Visibility III / V
Quite a perfect morning. The first snow on the ground and looking through the images from the sky camera found a definite observation of the upper flashes!
In the first picture, the actual observation. Below the moon are three fairy flashes that would appear to be of the carrot sprite type. Based on the timing (Fig. 2, selelt below), all three have flashed at the same time, 00.46.30.18 Finnish summer time. The flash of the parent flash below them is recorded as 00.46.29.94, 00.46.29.98, and 00.46.30.18, respectively.
I glanced at the data of the Blitzortung flash locator network (map in the third picture) and found three locations in the right area (near Hiiumaa) for the same second. The closest in time was about 0.06 s earlier than the times of the images. This is practically a perfect hit, given the synchronization accuracy of the NTP time server and the delay that usually occurs between the parent flash and the resulting flash. The distances to these three locations are 140, 220 and 230 km. According to preliminary data, according to IL location data, the distance would be about 150 km.
The time calculated from the beginning of the stack is stored in the timing image so that the elapsed time can be calculated from the pixel values of the different color channels as follows (in milliseconds):
t = R * 2 ^ 16 + G * 2 ^ 8 + B
In the past, this has been tested with fireballs, but now it is also possible to schedule a top lightning!
As long as more detailed analyzes can be done (probably next week), I’ll put more information here too.
EDIT : Based on that maximum stack and timestamps, I calculated such a reconstruction video: http://www.youtube.com/watch?v=Zq2sP-0y4WA . The video is "real-time," meaning the frames repeat at the right speed. Works pretty well, and contrast improves when not all flash lights are visible at the same time. There is also one previously unnoticed dim fairy-tale pole shape!
I also made a few videos about fireballs with the same technique, I should put links to similar observations as long as I have time. And write on the forum with some description of the method.