Algorithm Input and Output Data Definition (IODD)

Input data

Table 2 Input Data

Quantity	Description	Sources
L1b TB at L-band	L1B Brightness Temperatures at 1.4 GHz (V, H, 3\(^{rd}\) Stokes)	CIMR L1 ground segment
Level-2b SST product	Sea Surface Temperature (optional)	CIMR L2 ground segment
Level-2b SWS product	Sea Surface Wind speed and direction (optional)	CIMR L2 ground segment
Level-2b SIC product	Sea Ice concentration (optional)	CIMR L2 ground segment

Output data

Table 3 Output Data

name	description	Units	dimensions
time	seconds of observation since YYYY-MM-DD 00:00:00 UTC.	seconds	\([look,xdim_{grid},ydim_{grid}]\)
lon	longitude. range: \([0^{\circ}, 360^{\circ}]\)	degrees East	\([look,xdim_{grid},ydim_{grid}]\)
lat	latitude. range: \([90^{\circ}S, 90^{\circ}N]\)	degrees North	\([look,xdim_{grid},ydim_{grid}]\)
sea_surface_salinity	sea surface salinity	pss	\([look,xdim_{grid},ydim_{grid}]\)
sea_surface_salinity uncertainty	sea surface salinity uncertainty	pss	\([look,xdim_{grid},ydim_{grid}]\)
sea_surface_sainiy quality level	Flag indicating the quality level of the SSS retrieval	n/a	\([look,xdim_{grid},ydim_{grid}]\)
sea_surface_temperature	sea surface tempearture	Kelvin	\([look,xdim_{grid},ydim_{grid}]\)
wind_speed	sea surface wind speed	m/s	\([look,xdim_{grid},ydim_{grid}]\)
wind_direction	sea surface wind direction	meteorological convention. \(0^{\circ}\): wind coming out of N, +90\(^{\circ}\) : wind coming out of E, etc. range: \([0^{\circ},+360^{\circ}]\).	\([look,xdim_{grid},ydim_{grid}]\)

Auxiliary data

Auxiliary Data Required for Forward Model

Table 4 Auxilliary Data

Quantity	Required For	Sources
sea surface salinity	spec. emission	WOA, CMEMS, ISAS
sea surface temperature	spec. emission	CIMR, ECMWF
surface pressure	atmos. model	ECMWF,
2-m temperature	atmos. model	ECMWF,
columnar vapor	atmos. model	ECMWF,
10-m NE wind speed	glint, rough sfc. emission	CIMR,ECMWF, Metop-SG
10-m wind direction	rough sfc. emission	CIMR,ECMWF, Metop-SG
mispointing angles	geometry initialization	CIMR L1 ground segment
best fit plane angles	geometry initialization	CIMR L1 ground segment
time correlations	EO-CFI initialization	CIMR L1 ground segment
solar flux	TEC alt. correction, sun glint	RSGA files
ORBSCT file	EO-CFI	RSGA files
wind GMF	wind speed inversion	internal file
OTT bias correction	Stokes vector bias correction	CIMR SSS processor
LSC correction	land sea contamination correction	internal file
distance to nearsest coasts	LSC flagging	CIMR L1 ground segment

Ancillary data

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