Abstract: An overview of the radio observations during September 2023 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 September 2023.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
Due to problems with the transmitting antenna, the beacon signal was unstable and weakened on many days during the month, especially in the period September 15 to 18. Therefore, observations for this period have been excluded from the counts and the automatic counts of “all” reflections for the other days are given with reservations.
During the month, local or unidentified noise remained rather low, but moderate to strong solar outbursts occurred almost every day. Some examples are attached (Figures 3 to 8). There was lightning activity on 4 days, which was quite intense on September 11 and 22.
Overall meteor activity was moderate, with a clear increase in overdense reflections during the first half of the month and daytime activity during the last days. Throughout the month, 12 reflections longer than 1 minute were observed, the most spectacular occurring during the last days of the month. A small selection of these, along with some other interesting reflections is included (Figures 9 to 16). Many more of these are available on request.
In addition to the usual graphs, you will also find the raw counts in cvs-format from which the graphs are derived. The table contains the following columns: day of the month, hour of the day, day + decimals, solar longitude (epoch J2000), counts of “all” reflections, overdense reflections, reflections longer than 10 seconds and reflections longer than 1 minute, the numbers being the observed reflections of the past hour.