Category Archives: APRS

Find out the next ISS pass with APRS

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Recently I found a twitter post from WA1GOV about a new service he offers (). If you send an APRS message with the content “ISS” to the callsign WA1GOV-10, you will receive the next ISS pass at your location as a message.

The only condition is that you are in the range of a TX-igate and that this TX-igate is aware of your position, so that it sends the message from the APRS-IS back to HF. I had some trouble with this. At the beginning I did not receive the ISS data, but I saw it at aprs.fi, so I sent a couple of more beacons and now I sucessfully received a message back. Beside the ISS there are also the following satellites available: AO-85,AO-91,AO-92,SO-50

QSY Information im APRS Status Text senden – Send QSY frequency as APRS status text

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Wenn man mit APRS unterwegs ist, empfängt man viele andere Stationen, aber weiß meistens nicht, auf welcher Frequenz sie QRV sind, wenn man sie direkt ansprechen kann. Manchmal liest man Texte, wie “QRV auf DB0XH” oder ähnliches. Es gibt jedoch eine Möglichkeit, den Text so zu senden, dass man mit einem geeigneten Funkgerät direkt die Frequenz auswählen und dann Kontakt aufnehmen kann. Wie das geht, steht in der APRS Freq Spec. If you are driving with APRS, you might receive a lot of stations, but you never now how to reach them, if you want to talk to them. Sometimes you read status messages like “QRV on DB0XH”, which gives you a hint, but there is a much better way to transmit the frequency, so that the radio can be tuned to it with a few clicks. This is described in the APRS Freq Spec and I just tried it. And it works!

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Twitter Idee: APRS + Foto + Twitter = #aprsphoto

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Neben Amateurfunk ist auch Fotografie eines meiner Hobbies. Was liegt näher, als beides zu verbinden. Und so hatte ich die Idee einmal zu zeigen, was wirklich hinter den Punkten auf der Karte steckt. Und so entstand der Hashtag “#aprsphoto”

Die Idee ist ganz einfach. Macht ein Foto während ihr mit APRS unterwegs seid und postet es auf Twitter mit dem Hashtag #aprsphoto
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Social media idea: APRS + Photo + Twitter = #aprsphoto

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As I like photographing and hamradio I had the idea to combine both. Every day hams are sending APRS messages from all over the world, but all we see is a dot on a map. Isn’t that sad? Let’s show how it really looks where we do hamradio. Let’s show what’s behind the track on a map!

The idea is to take a photo and send a APRS beacon at the same place at the same time and post both on Twitter using the hashtag #aprsphoto.

I just started:

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Setting Symbol for RX-Igate with pymultimonaprs

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Since a couple of weeks I am running a APRS RX-igate on a Raspberry PI with RTL-SDR dongle and pymultimonaprs. To show on the map that it’s a RX-only Igate it’s recommended to set the black diamond with a “R” overlay as a symbol. To do this you have to use “R” as table and “&” as a symbol.

Here is my configuration:

"beacon": {
"lat": ...,
"lng": ...,
"table": "R",
"symbol": "&",
"comment": "PyMultimonAPRS iGate",
"status": {
"text": "Raspberry PI - RX Igate",
"file": false
},

APRS Messages am Beispiel der Hamburger Umgebung

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In diesem Artikel werde ich versuchen, mir ein paar APRS Nachrichten etwas genauer anzugucken, mit dem Ziel, die APRS-Infrastruktur in Hamburg und Umgebung zu analysieren. Dazu nutze ich ein 2m Handfunkgerät, welches ich über einen Bluetooth TNC mit dem Laptop verbinde und die Daten mit der Software Xastir (http://xastir.org) anzeigen zu lassen.
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