SMOS RSE special issue deadline postponed

Category : Cal/Val, Data, L1, L2, L3, L4, Model, Ocean, ground measurements

Dear colleague,

With regards to your potential contribution to the Special Issue on SMOS in Remote Sensing of Environment, we would like to notify you that the deadline for full paper submissions has been extended until 31st July 2015. Please be aware that this deadline change is final and no exceptions will be allowed after this date.

In case you have already submitted your paper, please disregard this message.

To submit your paper, please go to http://ees.elsevier.com/rse/ and select the option ‘submit paper’ from the menu bar near the upper left corner of the page. During the submission process, please make sure to select ‘SMOS 5 Years’ in the dropdown menu when choosing the article type, as demonstrated in the attached image.

Accepted papers will be published online as soon as possible following a final editing procedure by the Publisher. Once again, we encourage you to critically check your list of authors against the RSE guidelines on authorship (http://www.elsevier.com/journal-authors/ethics) to ensure appropriate representation of effort.

We look forward to receiving your contributions.

Yours sincerely,
Susanne Mecklenburg
On behalf of the editors for the Special Issue on SMOS in RSE

My (big) mistake wrt LEWIS

Category : Cal/Val, Data, ground measurements

I would like to complement a statement I made on several posts which is inaccurate!

I said on several occasions that LEWIS had been designed by F Lemaitre from ONERA when he actually designed the receiver etc but not the horn which was designed by CNES (M Dejus). I may even add that the design of the horn inspired the design of EMIRAD horn probably and, moreover, was used directly for CAROLS and MARMOTTE2.

This being corrected, I am glad to add hat LEWIS, in the Alps, is still running strong!

SMOS and Lewis to help in SMAP calibration?

Category : Data, ground measurements

Recently (12/2/2015) at 8:43 PST the SMAP radiometer was switched on while viewing deep space and before antenna deployment. The health check was fully satisfactory according to NASA GSFC which is very good news indeed. They are currently busy analysing the results but values look good.

This check can also be used to check the instrument calibration and it was thus decided to do two things on top of what is planned by the SMAP team.

The first one coordinated by François Cabot consisted in doing in a coordinated fashion a SMOS cold sky calibration.

Sky_Feb11track of SMAP when imaging deep sky and point viewed by SMOS during its calibration sequence

The second one was done by Arnaud Mialon with help of François Cabot and François Lemaître and consisted in looking at the same solid angle as SMAP horn with Lewis using SMAP ephemeris. It was done yesterday with apparently success as well.

SMAP_LEWISSMAP ephemeris’s  with those of SMOS and Lewis « box »( F Cabot)

DSCN2153Lewis following SMAP (A. Mialon)

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.

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