Re: Fireball over the Baltic Sea - Final Remarks
A clarification please about the data collection method.
Are the receivers that were used during the Baltic Event tuned to
know stations transmitting on a know frequency, or were the
receivers "broad" tuned receiving a wide range of frequencies? If so
what is the tuned frequency range during the event? Or are the
receivers tuned to a frequency that has not know beacon or signal?
Were filters used? Specific filters to tune at what frequency range?
I was under the original impression that the signature was received
on the Yorkshire based receiver (one receiver), how many receivers
were in operation at the time of the event? And how may were
recording data? What frequency range was of interest at the time of
What stations were operating within 100 Km of the flight path?
Sorry for the long inquiry.
--- In VLF_Group@yahoogroups.com, "df3lp" <df3lp@...> wrote:
> Hi All
> Paul wrote:
> > ...
> > That rules out their connection with the fireball.
> > I don't propose to do any more work on this recording unless
> > a good timeline for this fireball becomes available.
> No news about timetracks or trajectory. Only this: my old 75 kHz
> receiver does not show any sign from the meteor fall.
> At 6th of Jan. I lost net contact to the old narrow band 75 kHz
> receiver and I had no opportunity to look for what happened. We
> about the final stop of that honourable receiver. RIP onto a
> death after many years of service?
> Not at all!
> Last week I went out to that location to see what happened. It was
> mains fault, running out off UPS. I do not fully understand why,
> that old 486/66 notebook (yes: 16mb RAM, Linux, kernel 2.0/2.2)
> restarted registration when UPS had been reloaded after 34 hours.
> Unfortunately it could not restart the net service (PCMCIA) and
> therefore no NTP was available. To my surprise the kernel-pll could
> track the time error down to -2.3 sec over 3 weeks! It was a simple
> task to check this since the time stamps are visible *inside* the
> Collecting now all available data from here (4 receivers inside a
> radius of 100-150 km from "ground zero") I can confirm that *this*
> fireball, with steep impact and a huge final explosion below 20km
> height did not emit any significant LF/VLF signal and did not
> significantly alter the ionosphere.
> 54N 10E
- GJD wrote:
> A clarification please about the data collection method.Todmorden was the only one recording broad band audio. Others
> Are the receivers that were used during the Baltic Event
> tuned to know stations transmitting on a know frequency,
> or were the receivers "broad"
were using SID monitors which either record the level of some
specific military signals, or record a power spectrum at frequent
Nobody has picked up anything that can be attributed to the
fireball. Perhaps we'll have better luck next time - by then
hopefully a few more receivers will be recording full time.