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.
Figure 1 – The daily totals of “all” reflections counted automatically, and of manually counted “overdense” reflections, as observed here at Kampenhout (BE) on the frequency of our VVS-beacon (49.99 MHz) during September 2023.
Figure 2 – The hourly numbers 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 September 2023.
Figure 3 – Solar outburst 17 September 2023, 15h00m UT.
Figure 4 – Solar outburst 17 September 2023, 17h05m UT.
Figure 5 – Solar outburst 20 September 2023, 14h20m UT.
Figure 6 – Solar outburst 21 September 2023, 12h55m UT.
Figure 7 – Solar outburst 22 September 2023, 16h35m UT.
Figure 8 – Solar outburst 24 September 2023, 15h00m UT.
Figure 9 – Meteor echo 10 September 2023, 22h35m UT.
Figure 10 – Meteor echo 12 September 2023, 23h10m UT.
Figure 11 – Meteor echo 17 September 2023, 05h40m UT.
Figure 12 – Meteor echo 22 September 2023, 07h10m UT.
Figure 13 – Meteor echo 26 September 2023, 05h20m UT.
Figure 14 – Meteor echo 29 September 2023, 12h25m UT.
Figure 15 – Meteor echo 30 September 2023, 05h50m UT.
Figure 16 – Meteor echo 30 September 2023, 06h45m UT.
