ms2fft

Read miniSEED data then make FFT on it.

Dependencies

• libmseed
• fftw

How to Compile and Run

First clone this repo with this command:

$ git clone --recursive https://github.com/Cuda-Chen/ms2fft.git

Then type:

$ make
$ ./ms2fft [mseedfile]

Output Format

<fs> <real> <imag>

What is the meaning of out[0]?

• http://www.fftw.org/fftw3_doc/Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs
  • The DFT results are stored in-order in the array out, with the zero-frequency (DC) component in out[0].
• Zero-frequency component
  • https://www.quora.com/What-is-a-zero-Hz-frequency-component
  • Short answer: the zero Hz component is the average of the signal in the time-domain. Also called its DC value.