Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
en:support:faq [2018/10/14 18:10]
gerbold [Why do we need a GPS?]
en:support:faq [2020/04/09 16:47]
gerbold [How to configure for the very first time?]
Line 74: Line 74:
 ===== How do I access the system interface? ===== ===== How do I access the system interface? =====
  
-Check whether the host name blitzortung is known in your network: in a shell use the command 'ping blitzortung'​. If thgis works, type into your web-browser http://​blitzortung/​. As an alternative check your router to identify the IP address of the blitzortung controller.+Check whether the host name blitzortung is known in your network: in a shell use the command 'ping blitzortung'​. If this works, type into your web-browser http://​blitzortung/​. As an alternative check your router to identify the IP address of the blitzortung controller.
  
 ===== How to configure for the very first time? ===== ===== How to configure for the very first time? =====
Line 81: Line 81:
  
 First, put the station in Manual Mode..,. Automatic will drive the gains up and down, and you can cycle in and out of interference.\\ First, put the station in Manual Mode..,. Automatic will drive the gains up and down, and you can cycle in and out of interference.\\
-Make Sure your antennas and amp are NOT near noise sources.... ​ Make sure you have a good power supplly... +Make Sure your antennas and amp are NOT near noise sources.... ​ Make sure you have a good power supply... 
  
 then...\\ then...\\
Line 90: Line 90:
 We've two types of junk we're looking at... "​always there",​ and "​Sporadic"​...\\ We've two types of junk we're looking at... "​always there",​ and "​Sporadic"​...\\
 Now, the "​always"​\\ Now, the "​always"​\\
-adjust thresholds first, then / or gain for that channel so that the '​always'​ noise DOES NOT trigger a signal...and apply / save.  Try to accomodate ​gains so that you can keep the standard threshold at 100MV if possible. ​ You may then adjust it later on a specific channel... ​ Now your '​ambient'​ always present sources shouldn['​t trigger anything... Call this Baseline #1\\+adjust thresholds first, then / or gain for that channel so that the '​always'​ noise DOES NOT trigger a signal...and apply / save.  Try to accommodate ​gains so that you can keep the standard threshold at 100MV if possible. ​ You may then adjust it later on a specific channel... ​ Now your '​ambient'​ always present sources shouldn['​t trigger anything... Call this Baseline #1\\
 Then...\\ Then...\\
-**Ideally**,​ you want to operate so that the WORST sporadic interference doesn'​t trigger a signal. You're still in absolute manual, ​withf the optional filters off.  That should put you into '​ambient'​ operation Baseline #2... while doing this, keep your threshold at least twice what the ambient 'noise grass' (no signal) level may be.+**Ideally**,​ you want to operate so that the WORST sporadic interference doesn'​t trigger a signal. You're still in absolute manual, ​with the optional filters off.  That should put you into '​ambient'​ operation Baseline #2... while doing this, keep your threshold at least twice what the ambient 'noise grass' (no signal) level may be.
  
 If you have an obvious noise source at , say 150kHZ, you could adjust the optional filter to cut off at about 130-140 kHz... you'd monitor each channel, for a period of time, diurnally, weekends, etc... and gradually fine tune these settings.... ​ Now, what you determine this week, may change in July... or November... simply because the total environment changes... If you have an obvious noise source at , say 150kHZ, you could adjust the optional filter to cut off at about 130-140 kHz... you'd monitor each channel, for a period of time, diurnally, weekends, etc... and gradually fine tune these settings.... ​ Now, what you determine this week, may change in July... or November... simply because the total environment changes...
Line 101: Line 101:
 Later on, you might experiment with Automatics... but you're going to be chasing ghosts if you operate that way while establishing you ambient operating baselines,​... wasting your time, and peace of mind.  Over the years I've experimented with the autos... and determined that in my environment they are basically worthless for consistent operation.... that is NOT true for many stations, but you may very well be a member of the "Cutty Sark Sailor Manual Mode Mob"​...... Later on, you might experiment with Automatics... but you're going to be chasing ghosts if you operate that way while establishing you ambient operating baselines,​... wasting your time, and peace of mind.  Over the years I've experimented with the autos... and determined that in my environment they are basically worthless for consistent operation.... that is NOT true for many stations, but you may very well be a member of the "Cutty Sark Sailor Manual Mode Mob"​......
  
