Introduction
In recent posts I have been looking at using my new GNSS receiver on various maps such as OpenStreetMap, OpenCPN and operating systems such as Windows & RaspberryPi (Ref.1/6). Since the icebergs and polar bears have left Toronto Harbour, I thought it would be fun to do a spring fix with GNSS and AIScatcher.
Equipment Block Diagram
Figure 1 shows the equipment block diagram. The GNSS receiver is connected to OpenCPN by a serial Nema0183 link at 921600bps. AIS CH87B/88B is received on the RTL-SDR connected to OpenCPN by a network UDP localhost port 10110. In order to use AIScatcher for AIS reception, the appropriate Windows binary is downloaded as a zip file. When unzipped, you can see an .exe file and also a start.bat file as in Figure 2. The .bat file adds the various options to the .exe in this case sending the output to a network connection for OpenCPN as in Figure 3. Figure 4 shows the GNSS application receiving all 4 navigational constellations.
Toronto Harbour Test
Figure 5 shows the Red Boat position and AIS contacts received in the Toronto Harbour area.
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References
#1. – “GNSS & AIScatcher on RaspberryPi4”
https://jeremyclark.ca/wp/telecom/gnss-aiscatcher-on-raspberrypi4/
#2. – “GNSS & AIScatcher on OpenCPN”
https://jeremyclark.ca/wp/telecom/gnss-aiscatcher-on-opencpn/
#3. – “Propagation Testing with GNSS on OpenStreetMap”
https://jeremyclark.ca/wp/telecom/propagation-testing-with-gnss-on-openstreetmap/
#4. – “GNSS on OpenStreetMap”
https://jeremyclark.ca/wp/telecom/gnss-on-openstreetmap/
#5. – “GNSS Receiver”
https://jeremyclark.ca/wp/telecom/gnss-receiver/
#6. – “GPS/GNSS Receiver Testing”
https://jeremyclark.ca/wp/telecom/gps-gnss-receiver-testing/
