WA8LMF Home Page | Main Ham Radio Page | Updated 12 Dec 2023   

Click on the buttons below to go to the various
WA8LMF  APRS mapping webservers.

These mapping displays are generated by multiple instances of UI-View32 and it's companion UI-Webserver program running on one computer.

Details below on this page.


 2 Meters VHF    ISS Satgate 



30 Meters HF

 AX.25 Packet     VARA  



60 Meters HF

 AX.25 Packet     VARA  



 Special Events Webserver 

Typically used for balloon launches, hamfests, etc. When not showing anything specific, this page shows the APRS Internet System (APRS-IS) feed for Michigan and surrounding areas, combined with off-air receive from my location in Haslett, MI.


 Traverse City Area - 2 Meters 

Expanded views of the northwestern Lower Peninsula of Michigan & Traverse City area from the APRS-IS feed. These are large high-resolution map images - larger than most browser windows. Scroll around to see all parts of the maps.


 Road Trip Tracker 



NOTE 1:  This webserver is using  TCP/IP ports14439, 14441, 14443, 14445 & 14447  rather than the customary port 80 for http .   As a result, you may not be able to access it from some corporate or government Internet connections that severely firewall or otherwise restrict access to uncommon port numbers.

NOTE 2:  Radio propagation (i.e. reception) on 30 and 60 meters HF is highly sensitive to the level of solar activity.  When the solar X-ray flux plotted on the graph below has a baseline above the first major division, or spikes upward (i.e. a solar flare), 30 meters will have very poor conditions, or black out completely, causing very few (or no stations at all) to show on the HF map.

X-ray radiation from the sun travels at the speed of light, reaching the earth in about 8 minutes.   When these intense blasts of X-rays reach the earth, they can temporarily disrupt the ionized layers of the earth's upper atmosphere (the ionosphere). These layers are responsible for reflecting long-range (beyond the horizon) HF radio signals back to earth.  The result is a weakening or even complete fade-out of HF radio signals.

Real-Time Solar Activity Monitor (Last 72 Hours)
Graph from NOAA website of solar X-Ray flux.
(Courtesy of US National Oceanic & Atmospheric Administration
 at https://services.swpc.noaa.gov/images/swx-overview-large.gif

More solar activity information.

The changing values on this display are, again, due to the
ever-changing flow of energy and charged particles from the sun.

Courtesy of Paul L Herrman  N0NBH  http://www.hamqsl.com/solar.html


We hit the rock-bottom of the roughly 11-year-long solar activity cycle at the beginning of 2020. We are now on the upswing, promising better conditions on the higher HF bands over the next several years.

The graph below shows sunspot count, which directly affects long-range (beyond the horizon) HF radio transmission here on earth.

From NOAA Spaceweather Prediction Center

Click/Tap on Graph for Current Update
(Opens new window or tab)


Still more solar activity information
presented in the style of a local TV weather forecast.


Background on the WA8LMF Webserver Setup

The WA8LMF APRS webserver produces multiple map displays.

These displays are generated by 11 copies of UIview running simultaneously on the same computer. They are served by the UI-Webserver component of five of those copies of UI-View32  The VHF, ISS "Satgate", Special Event and 60-meter instances are running in 4 separate VMware virtual machines using micro-Server2003. The HF page is running directly on the Win7-64 host. All instances are connected to APRS Internet servers using filter ports set to receive JUST my own callsigns, the ISS space station object, and the US National Weather Service feed.   All stations heard off-the-air in all instances are passed to the APRS Internet System; i.e. all instances function as igates.

The computer's internal sound system is used for EchoLink. All the APRS receive and transmit on the various bands is being handled by three separate Behringer UCA-202 USB external sound cards.

All instances of UIview are set to capture and date-time-stamp an image of their map automatically every 1 minute.

All of this, along with EchoLink, mmSSTV and EasyPal "digital" SSTV is running on an Acer E3-111-P60S 11.8" "netbook" PC dedicated to 24/7 "Ham SuperServer" duty.  (Review here)