Not too much happened since our last post. The most important news is that our two-weeks span without experiment interaction went as expected. Our ground support BioTESC was busy with live operations for the German Horizons experiment CIMON, which went pretty well. BioTESC asked in advance if it is possible to prepare MarconISSta such that no interaction is needed in week 46. So we decided to finally do a more detailed analysis of the S band amateur allocations and are currently swiping through 2400 MHz to 2450 MHz. The S band assessment will go on until the end of this week. So far we can say that the S band seems to be less used than the L band. The most interesting signal can be seen in the picture below. A signal that varies over time between 2403 MHz and 2405 MHz. This signal clearly originates from the ISS, but we do not know what it is, most probable a frequency shift of a TCXO (oscillator). We will analyze the discontinuities and oscillations of the signal and how these match the ISS orbits and eclipse times. We also asked regulatory authorities and ARISS if they have any idea what the signal is, with a final answer still pending.