Category: Telecommunications

Telecommunications: Propagation, HF, VHF, UHF, uWave

RTL-SDR for Satellite Weather-Meteor M2-3/4

Introduction Recently I received a notice that NOAA15/18/19 transmissions were coming to an end (Ref.1). Over the past several years I have enjoyed monitoring these transmissions (Ref.2). However from reading various Newsgroups, it appeared that satellite weather was still available on the Meteor satellite family M2-3 & M2-4 (Ref.3). So I set about trying to… Continue reading RTL-SDR for Satellite Weather-Meteor M2-3/4

NanoVNA for 137MHz Satellite Weather BPF+LNA Testing

Introduction In a previous post I tested a 433MHz BPF + LNA for its frequency response or S21 (Ref.1). In this post I will test a 137MHz BPF + LNA for the satellite weather band. Recently the NOAA15/18/19 satellites were decommissioned, so I wanted to know if my existing BPF/LNA could accommodate other weather satellites.… Continue reading NanoVNA for 137MHz Satellite Weather BPF+LNA Testing

AIS & GNSS on OpenCPN

Introduction In previous posts (Ref.1/3) I looked at using a new GNSS receiver with AIS on various combinations of Win10/RPi4/OpenStreetMap/OpenCPN. In this post I look at GNSS on full receive 921600bps with AIScatcher. Equipment Block Diagram Figure 1 shows the receive block diagram. To receive all 4 satellite constellations you have to have the maximum… Continue reading AIS & GNSS on OpenCPN