Introduction In the previous post I reviewed my existing GPS receivers and took a quick look at a new GPS/GNSS receiver BU-353N5 (Ref.1). In this post I am going to look more carefully at this new GNSS receiver and its capabilities. GNSS = Global Navigation Satellite System (Ref.2). GNSS Systems Satellite Navigation System Properties GPS… Continue reading GNSS Receiver
Category: Navigation
Navigation: Celestial, Sextant, Equipment
GPS/GNSS Receiver Testing
Introduction Recently I have been looking at propagation prediction. I read a very interesting article about propagation drive testing, so I thought I would check my existing GPS units for suitability. Since I replaced my Win7 laptop with a Win10 laptop several years ago, a key thing changed. The original FTDI drivers for various devices… Continue reading GPS/GNSS Receiver Testing
VHF Marine Propagation with Radio Mobile
Introduction In a recent post I was considering a hypothetical 2m amateur radio repeater and studying its VHF coverage with a Yagi antenna (Ref.1). In the process I read an article describing the difference in results of using the Longley-Rice & ITWOM propagation models (Ref2). The researchers used the Radio Mobile program developed by Roger… Continue reading VHF Marine Propagation with Radio Mobile
Splat! – Antenna Patterns
Introduction Splat! (Ref.1) is a very versatile propagation prediction program that I discussed in several previous posts. In my first post, I looked at installation on Windows and Linux, how to obtain the digital elevation data files, create .qth & .lrp files, and run a simple point to point analysis (Ref.2). In the second and… Continue reading Splat! – Antenna Patterns
Marine GMDSS/NAVTEX MF Decoder
Introduction In previous posts I looked at various aspects of decoding BFSK GMDSS/DSC using GNURadio, SDRangel, Multipsk and Scicos. In the last post I used a BPF Non-Coherent GNURadio FSK decoder to decode random data (Ref.1). In this post I will use the same decoder to examine a short GMDSS/NAVTEX BFSK message (Ref.2). BFSK BPF… Continue reading Marine GMDSS/NAVTEX MF Decoder