First data from TUS

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The removal of the TUS photodetector in the focal plane and series of first measurements were carried out on May 19, 2016. UV radiation of night Earth’s atmosphere was measured with a temporal resolution of 0.8 us in the entire FoV (area is 6400 km2, spatial resolution 5 km). The example of UV monitoring along the satellite trajectory is shown in the Fig.1. Fig.2 demonstrates the waveforms of one PMT module.

Fig. 1. Examples of measurement of the intensity of the night part of the orbit (the increase at the end of waveform is a glow of the auroral oval.

Fig. 2. An example of the measured waveforms of a photodetector module.