Solar noon
All the measures must be synchronized at local solar noon
Toutes les mesures doivent être synchronisées au midi solaire local.
Aim: Identify the shortest shadow and its direction towards the north (northern hemisphere) Observation Record the position of the shadow during the day Production Gif animated, slideshow or timelapse video | Objectif: Identifier l'ombre la plus courte et sa direction vers le nord (hémisphère nord) Observation Enregistrer la position de l'ombre pendant la journée Production Gif animé, diaporama ou vidéo image par image (timelapse) |
It is interesting to locate solar noon on the day of the equinox, because the end of the shadow traces a straight line during this day.
Eratosthenes ephemeride : any location - registered cities
NOAA Solar Calculator - ephemeride.xlsx