Category: Navigation

Introduction VOR VHF Omni-Directional Range is an aircraft navigational system developed just before WWII and implemented after the war. It operates in the VHF band from 108.0 – 118MHz. In my previous two posts I looked at receiving a local DVOR signal at my home QTH, then using various on line references, I simulated the… Continue reading VOR VHF Omni-Directional Range – GNU Radio Decoder

Introduction VOR VHF Omni-Directional Range is an aircraft navigational system developed just before WWII and implemented after the war. It operates in the VHF band from 108.0 – 118MHz. In the previous post (Ref.1) I described my attempts at receiving a local VOR signal. The near field VOR receive spectrum is shown in Figure 1.… Continue reading VOR VHF Omni-Directional Range – Scicos Simulation

Introduction VOR VHF Omni-Directional Range is an aircraft navigational system developed just before WWII and implemented after the war. It operates in the VHF band from 108.0 – 118MHz (Ref.1). It is gradually being replaced by newer GNSS systems. Nevertheless, I decided that it would be an interesting experiment to receive VOR signals and attempt… Continue reading VOR VHF Omni-Directional Range – Splat! Path Analysis_a

Introduction In the previous post we looked at using the RTL-SDR on Raspberry Pi4 with GNU Radio and Gqrx. We examined three applications: displaying the FM band spectrum, wide-band FM reception and narrow-band Marine weather reception. In this post we look at the RTL-SDR for AM reception on GNU Radio. The latest version of GNU… Continue reading RTL-SDR for AM on GNU Radio

Introduction When I was about eight years old, I received a “Rocket Radio” for Christmas. It was about six inches high, red and looked like a small rocket. It had a sliding rod which acted as a tuning inductor for the crystal receiver inside. I spent hours listening to the various powerful AM stations, with… Continue reading RTL-SDR on Raspberry Pi4