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  resonance frequency
Posted by: JuR - 2015-11-06, 15:17 - Forum: Hardware, Software, Lightning Physics - Replies (7)

Hello, 
i am trying to understand the functionality of B- and E-field antennas, but there is one thing that i dont understand.
Why do the magnetic antennas that are presented in the project description have a resonance frequency? The loops behave like  inductors, but there are no capacitors, so there shouldnt be a resonant circuit?
Greetings,
Julian

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  RED-Controller nach Stromausfall nicht mehr lauffähig
Posted by: BerndKie - 2015-10-31, 18:38 - Forum: Non-English - Replies (1)

Guten Tag,

gestern Nacht hatten wir während eines entfernten Gewitters zwei Mal einen kurzen Stromausfall (je ca. 5 sec.).
Wie ich am nächsten Morgen feststellen mußte funktionierte mein RED-Controller (RED_board 10.4; fw7.4, contr.) seitdem nicht mehr, denn Blitzortung.org meldet 0 (NULL) Signale seit 31.10.2015, 00:49 h, siehe:
http://www.blitzortung.org/Webpages/inde...t_order=de .
Trotzdem steht meine Station (1025) mit dem Status "ONLINE" in der Liste. Mein WLAN-Router weißt den RED-Controller mit "OFFLINE" aus.
Ich versuchte trotzdem mit dem Webbrowser und der korrekten IP einen Connect zum RED, aber wie zu erwarten vergebens.

Sodann betätigte ich sowohl am Controller als auch am Amplifier die Resettaster, löste und schloss alle Kabelverbindungen. Die kleinen LEDs auf beiden Platinen leuchten bzw, blinken wie gewohnt. Es fällt aber negativ auf, daß das Display dunkel bleibt und keinerlei Anzeige macht. Alles änderte nichts daran, daß der Controller nicht mehr sendet.

Bis zu diesem Ausfall arbeitete das System hervorragend und war in der Stationsrangliste von Spanien in der Effectivity M&L meistens auf Platz zwei oder eins.
Gibt es noch eine Hoffnung, den Controller wiederzubeleben?
Muß ich den Controller und/oder Amplifier als nicht reparabel abschreiben oder hat jemand von den Experten noch einen Rettungsvorschlag?

Gerne erwarte ich hilfreiche Vorschläge.
Es grüßt
DonAlarife - Bernd in Sitio de Calahonda an der CostaDelSol Südspanien.

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  The start of lightning: Evidence of bidirectional lightning initiation
Posted by: RichoAnd - 2015-10-25, 16:48 - Forum: General Discussion - No Replies

Article in "Nature" 

http://www.nature.com/articles/srep15180#f1

As PDFfile.: http://www.nature.com/articles/srep15180.pdf

Video.: http://www.nature.com/article-assets/npg...180-s2.mov

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  Interessante Geschichte zu Blitzeinschlägen?
Posted by: BotterSt - 2015-10-23, 13:47 - Forum: Non-English - No Replies

Hallo Forum,

ich bin von einer Redakteurin (Fernsehen) wegen der Blitzortung kontaktiert worden. Sie möchte einen Beitrag über Blitzeinschläge drehen, über das Blitzortungsprojekt soll es dabei auch (kurz) gehen. Sie sucht nun aber nach einem "Aufhänger" für die Story, ihr schwebt eine Erfahrung mit Blitzeinschlägen vor - sie hatte jemanden, bei dem der Blitz im Lauf von einigen Jahren mehrfach eingeschlagen hat, dieser ist aber leider abgesprungen.

Nun meine Frage: hat jemand von Euch eine solche oder ähnliche Geschichte, die er/sie mit dem Fernsehpublikum teilen möchte? Ich kann die Verbindung zur Redakteurin herstellen.

"Fernsehen" heißt hier öffentlich rechtlich, und sachlich, vielleicht mit einem kleinen bisschen Schock.

Vielen Dank für Eure Aufmerksamkeit,

Stefan

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  I need Help
Posted by: huberto - 2015-10-08, 20:49 - Forum: Hardware, Software, Lightning Physics - Replies (7)

Hi

my detector is pcb6 version 3.

where i can find the drivers to connect to windws 7. i can not select a COM because it isnt reconoice by usb.

