It was noticed by several users that our new RFI filter was overdoing things a bit (actually one of the flags was wrong) leading to a very reduced amount of available brightness temperatures.
We are working on this issue and already François and Stéphane have patched the bug and tests were carried out at CESBIO before implementation which is underway at CATDS.
The new products will have version number 310
Very soon the operational algorithm will release -less abusely filtered - L3TB data (with more measurements thus) and we will also reprocess the whole data set (both L3TB and RFI).
SMOS Monitors a gigantic early melt in Greenland in quasi real time
As reported here (credit Ruth Mottram, DMI) and here, just a few days ago on April 11 and 12 more than 10% of Greenland surface melted. This is very significant at this time of year (see cutting below from here).
From the late seventies with SMMR, passive microwave sensors have already shown their ability to monitor ice caps.
SMOS, thanks to its L-band capacity is sensitive to layering in the snow/ice pack but liquid water on the surface will also change drastically brightness temperatures and this is exactly what happened.
SMOS sees thus the brightness temperatures over Western Greenland decrease due to heavy surface melting.
The videos below show an animation of SMOS measurements over Greenland.
The the South Eastern part of Greenland, along the coast line, the brightness temperatures suddenly drop from relatively high values (> 240 K. orange colour) to values lower than 220 K. (light blue, green yellow).
Figure : Animation showing SMOS brightness temperatures (L3 TB from CATDS) in H polarization, for an incidence angles ranging between 40 to 45°.
By Arnaud Mialon
We would like to inform you that we have now released the SMOS soil moisture product available in near-real time (NRT) based on a neural network approach.
The netcdf product is disseminated within four hours from sensing. For the moment it is available from ESA’s SMOS data portal (https://smos-ds-02.eo.esa.int/oads/access/). From mid-April this product will also be available through EUMETCAST and GTS.
For further information on the product and access to data please see https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/smos/news/-/article/smos-soil-moisture-product-in-nrt-based-on-neural-network-is-now-available
Category : Data, L1, L2, Ocean
Dear SMOS data user -
We would like to inform you that the reprocessed level 2 soil moisture and sea surface salinity data are now available on the new ESA SMOS Online Dissemination service: https://smos-ds-02.eo.esa.int/oads/access/.
This release aligns the Level 2 soil moisture and sea surface salinity data available operationally already since May 2015 with the reprocessed data archive: SMOS data users now have a complete v6 data set available.
The algorithm evolutions implemented in the v6 data set are described in the respective Algorithm Theoretical Baseline Documents (ATBDs) and in the read-me-first notes: https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/smos/content/-/asset_publisher/t5Py/content/data-types-levels-formats-7631. We would like to encourage all users to familiarise themselves with the read-me-first notes before using the data.
The level 2 reprocessed data products are available on the new ESA SMOS Online Dissemination service accessible here (smos-diss.eo.esa.int). The new service allows to access data by https and ftp/ftps transfer protocols for all registered ESA EO Single Sign-On (EO-SSO) users. The online service facilitates the data access with enhanced functionality for data navigation and selection by data type, acquisition time, geographical area and data format (i.e. ESA Earth Explorer (EEF) or NetCDF format).
SMOS level 1 brightness temperature data and ECMWF auxiliary products are also available from the new ESA SMOS Online Dissemination service.
For further details on how to access the SMOS data and how to register as ESA EO_SSO please https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/smos/content/-/asset_publisher/t5Py/content/how-to-obtain-data-7329.