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en:data-outputs [2019/04/24 13:39]
fluktuacia [Records generation]
en:data-outputs [2019/04/25 15:33] (current)
fluktuacia [Spectral records description]
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-The radar emitting frequency corresponds to the vertical intersected with the average positions of the meteor trails. This signal is static and thus has almost entirely zero [[https://​en.wikipedia.org/​wiki/​Doppler_effect|Doppler shift]]. ​+The radar emitting frequency corresponds to the vertical ​line intersected with the average positions of the meteor trails. This signal is static and thus has almost entirely zero [[https://​en.wikipedia.org/​wiki/​Doppler_effect|Doppler shift]]. ​
    
 {{:​cs:​outputs:​js9browser_meteor.png?​600|A typical picture of meteor generated by JS9Browser programme.}} {{:​cs:​outputs:​js9browser_meteor.png?​600|A typical picture of meteor generated by JS9Browser programme.}}
  
  
-The lower portion of the record shows a head-echo - a signal, always beginning at higher frequencies than the meteor trail. Head-echo is a signal formed by the reflection from an ionised plasma at the front of the meteor during its fly-by. It is a moving object whose signal (due to a considerable speed up to tens of km/s) has a large doppler shift that passes through zero (at the point of the shortest sum of distances transmitter -> meteor -> receiver). Some meteors lack head-echo signal as the geometry of their fly-by does not allow the reflection ​to the receiver station. On the other side, other meteors have a head-echo extending even behind the point of the zero doppler shift.+The lower portion of the record shows a head-echo - a signal, always beginning at higher frequencies than the meteor trail. Head-echo is a signal formed by the reflection from an ionised plasma at the front of the meteor during its fly-by. It is a moving object whose signal (due to a considerable speed up to tens of km/s) has a large doppler shift that passes through zero (at the point of the shortest sum of distances transmitter -> meteor -> receiver). Some meteors lack head-echo signal as geometry of their fly-by does not allow reflection ​towards ​the receiver station. On the other side, other meteors have a head-echo extending even behind the point of the zero doppler shift.
  
-Following ​on the area of the head-echo signal there is an area of a static reflection from the meteor trail. Its intensity varies in time. The change in intensity is caused by a progressive recombination of the plasma trail of the meteor and the periodic changes in intensity are caused by a space modulation of the radar signal.+Following the area of head-echo signal there is an area of a static reflection from the meteor trail. Its intensity varies in time. The change in intensity is caused by a progressive recombination of plasma trail of the meteor and periodic changes in intensity are caused by a spatial ​modulation of the radar signal.
  
 ==== FITS header content ==== ==== FITS header content ====
en/data-outputs.txt ยท Last modified: 2019/04/25 15:33 by fluktuacia