Low frequency are on top and higher frequencies are on the bottom of the plot. By tuning into the radio signals some recordings have already been made prior to the anticipated peaks in activity later in the week. Note the spectrograms represent the time variation of the audio output of the receiver. The vertical scale shows frequency. Hz around the 1kHz central frequency.
Higher frequencies are at the bottom of the figure, lower frequencies at the top.
I had put up the 25 cm with a video camera between the stores building and the transport office barrack to capture eventual impacts on the dark part of the moon. The moon is now fairly close to the radiant and therefore most impacts will occur on the far side. Only a very small part at the northern cusp was exposed to the stream. The weather was quite good, considering all the rain in the evening. That was unfortunate since the moon passed the 1932 stream only four earth radii from its maximum just at that time.