Undersampling

{
  "id": "MLC-T-CHM-012424",
  "term": "Undersampling",
  "field": "Chemistry",
  "definition": "The process of acquiring data at a sampling rate lower than twice the highest frequency component present in the signal, which is the Nyquist rate. This can lead to aliasing, where high-frequency components in the original signal appear as lower-frequency components in the sampled data. Undersampling can result in a loss of information and misinterpretation of the true signal characteristics.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Nyquist criterion",
    "folding",
    "electromagnetic radiation",
    "wavelength in medium",
    "wavenumber in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 677 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/undersampling/"
}