Algorithm Input and Output Data Definition (IODD)

Contents

Algorithm Input and Output Data Definition (IODD)#

Input Data#

Input L1 Data#

Table 4 Input L1 Data#
Parameter	Description	Shape
L1B TB	L1B Brightness Temperature at L, C and X-bands (H and V polarization)	Full swath or swath section (Nscans, Npos)
L1B NeΔT	Random radiometric uncertainty of the channels	Full swath or swath section (Nscans, Npos)

Auxiliary Data#

Table 5 Auxiliary Data (36 km grid)#
Parameter	Description	Shape*
LST_ECMWF	ECMWF Land Surface Temperature (first priority until CIMR LST is tested)	(964, 406)
soil_texture	Clay fraction (from FAO)	(964, 406)
LCC	Land Cover type Classification	(964, 406)
albedo	Vegetation single scattering albedo	(964, 406)
H	Surface roughness informationn	(964, 406)
DEM	Digital Elevation Model	(964, 406)
hydrology_mask	CIMR Hydrology Target mask ([RD-1], MRD-854)	(964, 406)

Table 6 Auxiliary Data (9 km grid)#
Parameter	Description	Shape*
LST_ECMWF	ECMWF Land Surface Temperature (first priority until CIMR LST is tested)	(3856, 1624)
soil_texture	Clay fraction (from FAO)	(3856, 1624)
LCC	Land Cover type Classification	(3856, 1624)
albedo	Vegetation single scattering albedo	(3856, 1624)
H	Surface roughness information	(3856, 1624)
DEM	Digital Elevation Model	(3856, 1624)
hydrology_mask	CIMR Hydrology Target mask ([RD-1], MRD-854)	(3856, 1624)

* Shapes are equivalent to the global EASE2 grids at 36 km and 9 km resolution, respectively. The final grid resolutions will be decided based on further tests on the tradeoff between noise and spatial resolution.

Input L2 Data#

At the current state, no CIMR L2 outputs are used as an input to the CIMR soil moisture retrieval algorithm. The use of CIMR L2 land surface temperature retrievals (instead of ECMWF land surface temperature data) as auxiliary data source for soil moisture retrievals will be evaluated.

Output Data#

Table 7 L2 Processor Output Data (36 km grid)#
Parameter	Description	Units	Shape*
SM	Soil Moisture	m\(^{3}\)/m\(^{3}\)	(964, 406)
VOD	Vegetation Optical Depth	-	(964, 406)
scene_flags	Flag to indicate difficult inversion situations	8-bit flag	(964, 406)
status_flag	Retrieval status flag	n/a	(964, 406)
TBV_L	Gridded L-band TBV	K	(964, 406)
TBH_L	Gridded L-band TBH	K	(964, 406)
TB_L_RMSE	RMSE between measured and modeled TB	K	(964, 406)

Table 8 L2 Processor Output Data (9 km grid)#
Parameter	Description	Units	Shape*
SM_E	Soil Moisture (enhanced resolution)	m\(^{3}\)/m\(^{3}\)	(3856, 1624)
VOD_E	Vegetation Optical Depth (enhanced resolution)	-	(3856, 1624)
scene_flags	Flag to indicate difficult inversion situations	8-bit flag	(3856, 1624)
status_flag	Retrieval status flag	n/a	(3856, 1624)
TBV_L_E	Gridded L-band TBV (enhanced resolution)	K	(3856, 1624)
TBH_L_E	Gridded L-band TBH (enhanced resolution)	K	(3856, 1624)
TB_L_E_RMSE	RMSE between measured and modeled TB (enhanced resolution)	K	(3856, 1624)

* Shapes are equivalent to the global EASE2 grids at 36 km and 9 km resolution, respectively. The final grid resolutions will be decided based on further tests on the tradeoff between noise and spatial resolution.