Spectral Power Density Estimation

To generate a periodogram for the lightcurve, use ttag_lightcurve_periodogram

Usage:
  ttag_lightcurve_periodogram [-h] [-v level] input_file output_file
                                              minf, maxf, stepf
Arguments:
  input_file  : an ASCII file with 2 columns :
                   - time (JD or MJD, Helio- or Geo-centric)
                   - countrate

  output_file : an ASCII file with 2 columns :
                   - frequency (Hz)
                   - normalized estimated power spectral density

  minf        : start frequency (Hz)
  maxf        :   end frequency (Hz)
  stepf       :  frequency step (Hz)

Options:
  -h:  this help message
  -v:  verbosity level (=1; 0 is silent)