Introduction During the past several years I have received broadcasts from Short Wave Radiogram using the RTL-SDR and SDR-IQ receivers. These broadcasts featured transmissions using MFSK32/64 which I decoded with FLDIGI and Multipsk (Ref.1/3). These broadcasts illustrated the amazing noise performance of MFSK. Last week Short Wave Radiogram added a segment using OLIVIA 64-2000 (Ref.4).… Continue reading HF SDR-IQ for Olivia 64-2000
CubeSat CANVAS on GNURadio
Introduction This past year I was able to successfully receive CubeSats ENSO, Veronika and EIRSAT-1 (Ref.1/3). All three CubeSats have since decayed from orbit according to the SatNOGS database. Doing a search, I found a recent CubeSat launch CANVAS (Ref.4). So I thought I would try reception using my 2m/70cm yagi. I previously used an… Continue reading CubeSat CANVAS on GNURadio
Toronto Marine Weather 162.400/162.475MHz
For the last six years since I have been working steadily with my YouTube channel and blog, the presence of XMJ-225 Toronto Marine Weather radio on VHF162.4MHz has been a welcome occurrence. While studying various VHF broadcasts such as AIS and DSC, I used this station as a starting placeholder. For the first generation of… Continue reading Toronto Marine Weather 162.400/162.475MHz
CHU – Bon Voyage!
In a recent article from the SWListening Post, I learned that the long time short wave station CHU is going silent key this June 2026 (Ref.1/2). I can remember tuning in to this station many times over the years, initially on my HQ100AC in the early 1960s. Several years ago I examined propagation from CHU… Continue reading CHU – Bon Voyage!
Meteor Scatter MSK144 Channel on GNURadio
Introduction In the previous post I was able to receive MSK144 meteor scatter transmissions on 6m using the RTL-SDR (Ref.1). I thought it would be worthwhile to see how robust this protocol is using a simple GNURadio channel model. In the QEX design paper the following performance figures are given (Ref.2):SNR>0dB, almost all frames decoded… Continue reading Meteor Scatter MSK144 Channel on GNURadio