Introduction In a previous post I looked at receiving both AIS & ADS-B and displaying them on OpenCPN using a combination of aisdeco2 & MULTIPSK (Ref.1). The immediate application for this is for an off shore oil/exploration rig, where knowledge of local ships is important (AIS), as well as incoming/outgoing helicopters that land on the… Continue reading RTL-SDR for AIS & ADS-B on SDRangel Local Map
Category: Electronics
Electronics: Hardware, Simulation Software, Microcontrollers
RTL-SDR for AIS on SDRangel & OpenCPN
Introduction AIS Automatic Identification System for Ships is a traffic system that uses VHF transponders on vessels to periodically send out location information. AIS uses two VHF marine channels 87B (161.975 MHz) and 88B (162.025 MHz). Transmission is by 9.6Kbps GMSK modulation (Ref.1). AIS uses navigational information from external on board GPS, Inertial Navigation and Ship Control… Continue reading RTL-SDR for AIS on SDRangel & OpenCPN
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 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
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. 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
VOR VHF Omni-Directional Range – Splat! Path Analysis_a
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