An overview of the radio observations during June 2020 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 June 2020.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
The counts, and in particular the automatic counts, were sometimes complicated by (local) interference, strong unidentified noise and on seven days by often intense lightning activity. On June 17th, 18th and 26th, lightning discharges occurred in the vicinity of our radio beacon. On SpecLab images they usually look very similar to meteor reflections (see Figures 3 and 4), but these lightning reflections are distinguishable from meteors because they are broadband and don’t show head echoes.
Most counting errors were corrected manually, sometimes by comparing the registrations on 49.99 MHz with observations on 49.97 MHz (BRAMS beacon at Dourbes).
As expected, the general picture of the activity this month was determined by the known day showers, the Arietids (ARI) being the eye catchers. The greatest activity of this shower was observed here on June 6th. Figure 7 is a 5-minute SpecLab registration on June 6th. Also during the rest of the month, there were numerous smaller showers, mostly daylight showers, as the counts of all “overdense” reflections clearly show.
During this month, numerous reflections longer than 1 minute were recorded. SpecLab recordings of a number of these and other interesting reflections are attached. (Figures 5, 6 , 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 and 18).
If you are interested in the actual figures, please send me an e-mail: felix.verbelen at skynet.be.