Leonids 1999 from the Ondrejov backscatter radar

white line: foreground before shower activity (instrumental profile) = average of Nov 14/15 and Nov 16/17
red line: 17/18 Nov 1999, maximum at 2:08 UT (from operator's records)
green line: no activity Nov 18/19 (background)
x-axis: time in UT
y-axis: hourly meteor echo rates, not corrected for sensitivity change.

green line: 14/15 Nov 1999, foreground before shower activity
red line: 16/17 Nov 1999, the record just follows the foreground (instrumental) profile, there was a strong interference at 9-13 UT, so faint meteors cannot be detected and counted, that is why the numbers are lower
x-axis: time in UT
y-axis: hourly meteor echo rates, not corrected for sensitivity change.

Updated: 19 Nov 1999, 6:00 UT