Perhaps this helps. A few years ago I needed to test GPS receivers inside a building. I used a GPS repeater to bring the satellite signal indoors. It worked very well and was easy to setup. Just Google “GPS signal repeater”
Jay. > On Jul 9, 2020, at 1:59 PM, John Akin <ja...@asset-intertech.com> wrote: > > I am working on a project that involves a GPS receiver and I need a GPS > generating device to produce test data. I thought the HackRF One sounded > perfect for the job. > > I have gone through the tutorial videos on Great Scott Gadget’s site and > implemented the FM radio project, so I believe that I have verified my HackRF > is definitely working as an FM receiver. Now I am seeking guidance in the > transmitting of GPS. > > I found several tutorial videos on line that make it look easy enough and, > following their examples, I have been using the HackRF transfer command to > transmit the GPS signal (the command syntax I have used is, “hackrf_transfer > -t .\gpssim.bin -f 1575420000 -s 2600000 -a 1 -x 0 -C 2 -R.”) > > I see the Transmit LED is on, as I would expect, but I am not having luck in > verifying the transfers are occurring using apps for either Android phones, > or iPhones. The GPS location reported by these aps is my physical location > no matter what coordinates I supply. > > I have also connected, via SMA cable, the HackRF to my project and the GPS > receiver does not appear to be receiving GPS coordinates either. The GPS > sentences it reports contain no latitude or longitude values. > > Anyone have any recommendations? > > Thanks! > > _______________________________________________ > HackRF-dev mailing list > HackRF-dev@greatscottgadgets.com <mailto:HackRF-dev@greatscottgadgets.com> > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > <https://pairlist9.pair.net/mailman/listinfo/hackrf-dev>
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