Introduction In previous posts we looked at receiving weather information via HFWEFAX (Ref.1) and GRIB files (Ref.2) over an internet connection. In the next several posts, we will examine receiving weather information directly from a geostationary satellite GOES16(R) and see if it is suitable in a marine application for solo/family blue water sailors. My thanks… Continue reading RTL-SDR for Satellite Weather on GOES16 – Planning
Category: Telecommunications
Telecommunications: Propagation, HF, VHF, UHF, uWave
RTL-SDR for Satellite GPS on OpenCPN
Introduction In the previous post we looked at how to receive GPS spread spectrum signals using an RTL_SDR V3 with a patch antenna (Ref.1, Ref.2). In this post we will see how to send the RTKNAVI data to OpenCPN so that we can plot our position on a nautical chart. RTKNAVI Output Stream Setup Figure… Continue reading RTL-SDR for Satellite GPS on OpenCPN
RTL-SDR for Satellite GPS
Introduction The GPS Global Positioning System first came on line in 1993 with a constellation of 24 satellites (Ref.1). GPS receivers are ubiquitous now, but it is instructive to see if we can examine the actual GPS signal. I will use an active GPS patch antenna with an RTL-SDR V3 receiver. GPS satellites follow a… Continue reading RTL-SDR for Satellite GPS
HF Receiver Testing – Zero IF Direct Conversion_b
Introduction In the previous post (Ref.1) I examined the signal flow through the RPiZonia Zero IF Direct Conversion Receiver by examining the Block & Level testing diagram. Figure 1 shows the schematic diagram. Figure 2 shows the Block & Level testing diagram. Reception SW Station 11.930MHz In order to receive a shortwave station on 11.930MHz,… Continue reading HF Receiver Testing – Zero IF Direct Conversion_b
HF Receiver Testing – Zero IF Direct Conversion_a
Introduction Several years ago I developed a Zero IF Direct Conversion HF receiver (Ref.1) to be used as a lab component of my HF Telecommunications course (Ref.2). The idea was to learn HF theory by Scicos simulation, electronic circuit design (schematic capture, pcb design, LTspice simulation, working with smd) and testing with a scope and… Continue reading HF Receiver Testing – Zero IF Direct Conversion_a