Zero filling

{
  "id": "MLC-T-CHM-012798",
  "term": "Zero filling",
  "field": "Chemistry",
  "definition": "A processing step in Fourier transform spectroscopy in which zeros are appended to a free induction decay or interferogram before the transform, which decreases the frequency or wavenumber spacing between points of the spectrum. It interpolates the spectrum and gives smoother, better-defined line shapes without adding information or improving true resolution. Padding to twice the original data length is a common choice.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "free induction decay",
    "interferogram",
    "wavenumber in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 679 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/zero-filling/"
}