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
Category: Navigation
Navigation: Celestial, Sextant, Equipment
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
Celestial Navigation – Artificial Horizon_a
Introduction The addition of an artificial horizon to a Marine Sextant allows measurements to be taken when you don’t have a water horizon nearby. I purchased an Artificial Bubble Horizon and adapted it to fit on my existing Sextant. The mounting slot on the Horizon was the mirror image to the slot on my Sextant,… Continue reading Celestial Navigation – Artificial Horizon_a