Pahse Shift as a Function of Height

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TTA
TTA on 10 Mar 2020
Commented: Ayush singhal on 21 May 2021
Hi,
In the attached file "Signal" I have three (3) columns of signals. The first column is height, second column and the third column are the two signals.
Please how can I calculate the Phase Shift between signal one (second column) and signal two (third column)as a function of height?.
The dt is 0.02 km. the data ranges from 20 to 40 km.
  1 Comment
dpb
dpb on 10 Mar 2020
Don't see anything that looks like a phase shift in those signals; maybe there's a frequency difference between the two but hard to make much of the one that seems to have other stuff going on...
Try
figure
plot(signal) % all as are
figure
plot(signal.*[1 -1 1]) % flip (:,2)
which is essentially saying there's a 180-deg phase shift.
The height variable is just a linear trend; don't see there's anything to be done with it presuming both were measured at the same height at the same time you have no way to separate anything about what its effect may have been.

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Accepted Answer

dpb
dpb on 10 Mar 2020
Well, if you already have a phase shift, that's something else entirely...carrying on from above
phasedata=importdata('Schmidt_Fluctuation1_1.txt');
plot(phasedata,linspace(min(signal(:,1)),max(signal(:,1)),size(phasedata,1)))
xlim([-6 6])
legend("1&2","1&3","2&3")
yields
which presumes the data are in the order of min:max in the second array; otherwise reverse the y vector.
  11 Comments
TTA
TTA on 11 Mar 2020
Hi,
I sincerely appreciate your effort.
Its not clear to me too thats why I asked.
I'll continue to try and hope I will get the problem solved soon.
Thanks so much for your time.
Tunde
Ayush singhal
Ayush singhal on 21 May 2021
Hello is it possible to calculate the shift in the stripe pattern.
Any lead would be helpful.

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