Figure 1
SMOS unprocessed brightness temperatures at X polarization from a morning overpass half-orbit L1C data file for 2 July, 2015. The color scale has been limited to 330 K, but the data contains values as high as 900 K indicating pixels with RFI.
Figure 2
Brightness Temperature extracted for the Neckar catchment after precessing for three incidence angles 35° (left), 40° (middle) and 45° (right).
Table 1
Benchmarks for processing time with Matlab and Octave for two case studies: Half-orbit and a region (Neckar catchment). Linux 64bit PC with 4 GB RAM and CPU 2534 MHz Inter Centrino 2 core. The “m-script” column represents only loading the raw data, without any processing.
| Case Study | No. DGGs | Matlab m-script | Matlab MEX | Octave MEX |
|---|---|---|---|---|
| Half-orbit | 114369 | 2957.16 | 84.01 | 82.73 |
| Sub-sector | 265 | – | 6.12 | 6.02 |
| Storage as output MAT-file | +3% | +25% | +33% | |
Figure 3
Statistics for SMOS vs SMAP brightness temperatures at H-polarization (top panel) and V-polarization (bottom panel) for April to December 2015. SMOS is the result of the “Process_SMOSxL1C” processing software. The dots represent the median TBs within the selected region and the bars are the 1st and 3rd quartiles.
Figure 4
Time series of SMAP brightness temperature measurements and SMOS L1C product processed with “Process_SMOSxL1C” mex-function (top). The bottom panel shows the residuals of the median within the distribution.
Figure 5
Simulation of brightness temperatures at 1.4 GHz and three incidence angles: 20° (top), 30° (center) and 40° (bottom). The black-line is the median of the TB distribution within the Neckar catchment, the gray area is the inter-quantile region and the lighter gray area indicate the 5% to 95% quantiles. The Box-plots depict the statistics of the distributions of the real measurements by SMOS and processed by “Process_SMOSxL1C” mex-function.