The payload consists of a telescope which takes images of the airglow emissions. The telescope has a length of 50 mm. At one end, a CMOS detector captures images with a resolution of 188 x 120 pixels and a pixel size of 24 μm via a focusing optics, which provides a FOV of 25° and a resolution of 0.16°/pixel. A bandpass filter centered at 767 nm, with a bandwidth of 20 nm, selects the desired wavelength of the airglow. At the other end, a baffle protects the optical system and the detector from straylight. The payload is commanded by the ground to take images and sends back down about one image per week.
In a first phase airglow emissions shall be observed at different regions and under different angles of observation. These measurements will provide a first idea of expected minimum, maximum and mean intensities of airglow emissions during both day and night. Furthermore, it will allow analyzing background radiation due to scattered sun- or moonlight. The first observation phase shall last 3 months. During this period, 20 images of the airglow shall be taken. In a second phase only observations of airglow emissions at limb between 50 and 120 km shall be carried out. Since they constitute the basis for a new low-cost earth sensor, their variation in intensity has to be studied more carefully. Hence, the variation of emission intensity depending on latitude can be observed over a longer period. The duration of this second phase will be determined by the lifetime of the satellite.