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Has anybody ever done the above? I can get at the discriminator tap, of a suitable radio, to obtain the audio. I am wondering if anyone has firmware to program either a PIC or AVR to decode into NMEA-HS (38,400 baud).
I'm not sure if this will help but all the NMEA data seems to be in this format NMEA. So I assume if you use any controller with a USART on board this would receive the data, which you could then decode as required. There is also a lot of code examples available on the web - what language are you hoping to use?