Introduction In a previous post I looked at a simple receiver for VHF Air Band AM (Ref.1). In this post I add several new features in order to select from a stored set of local frequencies and a choice between source blocks. GNU Radio Schematic VHF Air Band AM Receiver Figure 1 shows the GNURC… Continue reading RTL-SDR for VHF Air Band AM Receiver on GNU Radio
RTL-SDR for Satellite Weather – GOES16
Introduction Four years ago I was able to receive signals from GOES16, a geostationary weather satellite located at 75.2degW (Ref.1/6). I used goestools on RaspberryPi4B. In the last post I decoded signals from Meteor M2-3/4 using SatDump. I noticed that this program also handled GOES. So I setup my dish again and was able to… Continue reading RTL-SDR for Satellite Weather – GOES16
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
Celestial Navigation – Artificial Horizon_b
Introduction In a recent post I looked at adapting an artificial bubble horizon to my sextant using a 3D printed bracket. I calibrated the combination with a water horizon on Lake Ontario (Ref.1). In this post I look at taking measurements of the Moon altitude on Sept12th & Oct5th using the artificial horizon from my… Continue reading Celestial Navigation – Artificial Horizon_b
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