Abstract: An overview of the radio observations during April 2025 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 April 2025.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
Local interference was minimal during this month and no lightning activity was recorded. However, quite strong solar type III eruptions were observed on several days.
Meteor activity was generally low but increased towards the end of the month.
As expected, the Lyrids reached their peak on April 22nd, as evidenced by the counts of overdense reflections.
Six reflections exceeding one minute in duration were recorded over the entire month.
A selection of these, along with a few other interesting recordings is included (Figures 3 to 16).
In addition to the usual graphs, you will also find the raw counts (subject to strict reservations as previously said) 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 April 2025.
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 April 2025.
Figure 3 – Meteor echoes April 1, 7h15m UT.
Figure 4 – Meteor echoes April 8, 13h30m UT.
Figure 5 – Meteor echoes April 9, 6h55m UT.
Figure 6 – Meteor echoes April 16, 8h30m UT.
Figure 7 – Meteor echoes April 18, 3h15m UT.
Figure 8 – Meteor echoes April 22, 1h35m UT.
Figure 9 – Meteor echoes April 22, 3h00m UT.
Figure 10 – Meteor echoes April 22, 4h10m UT.
Figure 11 – Meteor echoes April 22, 5h25m UT.
Figure 12 – Meteor echoes April 22, 6h55m UT.
Figure 13 – Meteor echoes April 24, 2h40m UT.
Figure 14 – Meteor echoes April 28, 0h50m UT.
Figure 15 – Meteor echoes April 28, 10h50m UT.
Figure 16 – Meteor echoes April 30, 5h10m UT.