 +===== How do you know station is working at optimal performance?​ =====
 +
 +original source (([[https://​forum.blitzortung.org/​showthread.php?​tid=3166&​pid=21996#​pid21996|]],​ Egon))
 +
 +Here are a few words to adjust the detector using the following graphic.
 +
 +[[https://​map.blitzortung.org/​statistic_1.php?​|]]
 +
 +See here for the parameters: [[https://​forum.blitzortung.org/​showthread.php?​tid=3144|]]
 +
 +The white curve:
 +The white curve shows the absolute number of signals sent over the past two hours. The scale is on the right side of the table. The value is normally between 100 and 10000. With high values (> 8000) there is usually a fault, see also the explanation of the red background lines. In the event of interference,​ set the gain lower or set the threshold somewhat higher (150mV)
 +
 +The yellow curve:
 +The yellow curve shows the relative number of signals sent that were accepted after simple checks. Here it is checked whether the signal is actually a pulse. The yellow curve should mostly be over 80%. Otherwise, the signal / noise ratio is either too small or the signals have no pulse shape or are superimposed too strongly with other signals. If the yellow curve is low and the number of signals is high, then usually only noise is received. Set the gain somewhat weaker or set the threshold somewhat higher (150mV). Reposition your antenna to a different location to compare the different locations.
 +
 +The green curve:
 +The green curve shows the relative number of accepted signals that could be assigned to the localized lightning strikes. This should be at least 10%, the more the better. If the thunderstorm is very far away, high values cannot be reached here. However, if the green curve is always zero, then the received signals are exclusively noise with a pulse shape and not flash signals. Please check your antenna system and location.
 +
 +The blue curve:
 +The blue curve shows the relative number of assigned signals that was actually used for the calculation. Only a suitable selection of the assigned signals is used for the actual calculation. If the blue curve shows high values, your station is extremely important at the moment for calculating the lightning strikes of the current thunderstorm. In general, the blue curve will always show something when the green curve shows something. If the blue curve shows nothing, even though the green curve has high values, then this is not a problem. In these cases, you just have to wait until the thunderstorm is in a reception group that you cover better than the other stations.
 +
 +
 +The vertical lines indicate error situations. The most common errors are bad GPS (blue) and interference (red). If the GPS is poor, you should check the GPS antenna. In the case of interference situations, you should observe whether you appeared regularly at certain times. As a result, the sources of interference can often be localized, e.g. Christmas lights after dusk. Note that you can display the graphic up to the minute grid.
 +
 +Another basic thing: Do not operate your detector permanently in automatic mode, but always in manual mode in the long term. In order to find the correct amplifier setting for trouble-free operation, you have to watch your station for a long time, during thunderstorms and without thunderstorms. Leave the threshold in the range 100 to 150 mV. It is more appropriate to work with a lower threshold (100mV) and a lower gain.
 +
 +Single numerous indices about the efficiency or effectiveness of the detector have a high entertainment value (after all, our hobby should also be fun), but are not well suited to adjust the station. I will show you examples of well-tuned stations and stations that are not so well tuned.
 ===== What are the most important settings in the system interface? ===== ===== What are the most important settings in the system interface? =====
  
Line 334: Line 362:
 ===== What are these funny wiggles before/​after my signals? ===== ===== What are these funny wiggles before/​after my signals? =====
  
-Compression ​artefacts.\\ +Compression ​artifacts.\\ 
-In order to save bandwidth the analog signal is (optionally) compressed before ​sendig ​it to the Blitzortung server. This compression is lossy. The server "​restores"​ the noise as a certain number of samples with a min and max level as zigzag.+In order to save bandwidth the analog signal is (optionally) compressed before ​sending ​it to the Blitzortung server. This compression is lossy. The server "​restores"​ the noise as a certain number of samples with a min and max level as zigzag.
  
 If the data compression is enabled... you won't see it on your local signals page, but it is often visible on your station signals page on the server, if the feature is being '​shown'​... it looks like a series of 'hash marks' or '​interference'​ obscuring portions of you '​server'​ displayed signal... that data is 'not used'. If the data compression is enabled... you won't see it on your local signals page, but it is often visible on your station signals page on the server, if the feature is being '​shown'​... it looks like a series of 'hash marks' or '​interference'​ obscuring portions of you '​server'​ displayed signal... that data is 'not used'.
Line 376: Line 404:
 to time to improve the system and to add new features. If you have own suggestions,​ then you are to time to improve the system and to add new features. If you have own suggestions,​ then you are
 welcome to tell us about them, so we could integrate them in the next release. SMD versions of the welcome to tell us about them, so we could integrate them in the next release. SMD versions of the
-PCBs are available with System ​BLue.+PCBs are available with System ​Blue.
  
 ===== Is it possible to build such a hardware with RaspberryPi,​ Arduino or similar? ===== ===== Is it possible to build such a hardware with RaspberryPi,​ Arduino or similar? =====