An overview of the radio observations during November 2019 is given.
The graphs show both the daily totals (Figure 1) and the hourly numbers (Figure 2) of “all” reflections counted automatically, and of manually counted “overdense” reflections, overdense reflections longer than 10 seconds and longer than 1 minute, as observed here at Kampenhout (BE) on the frequency of our VVS-beacon (49.99 MHz) during the month of November 2019.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
N(h) = n(h-1)/4 + n(h)/2 + n(h+1)/4
During this month there were few local disturbances (apart from sometimes quite strong background noise), no registered “sporadic E” (Es) nor was there lightning activity.
As expected, highlights of the month were the Leonids. The number of reflections of this swarm remained relatively low, but several overdense echoes longer than 10 seconds were observed. As on previous years, shorter overdense echoes came earlier than the longer, especially the overdenses longer than 1 minute, that peaked on November 19th.
Many other swarms were also active, showing quite a number of reflections longer than 10 seconds. Particularly interesting was the period 27-29th of November for which the IAU-meteor list prominently points to the November Orionids (NOO), but these can hardly be the source of the peaks shown by our graphs, since at the time of our maxima the NOO-radiant was under the local horizon. – To be further examined.
Some screen-dumps of a selection of eye-catching long duration reflections are displayed (Figures 3 to 12).
If you are interested in the actual figures, please send me an e-mail: felix.verbelen at skynet.be.