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Question Determining lightning polarity (positive or negative) by raw signal processing?
Posted by: ThunderStorm - 2017-08-20, 17:12 - Forum: Hardware, Software, Lightning Physics - Replies (20)

Hello, my name is Oana Liviu from Romania and I am currently operating the station number: 951 from Resita, Romania (system RED).

It is well known that if you use two perpendicular antennas, if you position them to N-S/W-E and you wire them correctly, you can get an estimate of the direction of the strike by processing the raw signal data (see attached image). This can be acheived by calculating the arctangent of the ratio between the signals coming from each antenna among some other calculations.

Let's say that one is able to determine a relatively correct direction of the signal.

My question is: if the calculated direction by the means posted above is somewhat the opposite of the real direction (the strike is located to the south-west, but the calculation yields a north-east direction), that means that that strike have a positive polarity? Considering the calculations have been correctly done?

I am considering some experiments based on this and I want to know if I'm heading in the right "direction".

Thanks Wink



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  Square not showing earlier strikes
Posted by: RonnyKrijt - 2017-08-19, 20:41 - Forum: General Discussion - No Replies

When looking at the Lake Garda area in Italy, a square of 'old strikes' are missing. The new strikes are showing as yellow dots, but older ones, like in other areas are showing.

URL to see is: https://www.lightningmaps.org/?lang=nl#y...;dl=2;dc=0;



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  Activated, but not visible on maps
Posted by: SteveQlQ - 2017-08-18, 13:15 - Forum: General Discussion - Replies (27)

Hello all, I just completed my Blue and the ferrite antennas yesterday. Everything appears to be working correctly, but I do not show up on the maps. Rather than re-invent the wheel, is there a post or file that describes troubleshooting for a noob? I see all the graphs, I believe I have the settings correct, but even though the "signal" light goes on occasionally, I am not appearing on the map or under the station list.

Thanks in advance for your patience.

Steve       Huh

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  NTP-сервер из System Blue
Posted by: flytux - 2017-08-14, 14:15 - Forum: Non-English - Replies (5)

Уважаемые участники, сегодня заказал данный аппарат. Естественно, в руках еще не держал.
Хочу сделать NTP-сервер stratum-1.
Есть ли возможность снимать параллельно данные GPS-времени (NMEA или 1PPS) не мешая основной работе коробки по назначению?

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  Compatible System Blue Optional SMA Connectors
Posted by: KY5G - 2017-08-14, 07:16 - Forum: Hardware, Software, Lightning Physics - Replies (11)

EDIT: I'm changing the purpose of this thread to become a list of SMA connectors reported to work with System Blue main board.  Please submit your full info for part and source as post to this thread.  Thanks!

TE Connectivity Part# 5-1814832-1 / Farnell Part# 1248990 / Newark Part# 13M4002  --- Description:  "5-1814832-1 -  RF / Coaxial Connector, SMA Coaxial, Straight Jack, Solder, 50 ohm, Beryllium Copper:"
-- Reported by "allsorts" and "Andrew.Instone-Cowie"

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original Post:

So, no idea what possessed me NOT to buy the SMA connectors when I bought the station.  Guess I thought that buying them from a supply house over here would not be that difficult.  So far, I own 8 SMA connectors that won't fit the board...  connector housing pins are too large to fit through the PCB holes...

And these were NICE Cinch connectors too....

Do I really have to buy the LPRS from the UK or settle for cheap Chinese UXCELL connectors that don't even have a board standoff ledge on the legs...

I'd really prefer the next batch work and be quality parts...  at least a little better anyway.

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  IP Address Range
Posted by: KY5G - 2017-08-14, 01:35 - Forum: Website, Maps and Applications - Replies (5)

I believe I have identified WHY I have yet to receive my station activation email AND why I never receive an email notification of replies to threads to which I am subscribed...

I OWN my email server.  I ban IP ranges of ISPs, foreigh and domestic, who allow nefarious activity using their IPs if they fail to take action against the malevolent actors.

I suspect that Blitzortung.org is using IPs from such an ISP...

I need someone to clue me in to the IPs used for the email servers and forum and website, so I can add them to my "ALLOW" and "IGNORE" lists on my server so emails will go through BOTH ways.   Big Grin

Thank you in advance!!!

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  Filter orientation - BLUE
Posted by: KY5G - 2017-08-14, 01:25 - Forum: Hardware, Software, Lightning Physics - Replies (2)

Assembly instructions refer to a "point" on the Pin 1 corner of the filter chips.  I see no discernible point.

Perhaps it is a terminology or translation issue.

What is a fool-proof way of making sure the filters are oriented to the board properly prior to soldering?

Is the picture in the instructions correct? Is the printing on the chips consistent?  Can the printing be used as a key to orientation?

Thanks in advance...  I want to get the filters and SMA connectors filled in, so I can get the box on the air!!!

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  LED placement question
Posted by: SteveQlQ - 2017-08-13, 16:10 - Forum: Hardware, Software, Lightning Physics - Replies (5)

Hi: almost finished with the build and no problems so far.

I have a question about the LED order. I know it really doesn't matter, but to be consistent with everyone else, which of the following is correct. I must add that I am somewhat red/green color blind: I can see a lit LED fine, but on a printed page...not so good.

On the front panel picture it appears as if this is the order is (starting L to R with Power)  R, G, G. Y, B, R, R



below that picture it shows the controller board with the order of R (on right of picture, would = Power on front panel), G, G, R, B, then whatever on the right of the front panel (Y,R or R,Y) . I know this is a silly question, but for consistencies sake, I thought it is worth it.

Steve

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  BlitzortungLive Ad banner
Posted by: bobbinnd - 2017-08-13, 01:30 - Forum: Hardware, Software, Lightning Physics - Replies (1)

Why can't I get rid of the Ad banner at the bottom of BlitzortungLive? I have even supported the app, and on a phone it gets in the way and is flat annoying.

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  Location on LightningMaps.org
Posted by: KY5G - 2017-08-13, 01:29 - Forum: Website, Maps and Applications - Replies (8)

Where do we report problems with the LightningMaps.org page?  It's very difficult to figure out who and where to make reports.

Currently the "your location" feature is not working... or at least is not displaying the icon...  some days now.  No changes on my end.

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