Sentinel-5 is the polar-orbiting atmospheric monitoring mission, which will provide operational monitoring of trace gas concentrations for atmospheric chemistry and climate applications

It will provide accurate measurements of key atmospheric constituents such as ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, methane, formaldehyde, and aerosol properties.

The primary objectives of the missions are:

  • High temporal and spatial resolution measurements of tropospheric composition, including Planetary Boundary Layer (PBL), for air quality applications.
  • High spatial resolution and high precision monitoring of tropospheric climate gases, methane (CH4), carbon dioxide (CO2) and carbon monoxide (CO) and aerosols with sensitivity to boundary layer concentrations for climate protocol monitoring.

To be carried on the polar-orbiting Metop-SG satellite, the Sentinel-5 mission comprises an Ultraviolet Visible Near-infrared Shortwave (UVNS) spectrometer and data from the Infrared Atmospheric Sounding Interferometer (IASI-NG), the Visible Infrared Imager (METImage) and the Multi-viewing Multi-channel Multi-polarization Imager (3MI).

UVNS Characteristics

Figure 1
Figure 1: Sentinel-5 imaging principle

Hyper-spectral soundings with a spectral resolution from 0.065–1 nm in the wavelength range from 0.27–2.4385 µm, at a spatial sampling of 7 km for channels above 0.3 µm.

The instrument is a pushbroom imaging spectrometer, directly imaging the entrance slit onto the Earth's surface (see Figure 1).

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