Search found 9 matches

by bobasaurus
Mon Jul 08, 2019 8:52 pm
Forum: General
Topic: Does RSP2 work with Gnu Radio?
Replies: 10
Views: 11372

Re: Does RSP2 work with Gnu Radio?

Has anybody compiled a windows binary of gr-sdrplay? I can't find it after a lot of googling. Tried compiling it myself, but the dependencies are tricky on windows.
by bobasaurus
Tue Jul 02, 2019 7:17 pm
Forum: Code Corner
Topic: Tryin to get the sample sdr app to work
Replies: 12
Views: 4807

Re: Tryin to get the sample sdr app to work

The rsp1 has fewer lna states, only 0:3 are allowed I believe.
by bobasaurus
Tue Jul 02, 2019 6:13 pm
Forum: Code Corner
Topic: trying to reduce dc offset with low if modes, api differences
Replies: 4
Views: 1387

Re: trying to reduce dc offset with low if modes, api differences

Thanks for the information, that explains the spike in the third spectrum... the smaller bandwidth of the first two spectra wasn't large enough to show this spike. Any idea why I'm getting a narrow center spike on each one? This never shows up in commercial software, but I always see it when calcula...
by bobasaurus
Mon Jul 01, 2019 9:14 pm
Forum: Code Corner
Topic: trying to reduce dc offset with low if modes, api differences
Replies: 4
Views: 1387

Re: trying to reduce dc offset with low if modes, api differences

The SDRUno low if spectrum also has no DC spike:

Image

Again, I don't know if this is due to the DC offset being removed during the FFT pre-processing, or if there is no DC offset spike because of the low IF mode.
by bobasaurus
Mon Jul 01, 2019 8:18 pm
Forum: Code Corner
Topic: trying to reduce dc offset with low if modes, api differences
Replies: 4
Views: 1387

trying to reduce dc offset with low if modes, api differences

I'm currently developing sdrplay rsp2 code using the older version 2.13 API. I'm having some difficulties with the DC offset wiping out a narrow signal (with and without correction), so I'm trying to use low if modes to eliminate the offset. Alternatively, I could tune off from center but I'm trying...
by bobasaurus
Tue Dec 19, 2017 12:17 am
Forum: General
Topic: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde
Replies: 9
Views: 11552

Re: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde

Oh, I just found the German rs1729/RS project, looks interesting.
by bobasaurus
Tue Dec 19, 2017 12:03 am
Forum: General
Topic: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde
Replies: 9
Views: 11552

Re: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde

Thanks for the reply! I do have the open source decoding software for the LMS-6 and that gives me lat / lon / alt, but of course it would be fun to see the weather instrument telemetry as well. I've looked at the raw packets and can match up the hex bytes corresponding to all the known data, but th...
by bobasaurus
Fri Dec 08, 2017 6:41 pm
Forum: General
Topic: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde
Replies: 9
Views: 11552

Re: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde

Thank you for the very interesting post! By chance is there any similar software available to decode the LMS-6 400 MHz radiosondes? -Scott, K4KDR Montpelier, VA USA Unfortunately I don't have a way of decoding any other type of radiosonde. The Intermet sondes are open protocol, allowing anyone to w...
by bobasaurus
Mon Dec 04, 2017 6:21 pm
Forum: General
Topic: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde
Replies: 9
Views: 11552

Re: RSP2 and Weather Balloon Tracking and Data Reception - NOAA SkySonde

I'm the NOAA engineer who wrote SkySonde, thanks for the mention. Those looking to try the software can download it from here, along with several other weather balloon tools (note that SkySonde only works with Intermet iMet radiosondes and attached ozone/water instruments): https://www.esrl.noaa.gov...