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Abstract:

The ALTIUS-instrument is a three-channel spectral imager, measuring in the ultraviolet (UV) (250 nm to 450 nm), visible (440 nm to 800 nm) and near infrared (NIR) (900 nm to 1800 nm) wavelength domains, that is bound to fly aboard a PROBA-satellite. The ALTIUS-project (satellite and instrument) is developed under the supervision of ESA and with funding of Belgian Science Policy (BELSPO). The goal of the ALTIUS-instrument is to make hyper spectral images of the limb of the earth. To do this, the instrument will use different observation techniques such as “direct limb viewing”, ”stellar occultation” as well as “solar occultation”.