Hi Ulrich,
danke für den Hinweis. Für den Funk ist die Unschärfe nicht wirklich erheblich, da die sporadischen Meteore alleine ohnehin kaum zum Erfolg führen. Im Amateurfunk hat sich die Funktion der Web-App, während der Perseiden, schon bestätigt.
Aber Du hast recht, wenn man es macht, sollte man es korrekt machen. Offensichtlich war meine Quelle nicht akkurat. Am Apex selbst ändert dies aber nichts, sondern nur an der Verteilung der Sporadischen am Himmel.
Ich habe hierzu folgendes gefunden:
"[...] Apex Regions
Finally we have the Northern and Southern Apex sources which account for about 25-30% of Sporadics. The Apex is the point in space towards which the Earth appears to be moving as it orbits round the Sun and these meteors are caused by dust moving in a retrograde orbit, that is to say orbiting in the the opposite direction to the Earth. The two sources ar about 15 degrees above and below the Ecliptic, and at 90 degrees away from the sun. The gap between them is thought to be due to the Earth clearing its orbit of debris.
Because we encouter Apex meteors head-on and moving in the opposite direction, they generally have very high velocities and can form bright long-lasting trails, though they’ll be foreshortened near the apparent radiant. Apex meteors are best seen just before dawn because the radiant doesn’t rise till then. [...]"
Quelle:
The majority of meteors are sporadics. Sporadics are pieces of space dust which are not associated with any known meteor shower and in 2022 60% of confirmed meteors in the UKMON dataset were sporadics. The picture below shows all the meteors detected that year, with circles round known showers...
www.popastro.com
Dies ist logisch. Ich werde das bei nächster Gelegenheit mal korrigieren.
CS & Danke
Stefan
