Re: [ferret_users] Re: FFTA

[saurabh rathore <rohitsrb2020@xxxxxxxxx>]

No worries

On Tue, Jun 5, 2018, 7:37 PM Yadidya Badarvada <israeljedidiah@xxxxxxxxx> wrote:

Thanks a lot. 

Regards,

Yadidya.B

On Tue, Jun 5, 2018 at 5:36 AM saurabh rathore <rohitsrb2020@xxxxxxxxx> wrote:

Dear Yadidya,

Fast Fourier Transform i.e. ffta yields the same unit of the variable as it is the amplitude of the variable for various frequencies. so on y-axis it is celcius to best of my knowledge. But if you make it square i.e. [ffts[var]]^2 then it became Intensity.

you can check this link as well

https://stackoverflow.com/questions/1523814/units-of-a-fourier-transform-fft-when-doing-spectral-analysis-of-a-signal

regards, saurabh

On Mon, Jun 4, 2018 at 9:32 PM, Yadidya Badarvada <israeljedidiah@xxxxxxxxx> wrote:

Dear Ferreters,

What are the units of y-axis when the function "ffta" is used?

If I'm using the time-series data of temperature, then is it "(celcius)^2" or "(Celcius*sec) ?

Regards,

Yadidya.B

--

REGARDS

Saurabh Rathore

Research Scholar (PhD.)

Centre For Oceans, Rivers, Atmosphere & Land Science Technology

Indian Institute Of Technology, Kharagpur

contact :- 91- 8345984434