An overview of the radio observations during August 2019 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 August 2019.
The hourly numbers, for echoes shorter than 1 minute, are weighted averages derived from:
N(h) = n(h-1)/4 + n(h)/2 + n(h+1)/4
During this month the registrations were quite often disturbed by moderate local interferences, on 3 days by weak “sporadic E” (Es) and on 5 days by sometimes strong lightning activity.
The automatic countings were manually corrected in order to eliminate as much as possible the effects of these disturbances.
The Perseids were of course the main meteor shower of the month, showing many radio reflections lasting longer than 10 seconds on both the 13th and 14th. Surprisingly, reflections lasting longer than 1 minute were observed mainly on August 13th but were far less numerous on August 14th.
As in previous years, the general meteor activity was important the days before the main peaks of 13th and 14th August, and sharply decreased thereafter.
The eye-catcher of the month was a more than 3 minutes reflection on August 13th, starting at 23:31 UT (Figure 12).
SpecLab pictures of this and of a small selection of other eye-catching reflections are displayed in Figures 3-14.
If you are interested in the actual figures, please send me an e-mail: felix.verbelen at skynet.be.