Abstract: An overview of the radio observations during December 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 December 2021.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
Local interference and unidentified noise remained moderate or low for most of the month and no lightning activity was detected. Due to maintenance work in the vicinity of the beacon antenna, our beacon had to be switched off on December 8th between 12:08 and 14:37 UT and on December 9th between 07:38 and 10:31 UT; data is missing for those short periods.
The eye-catchers of the month were, of course, the Geminids, but the Ursids were also prominent on December 22nd.
This month, only 6 reflections longer than 1 minute were observed here, all in the first half of the month. A selection of these, along with some other interesting registrations, are displayed in Figures 3 to 7.
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.