Category: Electronics

Introduction In previous posts I examined using GNU Radio to receive various signals such as VOR, VHF Air Band, SSB, AM, WBFM, AIS and ADS-B (Ref.1). I also examined how these signals could be simulated using Scicos (Ref.2). In many cases for testing purposes, we need to capture a sample of the signal in question… Continue reading RTL-SDR for RF Signal Capture in GNU Radio

Introduction Recently I started to experiment receiving satellite weather from NOAA15/18/19 (Ref.1/2). I decided to see if I could do the same thing with the Raspberry Pi4, since this would add yet another functionality to a compact and efficient platform (Ref.3). Tracking Software For tracking, we can use Predict developed by John Magliacane KD2BD (Developer… Continue reading RTL-SDR for NOAA Satellite Weather on RaspberryPi4

Introduction In the previous post I examined the reception of NOAA15/18/19 Low Earth Orbiting satellites for weather information (Ref.1). These satellites use the APT Automatic Picture Transmission format to send signals (Ref.2&3). APT is a mixture of analog and digital transmission, and it reminds me of my early career working on FM microwave links carrying… Continue reading APT – Automatic Picture Transmission for NOAA Satellites – Scicos/Gnurc Simulation

Introduction Weather information is absolutely critical for any marine passage especially for blue water sailors. In previous posts I looked at receiving weather information from the NOAA GOES16 geostationary satellite (Ref.1), from Marine HF Weather Fax (Ref.2) and GRIB Files using OpenPlotter (Ref.3). In this post we will examine reception of weather information from the… Continue reading RTL-SDR for NOAA15/18/19 Satellite Weather on SDRangel

Introduction In the previous two posts I looked at using the RTL-SDR for receiving AIS & ADS-B (Ref.1) on the same local map as well as AIS alone on OpenCPN (Ref.2) using SDRangel (Ref.3). Due to the flexible nature of SDRangel, it is possible to have multiple channel modules within the RTL-SDR sampling bandwidth. So… Continue reading RTL-SDR for AIS & Marine Weather on SDRangel & OpenCPN