Abstract: An overview of the radio observations during September 2021 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 2021.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
Local interference and unidentified noise remained moderate during most of the month. On 4 days lightning activity was observed.
During this month no real eye-catching shower was active, but the activity remained quite interesting, showing both a number of minor showers and a fair number of long reflections.
Determining the radiant of minor showers on the basis of forward scatter isn’t strait forwards but nonetheless usually possible if several parameters are taken into account. Some of these are the time of greatest activity, the type of reflection (underdense vs. long lasting overdense), the approximate velocity derived from measurable head echoes and others. In the absence of suitable software, careful examination of all of these can be very time consuming and a challenge, but at the same time quite rewarding!
This month 13 reflections longer than 1 minute were observed here. A selection of others striking or strong reflections is also added in this report (Figures 3 to 11).
If you are interested in the actual figures, or in plots showing the observations as related to the solar longitude (J2000) rather than to the calendar date, I can send you the underlying Excel files and/or plots. Please send me an e-mail; felix.verbelen at skynet.be.
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 2021.
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 2021.
Figure 3 – Meteor reflection 1 September 2021, 22h30m UT.
Figure 4 – Meteor reflection 8 September 2021, 06h15m UT.
Figure 5 – Meteor reflection 8 September 2021, 07h10m UT.
Figure 6 – Meteor reflection 12 September 2021, 04h45m UT.
Figure 7 – Meteor reflection 12 September 2021, 11h35m UT.
Figure 8 – Meteor reflection 14 September 2021, 0h50m UT.
Figure 9 – Meteor reflection 15 September 2021, 11h25m UT.
Figure 10 – Meteor reflection 26 September 2021, 02h10m UT.
Figure 11 – Meteor reflection 26 September 2021, 12h45m UT.
