N1SU APRS Digipeater & TX IGate Configuration and setup overview by Jason Buchanan

Seattle APRS frequencies

If you have a radio capable of UHF 9600 baud for APRS (Kenwood TH-D7A, TH-D72A, TH-D74A, TM-D700, TM-D710, TM-D710GA, Yaesu FTM-400XDR, VX-8... others?) put it to good use! UHF APRS is alive and well in Seattle.

New!

• N1SU APRS Dashboard with real-time packet statistics

• N1SU APRS Digipeater Packet Propagation and Analysis - work in progress / draft

• N1SU-13 APRS radiation level geiger counter data sent via RF as APRS telemetry
• APRS Seismograph project greatly exceeds expectations! A local M2.5 quake occurred and seismic data was successfully sent to APRS telemetry by RF (see lower graph shown in link)

APRS seismograph project uses a Raspberry Shake seismograph model RS1D with rsudp to report intensity of STA/LTA ratios with bandpass filtering 0.1 to 3.0 Hz.
Intensity values are not Richter or Modified Mercalli (MMI) Scale. STA/LTA algorithms calculate a ratio of the short term average of station noise to the long term average.
A disclaimer about STA/LTA earthquake detection trigger

APRS geiger counter project Inspired by S55MA Raspberry Pi project. See S55MA-10 on APRS.fi

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