Fundamental frequency

{
  "id": "MLC-T-MET-005854",
  "term": "Fundamental frequency",
  "field": "Meteorology and atmospheric science",
  "definition": "The lowest frequency at which a periodic oscillation or vibrating system repeats, also called the first harmonic. Every higher harmonic is an integer multiple of it, so a 24-hour cycle has harmonics at 12 hours, 8 hours and so on. In atmospheric science the idea underlies harmonic analysis of periodic signals such as the daily cycle of temperature or pressure.",
  "url": "https://mlchart.com/terminology/meteorology/fundamental-frequency/"
}