Display the RF-Seismograph in real-time on your page... includes NOAA warnings

Discussion in 'Amateur Radio News' started by VE7DXW, Nov 10, 2017.

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  1. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi Everybody;

    Let the world know that there is always propagation!!!

    We came up with a way to add the RF-Seismograph display to your QRZ.com page. It is just as simple as editing your QRZ profile and by adding the HTML code below.

    We updated N2EU's profile: to check it out click on the link below or go to his QRZ.com profile.
    https://www.qrz.com/db/N2EU

    Note: it is also possible to add the RF-Seismograph to your website and other social networking sites.

    RF-Propagation for North West USA and South Western Canada

    [​IMG]
    How to read the graph:

    When the line goes wide there is propagation but not necessarily a man-made signal. The absolute value of the noise level is not important for propagation, but it is interesting to watch how the noise changes over time. Slow changes are usually made by the ionosphere (5min and longer). The slower the rise of the signal the further away it originated. Fast changes are man-made signals, hence vertical lines…

    The black bottom graph is easier to read when it comes to propagation. The grayscale indicator shows propagation for all the bands according to color codes as in the sig/time graph. White is best propagation.





    Easy steps:
    1. Go to www.qrz.com login and go to your page. Click on Edit and the select "Edit <yourCallsign>"
    2. Click on "Add or edit your biography text, fonts, etc. "
    3. When the HTML editor opens click on "Source". This will change the page into HTML code. So that you can add the code just below.
    4. Highlight the HTML code below and copy it to the clipboard.
    5. Find the location in the HTML document where you would like to place the RF-Seismograph and paste the code from your clipboard to the page.
    6. Click the "Source" button again and then you can see what your new QRZ.com page looks like.
    7. Press "Save" to update your page. If it does not look right press "Cancel" and start over.

    If you have any trouble please answer this post and we will sort it out for you.

    If you are interested in volunteering your station for the RF-Seismograph please visit our website and contact us.
    http://users.skynet.be/myspace/mdsr/


    All the best and 73;

    Alex - VE7DXW

    =============================================================================

    <p><u><strong>Local&nbsp; RF-Propagation for North West USA and South Western Canada</strong></u></p>

    <p><strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (realtime - updated every 10 min) &nbsp; &nbsp;<span style="color:#0000FF"> </span><a href="http://www3.telus.net/public/bc237/MDSR/VE7DXW_propList.htm"><span style="color:#0000FF">List of the last 6h</span></a></strong></p>

    <p><img alt="RF-Seismograph Image" src=" " style="float:left; height:243px; width:437px" /><img alt="RF Seismo Legend" src="http://www3.telus.net/public/bc237/MDSR/VE7DXW_RF-Seismo Legend.png" style="height:243px; width:288px" /></p>

    <p><strong><u>How to read the graph:</u></strong></p>

    <p>When the line goes wide there is propagation but not necessarily a man-made signal. The absolute value of the noise level is not important for propagation, but it is interesting to watch how the noise changes over time. Slow changes are usually made by the ionosphere (5min and longer). The slower the rise of the signal the further away it originated. Fast changes are man-made signals, hence vertical lines&hellip;</p>

    <p>The black bottom graph is easier to read when it comes to propagation. The grayscale indicator shows propagation for all the bands according to color codes as in the sig/time graph. White is best propagation.</p>
     
    KI7KCW and N8QQE like this.
  2. WR2E

    WR2E Ham Member QRZ Page

    On the upper graph, why are the bands all on top of each other? Seems it would be easier to see openings if they were spaced out like the lower graph.
     
    VE7DXW likes this.
  3. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi WR2E;

    When the graphs are on top of each other that means the have the same noise level. You could place each one on a separate scale, but then you loose the possibility to easily compare them.

    When there is no propagation each graph is single line. When there is propagation you can see the different colors pop up accordingly. Propagation changes very slow so even though one line is temporarily obscured it will pop up in about 1/2h or so.
    You can also use the bottom graph to see how well the propagation woks in the North West.

    If you run your own RF-Seismograph you can turn off the traces of different bands for better viewing. Unfortunately this is not possible with an web image.

    All the best;

    Alex - VE7DXW
     
  4. WR2E

    WR2E Ham Member QRZ Page

    Oh, you can configure the display?

    How much of it is configurable? Width? Vertical sensitivity?
     
    VE7DXW likes this.
  5. VE7DXW

    VE7DXW XML Subscriber QRZ Page

  6. WR2E

    WR2E Ham Member QRZ Page

    Thanks Alex! I have a better understanding now!

    My radio has an 8.83 MHz IF output, am I SOL?
     
    VE7DXW likes this.
  7. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    You could buy a transceiver with a broken PA that has 455kHz IF..

    Just an idea;

    Alex
     
  8. KE4PWE

    KE4PWE Ham Member QRZ Page

    Alex, do you have a volunteers on the east coast of the US and Canada yet, that I could use their file, instead of dedicating a rig to it presently? Also, have you tried using any SDR, like NOOELEC devices?

    thanks, 73.
     
  9. N6YFM

    N6YFM XML Subscriber QRZ Page

    In your HTML example, you missed the actual graph. You have HTML code for the list format, and for the color legend, but
    the part for the actual graph is missing. That missing HTML for the graph would apparently be;

    <img alt="RF-Seismograph Image" src="http://www3.telus.net/public/bc237/MDSR/VE7DXW_RF_Seismo.png" style="float:left; height:243px; width:437px" />

    You basically forgot to put the above URL inside the src= quotes.

    However, even that is a static image file. Your example HTML lacks any JavaScript to cause the graph photo
    to update every 10 minutes. Of course, if someone refreshes their web page on QRZ, that would download
    the latest graph photo, so that is OK.

    Cheers,

    Neal
     
    N8QQE and VE7DXW like this.
  10. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi Neal;

    SDRs have very low amplitude accuracy and are too noisy for the this task.
    Our DSP uses 24bit audio resolution - that means there are 24 million measurement points. A 14 bit SDR only has 16384 individual steps which is not ideal for this application.
    SDRs with the same bit resolution as a sound cards do not exist yet and would cost too much!

    All the best;

    Alex - VE7DXW
     

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