The Sentinel-4 instrument is a high-resolution spectrometer in the GMES 'Geostationary Atmosperic Mission' project and part of the Copernicus programme. For the first time, it will provide data from geostationary orbit to monitor atmospheric composition with a focus on air quality and climate. Sentinel 4 will fly on the MTG (Meteosat Third Generation) sounder.
Working during the test campaign at the Institute of Optical Sensor Systems
An essential subsystem are the two focal planes (FPAs) with the corresponding spectrometers, which cover the wavelength ranges 305 Nanometer (nm) - 500nm (ultraviolet and visible spectrum) and 750nm - 775nm (near infrared). Since the systems are operated at approximately 215Kelvin (K), the measurements must be carried out in a thermal vacuum chamber. Both focal planes were tested at the DLR Institute of Optical Sensor Systems on behalf of Airbus Defense and Space GmbH.
System- Specifications
The Sentinel-4 UVN instrument covers the following spectral ranges:
ultraviolet (305-400 nm),
Visible (400-500 nm)
Near-infrared (750-775 nm)
The spatial resolution 8 km
spectral resolution is 0.12 nm and 0.5 nm (depending on the wavelength).
