An overview of the radio observations during May 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 May 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 our registrations were quite often affected by moderate local interference, on 8 days by “sporadic E” (Es) and on 6 days by lightning activity.
The automatic countings were manually corrected in order to eliminate as much as possible the effects of these disturbances.
Highlights of the month were as expected the Eta Aquariids that peaked on May 5th, and which produced several radio echoes lasting more than 1 minute.
Several other showers were quite active, with also a number of eye-catching long duration reflections. SpecLab pictures of a selection of these are attached.
If you are interested in the actual figures, 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, 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 May 2019.
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 May 2019.
Figure 3 – Echo registered on 4 May 2019 at 09h00m UT.
Figure 4 – Echo registered on 5 May 2019 at 06h30m UT.
Figure 5 – Echo registered on 5 May 2019 at 07h25m UT.
Figure 6 – Echo registered on 6 May 2019 at 07h35m UT.
Figure 7 – Echo registered on 16 May 2019 at 10h25m UT.
Figure 8 – Echo registered on 20 May 2019 at 00h50m UT.
Figure 9 – Echo registered on 20 May 2019 at 10h55m UT.