Someone can help

thankx

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  i need help
Posted by: huberto - 2015-10-05, 18:57 - Forum: Non-English - No Replies

Hi:

Someone can help me to register my station to send information of lighting radar?

thankx

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  Ortungswinkel - locating angle
Posted by: hans.mayer - 2015-10-02, 17:10 - Forum: Website, Maps and Applications - Replies (2)

dear all, 

what is "ortungswinkel" ( locating angle ) ? 
today i noticed a stroke at  02.10.2015 16:12:34.826867174 UTC
location of the lightning was Lat/Lon: -4.405123 / 18.224421 
my possition is: 16 17' 1" East 48 8' 57" North --> JN88dd45at

www.lightningmaps.org tells me that Ortungswinkel is: 189 degress 
accidentally i noticed i get a different value if i calculate the angle. 
on my linux box i have a command line tool called "qth" which tells me 178 degrees.
if i use google earth the result is 177.55 deg which is as rounded value the same as qth's result.
but both are quite different from the result of lightningmaps.org

on other hand i can't believe that ightningmaps.org does bad mathematics.
so my question: what is this value for called in german "ortungswinkel" ? 

kind regards 
hans 

--



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  NeB Q: Will nearby FM Radio Cell towers cause problems
Posted by: br1ght - 2015-09-18, 20:20 - Forum: Hardware, Software, Lightning Physics - Replies (2)

HI All,
I am considering purchasing a Blue (once available) and setting up at my house. My concern is that I have a cluster of several large (120-170 m tall) towers within a 0.3 km of my property. One or more at broadcasting at 93.1 MHz. another lower tower is a cell that may be using HSPA+ technology and eventually LTE... the cluster is due west of my property the direction which most of our Tstorms approach from. 

My question is, will the 'wall of towers' interfere with receiving approaching storms? I realize their broadcast bandwidths are well above the VLF of lighting but will their close proximity limit the receiver's reach to the west  Huh  TIA    

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  Infrasound
Posted by: Bonzo - 2015-09-15, 16:57 - Forum: Hardware, Software, Lightning Physics - Replies (10)

I am wondering whether it would be useful to add an infrasound detector to the Blitzortung System.

Obviously it could register the sound of thunder of a local thunderstorm and add some time information. At least for regions with high station density.

But moreover, there seems to be a correlation of infrasound and the appearance of sprites. [1]

So, to register pulse profiles of the EM wave in conjunction with the infrasound profiles would add a fundamental research experiment to the system.

The sensor could be realized by means of so-called microbarometers. That has to be evaluated. Also the effect of interferers like wind turbines en stuff.

This is just an idea, not a proposal.

What do you think, it this interesting? Feasable? Desirable? Are there people out there that have the skills (and interest) to add according algorithms to the existing software?

Or is that completely out of interest for this project?

BTW: I am connected with the LOFAR radiotelescope [2] where some stations are also equipped with infrasound detectors as a part of the infrasound array of the Dutch meteorology institute KNMI.

cheers
- Bonzo -

[1] http://onlinelibrary.wiley.com/doi/10.10...0/abstract
[2] http://lofar.org/about-lofar/general-inf...troduction

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  Green System PCB 6 Ver 8.0. No Green Light
Posted by: Kalamara - 2015-09-10, 03:38 - Forum: General Discussion - Replies (12)

Just tonite I had finished installing the antenna outside. I turned off the Green system board Pcb 6 ver 8.0


Now when I go to start the tracker program its starts up and then it shuts down right after 2 or 3 seconds.

I have the yellow light blinking GPS blue light  timer to GPS flashing every sec and the red light is on.

Now I dont see the green light going on it is off.  Undecided

Is there any procedure to hard reboot this board so I hope to get the default settings working again and that
the software tracker would be able to communicate to the data board. Sounds like the software is not able to
communicate.

As an update as of 1216am DST I just was able to get the green to stay on by setting the jumpers back on
for the GPS at 9600 baud now thats ok but now the software tracker loads up then shuts down a few seconds later
darn it! Confused  Dodgy Sad

Thanks  Blush  
Paul
Palm Beach Gardens Florida

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