1 / 28

SMOS preliminary results SM, SSS, RFI

SMOS preliminary results SM, SSS, RFI. Y.H. Kerr and the SMOS team. Principle of operations. SMOS FOV; 755 km, 3x6, 33°, 0.875 l ,. Each integration time, (2.4 s) a full scene is acquired (dual or full pol) Average resolution 43 km , global coverage

feleti
Télécharger la présentation

SMOS preliminary results SM, SSS, RFI

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SMOS preliminary resultsSM, SSS, RFI Y.H. Kerr and the SMOS team

  2. Principle of operations SMOS FOV; 755 km, 3x6, 33°, 0.875l, • Each integration time, (2.4 s) a full scene is acquired (dual or full pol) • Average resolution 43 km, global coverage • A given point of the surface is thus seen with several angles • Maximum time (equator) between two acquisitions 3 days P. Waldteufel, 2003

  3. SMOS vs Aquarius • Interferometer push broom • Passive only active passive • On its own SAC/D suite of inst. • Spatio temporal resolution • 30-55 km, a/b<1.5 90 x 130km • 3 day 8 day • Sensitivity • 2. 4 K 0.06 K • Angles • Up to 80 (0- 60°) 1 for each beam

  4. Science Objectives for SMOS: The SMOS Mission Mission specifications Soil Moisture multi-angular dual pol 4 % vol 3 day revisit (Vegetation 7 day) better than 50 km • Need for soil moisture and sea surface salinity fields • Only passive L band suitable • Real aperture systems currently not adequate (antenna size) ==>Synthetic antenna Sea Surface Salinity multi acquisitions dual pol or 1st stokes better than 0.1 psu 10 day to monthly Grid scale (200 km) Pellarin et al Le traon et al

  5. First Images in X and Y pol

  6. System level performances • Noise level consistent with expectations • Excellent pointing knowledge ~600 m • Useful for coastlines and water bodies

  7. RADIOMETRY: AntarcticaaroundDome Concordia Dome C only, Hallikainen’s model (one layer, Tsnow= -54°C) G. Macelloni YHK July 2010 F. Cabot

  8. SOUTH-NORTH SSS ANOMALY IN THE PACIFIC: Comparing SMOS and ARGO SMOS: OCEAN SALINITY by J. Boutin & X. Yin, LOCEAN, Paris 0.1 degree bin in latitude, all grids across swath - 1 SMOS half orbit on 11 December 2009 - World Ocean Atlas 2005 SSS climatology - Monthly ISAS analysis of ARGO surface fields in December 2009, Gaillard, LPO, 2010 0.1 degree bin in latitude, all grids across swath

  9. FIRST SMOS SALINITY MAP by J. Tenerelli, CLS, Brest, 10 Feb 2010 SMOS: OCEAN SALINITY Comparing SSS map generated with 3 days of SMOS data (ascending orbits 29-31 Jan 2010) and World Ocean Atlas climatology for January No data averaging Degraded results in field-of-view borders, near coast, and in areas of strong wind

  10. SMOS: OCEAN SALINITY VALIDATION OF SMOS L2 PRODUCTS • March 2010: comparison of SMOS data composite with 7296 in situ salinity values (Argo floats) • ~0.5 psu accuracy @ 25 km resolution by N. Reul, IFREMER, Brest

  11. AMAZON PLUME DETECTED BY SMOS by N. Reul, IFREMER, Brest • SMOS descending orbits, March 2010 • In situ March climatology (1977-2002) @ 1°x1° (G. Reverdin, LOCEAN)

  12. The Amazon plume processed by MTS processed by MTS I. Corbella Higher brightness temperature due to fresh water is seen away of the coast

  13. Global Validation N. Reul Ifremer Brest

  14. Zoom on the Tropical Pacific N. Reul Ifremer Brest

  15. Lagerloef, G., and T. Delcroix, 2001 N. Reul Ifremer Brest

  16. R. Gurney, A. Mialon

  17. SoilmoisturemapOnset of the rainyseason RFI Convective rains Dense forest C. Gruhier Soil Moisture m3/m3

  18. Soil moisture map over West-Africa Soil moisture values during March 2010 SM_OPER_MIR_SMUDP2 2010/03/03 - 2010/03/23 C. Gruhier

  19. Issue of RFI  Europe P. Richaume

  20. Issue of RFI  Europe P. Richaume

  21. Some successes with RFI • Spain is almost clean • Finland is clean • RFI reduced in Germany and Poland • Actions started in China, France, UK, Italy, Romania • Mitigation techniques being established

  22. RFI Impact over Oceans Asc March IN situ Asc April Desc April

  23. SMOS Successfully launched and in operation Many thanks to Science teams Projects (ESA and CNES) The Industry Operations (ESAC and CNES) Provides very good data  earlier and better than expected Soil moisture retrievals are looking very good even though still preliminary and still in Cal Val Salinity maps are produced ! Useful for Aquarius? But still several hurdles and issues to be solved RFI, An issue but not for SMOS / Aquarius only!! Data to be released - so that “blemishes “ are corrected – Level 1 to all and L2 to Cal Val users  NOW Level 2 to all  September 2010 See also Our Blog  http://www.cesbio.ups-tlse.fr/SMOS_blog/ Summary

  24. Thank You! Soil moisture retrievals January - July 2010 Thank you for your patience http://www.cesbio.ups-tlse.fr/SMOS_blog/

  25. Thank You! Soil moisture retrievals June 20 -23 2010 P. Richaume

  26. Vegetation opacity map June 20-23 2010 P. Richaume

More Related