(meteorobs) [radiometeoren] Re: Question about airplane and automatic counting Spectrum Lab

[maarten.vanleenhove at telenet.be]

If someone would find a solution for this, I 'd like to hear about it! 


kind regards, 


Maarten 

----- Oorspronkelijk e-mail -----

Van: "ernottp" <ernotp at gmail.com> 
Aan: cm2esp at gmail.com 
Cc: "Meteor science and meteor observing" <meteorobs at meteorobs.org>, radiometeoren at vvs.be 
Verzonden: Donderdag 12 september 2013 10:58:45 
Onderwerp: [radiometeoren] Re: Question about airplane and automatic counting Spectrum Lab 



Hi, 
Maarten Vanleenhove wrote a script for Spectrum Lab in which he it tries to avoid false detections due to aircrafts. 
His url is: 
http://www.supernovae.be/meteorcounting 
However, errors occur . 
Following him: " When two aircrafts reflections merge, the script will, due to the signal width, assume a meteor was picked up. When large meteors appear, sometimes the meteors will be double counted" 

I do not use this script because we detect too many intersections of aircrafts (beacon at Dourbes in Belgium 49.97Mz) 


Pierre Ernotte 









2013/9/11 Raydel Abreu (CM2ESP) < cm2esp at gmail.com > 










Hello all, 

Recently, by September 6th I was able to migrate my radio forward scatter system from 187 MHz TV to 61 MHz TV. Obviously as the frequency is lower a very high increment in rates is present. 

With the previous system a manual counting was performed so false positives by airplane traces were ignored. As my new system is peaking 150 meteor traces by hour as an average manual counting is impossible. 

A modified script for SpectrumLab based on the meteor_test distributed on the software installation package was written to track the weak but sporadic present direct signal carrier and it works very great. 

However, at least one or two times a day some airplanes gets into the working pass-band and produces a lot of false positives; producing false "hotspots" which difficult to identified as airplanes produced or real meteors outburst like the one recently detected by some members. 

Any advice or tips??? Or a recommended better script to deal with this "airplane outburst". The happening of this problem is very seldom, but still affecting data quality. See efficiency and the "hotspots" in the attached picture. 

Thanks and best wishes, 

Raydel, CM2ESP 
Havana, Cuba. 

Imágenes integradas 1




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