Quadrature spectrum

{
  "id": "MLC-T-MET-008234",
  "term": "Quadrature spectrum",
  "field": "Meteorology and atmospheric science",
  "definition": "A component of the cross-spectrum between two time series, representing the covariance of one series with the Hilbert transform of the other. It quantifies the out-of-phase relationship between two signals at different frequencies. In atmospheric science, it is used in spectral analysis to understand phase differences between atmospheric variables, such as temperature and pressure oscillations.",
  "url": "https://mlchart.com/terminology/meteorology/quadrature-spectrum/"
}