As you may be aware a root zone soil moisture science product was available (made by Ahmad Al bitar and Ali Mahmoodi). Recently Nitu Ojha recoded the redesigned with a few updates to run with the new L3 products and with the help of Stéphane Tarot and Arnaud Mialon the product is now running operationally on CATDS RZSM . The new RZSM is still an estimate of soil moisture within the first meter of soil but is now updated daily and is available at CATDS for the period reprocessed (2010 to 24/5/2011) and running operationally (May 2021 to now).
The following images prepare by N Ojha, show the RZSM (rot zone soil moisture) obtained from SMOS for the month of July 2022. Clearly the very special 2022 we had is visible.