Product Explanation

Level 0 Product Summary

Level 1 Product Summary

Level 1 ProductConfigurationAbout
Delay Doppler MapsL1/E1 LHCP
L1/E1 RHCP
L5/E5a LHCP
L5/E5a RHCP		Full Delay Doppler Maps for each frequency and polarisation (GPS and Galileo)
Reflectivity at Specular PointL1/E1 LHCP
L1/E1 RHCP
L5/E5a LHCP
L5/E5a RHCP		Radiometrically corrected Reflectivity at Specular Point
Sigma-0 / NBRCSL1/E1 LHCP
L1/E1 RHCP
L5/E5a LHCP
L5/E5a RHCP		Sigma-0 or Normalised Bistatic Radar Cross Section at Specular Point
Coherent Coefficient:
Power spread ratio (1 Hz)
High rate CC (25 Hz)		L1/E1 LHCP
L1/E1 RHCP
L5/E5a LHCP
L5/E5a RHCP		Coherent coefficient at specular point calculated via power spread in DDM, and by higher rate Coherent Channel
Estimated EIRP at Specular PointL1/E1
L5/E5a		Effective Isotropic Radiated Power from GNSS satellite towards Specular Point
Blackbody NoiseL1 band, L5 bandMeasured Noise power calculated from nadir and direct blackbody loads
Geometry, Antenna Gain, SNR, other meta-dataAll channelsMeta-data including geolocated specular point, antenna gain to specular point, signal to noise ratio at specular point

Level 2 / Level 3 Product Summary

L2 ProcessorOutputsGridL3 Temporal AverageUnits / Uncertainty Mission GoalNominal validation
L2OP-SSM
Soil Moisture		L2G, L325 km1 daym3/m3
0.04 m3/m3		SMAP, SMOS,
San Luis Valley, Chad
L2OP-FT
Freeze Thaw		L2G, L325 km5 days (rolling daily)Binary flag
90% classification accuracy		SMAP, SMOS, Sodankylä
L2OP-SI
Surface Inundation		L2 (1 Hz)
L2 (25 Hz)		Ungridded–Binary flag
90% classification accuracy		JRC GSW
L2OP-FB
Forest Biomass		L2 (1 Hz), L325 km => 1 km6 monthsT/Ha
20% accuracy		GEOCARBON,
Gabon Forest, Sodankylä
L2OP-SWS
Ocean wind & Ice		L2 (1 Hz)Ungridded–m/s (Wind speed) 2 m/s,
Binary (Ice), 90% class. acc.		ASCAT, ERA-5

Data formatted in NetCDF, Levels 1 and 2 divided into 6 hour periods. Product Manual will be made available nearer launch.

HydroGNSS