On Wed, Dec 17, 2014 at 12:01 AM, Jim Lux <jim...@earthlink.net> wrote: > On 12/16/14, 3:36 PM, Magnus Danielson wrote: > what about one of the software receivers? I would think that making L2 and > L5 filters isn't that tough, so all you need is the back end.
I'm pretty sure GNSS-SDRLIB supports L2C, you can see it working with a ~$400 bladerf http://www.rtl-sdr.com/real-time-gps-positioning-bladerf/ Though getting dual band, in phase, requires something like a $1100 USRP B210... and that that point you're getting in to the price-points where you can find surplus survey receivers and such. >From a timenuts perspective, it may be more interesting to go the SDR route, since the survey receiver is not likely to have a lot of affordances for timing applications and there is a lot of interesting things you could do in software. There have been some people talking about GNSS targeted SDRs, e.g. things with 4x in phase down mixers and backing ADCs that could simultaneously capture every current/known GNSS signal and send them down to the computer, at a reasonably low price... but I think none have moved past the prototyping phase. The nearest I'm aware that seems actually available is http://www.onetalent-gnss.com/ideas/software-defined-radio/sdrnav40 but I don't really know anything about it. (e.g. if it's real, what the software support story is, etc.) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.