Re: [Discuss-gnuradio] Doppler detection

2017-08-24 Thread Marcus Müller
Dear Andrew, Hm, this is all getting confusing; an uncommented screenshot doesn't help. Why would you want to pull the doppler shifted signal from a plot (which is a reduced representation of your signal), if you have access to the original signal? Also, you're still very much only describing in,

Re: [Discuss-gnuradio] Doppler detection

2017-08-23 Thread jmfriedt
I am also unable to understand what you aim (or problem) is but if it can be of any use to you, a small movie of 24 hour of GRAVES radar recording is available at http://jmfriedt.free.fr/1707_graves_36h.ogg Horizontal axis is Doppler shift in Hz (df=2*v/c*143.05 MHz, or a velocity of 750 km/h for

Re: [Discuss-gnuradio] Doppler detection

2017-08-23 Thread Andrew Rich
Ok like the primary radar I have spent 7 years working on How do I pull out doppler shifted signal from a waterfall spectrum The doppler shift is slow though Not a chirp but a slow 5 minute chirp Andrew Sent from my iPhone > On 23 Aug 2017, at 8:05 pm, Marcus Müller wrote: > > So, adapt

Re: [Discuss-gnuradio] Doppler detection

2017-08-23 Thread Chris Kuethe
That's why I said "inspirational". Being familiar with what others have done with regard to doppler estimation and correction might help you reuse some parts of their work. Another module that might help is gr-inspector - https://github.com/gnuradio/gr-inspector. Perhaps you can use this to analy

Re: [Discuss-gnuradio] Doppler detection

2017-08-23 Thread Marcus Müller
So, adapt the scale with which you look at things. I think your question could actually use a lot of "describe the problem that you're actually having". The point is that you don't really seem to understand how you'd "pull the doppler signals" out of a combination of signals. Now, we all love

Re: [Discuss-gnuradio] Doppler detection

2017-08-22 Thread Andrew Rich
Sorry you misunderstood my question I want the doppler shift of the satellites to be very distinct from the station with no doppler shift Much like doppler shift radar perhaps But the change in frequency can be minutes long for the satellite pass Andrew > On 23 Aug 2017, at 3:26 pm, Chr

Re: [Discuss-gnuradio] Doppler detection

2017-08-22 Thread Chris Kuethe
https://github.com/wnagele/gr-gpredict-doppler https://github.com/daniestevez/doppler might be helpful or at least inspirational. On Tue, Aug 22, 2017 at 9:58 PM, Andrew Rich wrote: > Sorry this is new to me > > I have just worked out I can see satellites in a waterfall display due to > their d

[Discuss-gnuradio] Doppler detection

2017-08-22 Thread Andrew Rich
Sorry this is new to me I have just worked out I can see satellites in a waterfall display due to their doppler shift I think that lends itself to meteor shower Can gnu radio be used to assist pulling out the doppler signals from the non doppler ones ? I guess this would require some sort of