To assess the flood dynamics, we used SMOS images with
processing level of L1c [4], allowing the evaluation of spatial
distribution of brightness temperature TB. The uncertainty of
TB ranged from ±3 K at the center and up to ±6 K at
the edges of a swath width of ∼890 km wide. The satellite
observations were made approximately at 7 A.M. local time by
means of MIRAS in horizontal and vertical polarization mode
at probing angles of 0◦−55◦ and at a frequency of 1.41 GHz.
The radiometer’s resolution varies from 35–50 km and is 45
km at the probing angle of 42.5◦.
SMOS data (L1c) are represented on a discrete geodesic grid
DGG ISEA 4H9 [11]. The linear size of a cell is ∼16 km, and
the area is ∼196 km2. According to the Nyquist criterion, such
a scale/grid ratio resolution provides a precise representation of
the measurement results [9].