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--- en:data-outputs [2017/01/05 18:31] – [Bolidozor data outputs] fluktuacia
+++ en:data-outputs [2017/01/05 18:39] – [Spectral records description] fluktuacia
@@ Line 19: / Line 19: @@
 ===== Spectral records description =====
-Visual records, viewable by [[http://space.astro.cz/bolidozor/support/js9browser/|JS9browser]], have a form of a so-called [[https://en.wikipedia.org/wiki/Spectrogram|spectrograms]], showing frequency on one and time on the other axis.
+Visual records, viewable by [[http://space.astro.cz/bolidozor/support/js9browser/|JS9browser]], have a form of so-called [[https://en.wikipedia.org/wiki/Spectrogram|spectrograms]], showing frequency on one and time on the other axis.
 In our case:
@@ Line 34: / Line 34: @@
 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.
-Following 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 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.