UPDATE: The radiosonde data feeds have almost completely been moved to  sondehub.org  and the APRS-IS is no longer involved or affected by i...

TL;DR: It seems like many Baofeng radio units (UV-5R, UV-82, etc) do not work with the aprs.fi iPhone app using the BTech APRS-K1 cable. The...

Quite often someone says the aprs.fi app is starting up with the map showing Helsinki instead of the previous map view and position, and req...

The APRS packet path is used to control the distribution and retransmission of a packet in the APRS network. Every now and then someone as...

As probably most of you know by now, besides running the aprs.fi web site, I'm also one of the two main authors of the aprsc server soft...

In an effort to increase security on the web at large scale, web browser vendors and other organisations such as Google are making changes w...

Today I've set up DKIM  ( DomainKeys Identified Mail ) on the aprs.fi servers and within the aprs.fi DNS zone. A week back I already set...

Most APRS devices and applications transmit an unique AX.25 destination callsign in all their packets, so that receiving stations can figure...

I'm happy to announce that aprs .fi has tonight been directly connected to all of the APRS Tier 2 Network hubs . Two frontend servers, A...

Yesterday the aprs.fi APRS feed was slow for about an hour, between 15:00:55 and 16:11:03 UTC. One of the WXQA servers the service connects ...

This evening I've set up keepalived on the two aprs.fi front-end web servers. The program automatically manages the IP addresses of the...

Okay, I'm now officially fed up. Fed up with my own bugs caused by the complexity of the aprs.fi software. Every now and then I change s...

I've just installed my new bad GPS fix detection algorithm. It should detect bad fixes about as well as before, but produce less false p...

As a little early morning exercise I've made aprs.fi show the status message in the info balloon of the current position on the real-ti...

Quick recap: A cargo vessel called Arctic Sea (MMSI 215860000) was probably hijacked on July 24th 2009 near the eastern coast of Sweden. Th...