The GHGSat-C1 and GHGSat-C2 satellites capture with very high spatial and spectral resolution the greenhouse gas emissions and measures the vertical column densities of atmospheric gases through its hyperspectral imaging spectrometer operating in a narrow band of the short-wave infrared (SWIR) region of the electromagnetic spectrum. Both archive and new tasking data can be requested, based on a single observation of the scene, as well as the full year product which is the average annual emission rate based on as many observations as can be successfully collected.
The following products are made available:
- Abundance dataset (Level 2): Set of per-pixel abundances (ppb or mol/m2) for a single species, and per-pixel measurement error expressed as a standard deviation for a single site on a single satellite pass. Data format is GeoTIFF (16-bit) or optionally GeoTIFF (32-bit or 64-bit floating point)
- Concentration Maps (Level 2): High readability pseudocolour map combining surface reflectance, and column density expressed in ppb or mol/m2 for a single species in PNG (optional PDF) format. The relevant abundance dataset is provided as well.
- Emission Rates (Level 4): Instantaneous emission rate from targeted source estimated using abundance datasets from a single satellite pass and applying dispersion modelling techniques in PDF format. The delivered product includes the emission rate estimate with uncertainty and key dispersion parameters (in CSV format) as well as the abundance dataset used for the emission estimate.
The properties of available products are summarised in the table
|Band(s) / Beam Mode(s) and Polarisation||SWIR (1635-1675 nm), multiple bands, unpolarised|
|Spatial Resolution||<30 m|
|Scene size||12 km x 12 km|
|Geometric Corrections||Radial distortion, perspective projection|
|Radiometric Corrections||Detector pixel response, ghosting, spectral response, atmospheric correction including trace gas modelling and surface reflectance|
Details about the data provision, data access conditions and quota assignment procedure are described in the GHGSat Terms of Applicability.