs made from REPR v504 L1c](https://reader034.vdocument.in/reader034/viewer/2022051416/56814589550346895db2715b/html5/thumbnails/22.jpg)
www.argans.co.uk
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?