5 years ago today .... ... The first SMOS Image was acquired ... and processed giving some (strange) soil moisture estimates but proving that the whole concept worked, including image reconstruction! A lot a progresses have been made since so a big thanks to all of you who contributed to this huge success! Yann for the whole SMOS gang from all over the globe (including the retired and...

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LEWIS on the move: Part 2 As posted last June our good old faithful LEWIS (Lemaitre et al, 2004) after spending 9 years in SMOSREX near Toulouse underwent maintenance and updating and was moved to Saint Hilaire du Touvet  near Grenoble by François Lemaître and Arnaud Mialon. The road trip was arduous as LEWIS is not small to say the least while it is "a long and winding road" to the top... Once...

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Happy Birthday SMOS! Yes SMOS has been orbiting the Earth for over 5 years now! And SMOS has been granted an extension which should take us for another 5 years. To Celebrate just look at this animation prepared by Ahmad Albitar based on the SMOS median soil moisture retrievals. Just  click, look and you will see many features.... The red bars in the bottom indicate the months of the...

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SMOS is on twitter! simply go to --> https://twitter.com/SMOS_satellite! Nemesio & Beatriz

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Potential of SMOS at measuring SSS with a precision... By J., Boutin, N. Martin, N. Kolodziejczyk and G. Reverdin from LOCEAN/IPSL, Paris It has been shown by Durand et al. (2013), Reul et al. (2013), Hasson et al. (2014) that SMOS detects large scale interrannual variability of SSS. The LOCEAN group check this again over 2010-2014. The monthly anomalies of SMOS SSS with respect to a SMOS SSS monthly climatology very well...

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5 years ago today ….

Category : Non classé

… The first SMOS Image was acquired … and processed giving some (strange) soil moisture estimates but proving that the whole concept worked, including image reconstruction!

First_SM

A lot a progresses have been made since so a big thanks to all of you who contributed to this huge success!

Yann for the whole SMOS gang from all over the globe (including the retired and pensioners)

LEWIS on the move: Part 2

Category : Cal/Val, Data, ground measurements

As posted last June our good old faithful LEWIS (Lemaitre et al, 2004) after spending 9 years in SMOSREX near Toulouse underwent maintenance and updating and was moved to Saint Hilaire du Touvet  near Grenoble by François Lemaître and Arnaud Mialon.

The road trip was arduous as LEWIS is not small to say the least while it is « a long and winding road » to the top…

DSCN2069IMG_20140516_081042

DSCN2081

DSCN2087

Once on site (in spite of the snow melt mud) the whole set up with LEWIS and its supporting frame was hoisted and put in place…

And then the connecting testing etc was performed by François while LEWIS was overhanging the valley below….gauging the situation. Enventually Arnaud and François got everything ship shape and the fine tuning started.

The instrument can scan the valley below (Azimuth and elevation and will make continuous measurements on selected spots. Calibration is done as was done during SMOS REX with a few automatic sky measurements performed using a reflective plate (and manual one aiming directly at the sky). In Valley ground measurements are performed on the selected sites and our COSMOS probe will move from Toulouse next spring.

IMG_20140516_120253IMG_0386

We are collaborating with Thierry Pellarin from LTHE Grenoble for this campaign.

First results are encouraging. There are some small RFI but François is devising a scheme to make sure we identify them. The connection between the instruments has also hiccups but here as well Arnaud and François identified the cause and it should be corrected soon.

Our contraption is located close to some para-gliders and we must say they were a bit mystified at the beginning… but the pictures they take from up there are quite nice (this picture was taken by Christian).

Below some first measurements made by LEWIS in St Hilaire du Touvet on the left hand side the temporal plots acquired over a forest and lake mix footprint (some RFI visible). In green the Infra red temperatures and in Red and blue respectively the V and H pol. On the right hand side the view seen by the radiometer when doing these measurements.

lewis_TB_champs_foret_lac_zoom08 nov 14   12h sur Centre2

To finish this story Arnaud made a scan of the whole area and you will see the brightness temperatures (V pol) of the valley as seen from LEWIS  either from above (RHS) or with the perspective (LHS) not the industrial area (coldish due to metallic roofs) the warmish urbanised areas.

lewisTBV_scan_vue3DTBV_scan_vue_dessus

And now the next step is to do some science with this set up… so keep posted!

The funding was partly from SMOS CESBIO but also from CNES TOSCA programme. The Mairie was of very big help and made all what was possible to enable this experiment. The local companies were of great help too and did a mint job … A very big thank to all of them.

Reference

Lemaître, F., J.-C. Poussière, Y. H. Kerr , M. Dejus, R. Durbe, P. de Rosnay and J.-C. Calvet (2004). « Design and test of the ground based l band radiometer for estimating water in soils (lewis). » IEEE Geoscience and Remote Sensing 42(8): 1666-1676.

Happy Birthday SMOS!

Category : CATDS, Data, L3

Yes SMOS has been orbiting the Earth for over 5 years now!

And SMOS has been granted an extension which should take us for another 5 years.

To Celebrate just look at this animation prepared by Ahmad Albitar based on the SMOS median soil moisture retrievals. Just  click, look and you will see many features…. The red bars in the bottom indicate the months of the pictures . It is a 3 months running window.

SMOS_median_sm

Or, in term of brightness temperatures, (still done by Ahmad)  but in percentiles with also many features to be seen!

TB

SMOS is on twitter!

Category : Non classé

simply go to –> https://twitter.com/SMOS_satellite!

Nemesio & Beatriz