An Ouranos Sky Chart is an image made up with a collage of photos of the sky taken every hour. It is an automated process where equipment takes a photo of the sky, and automatically generates an image. Each image gives you information on cloud cover and light conditions. Below is an example of an Ouranos Sky chart.
Each day is represented by 24 images, lined up in a row across the image.
Each seperate days' photos are displayed line by line below each other.
If you want to create your own Ouranos Sky Chart, we have a complete article on how you can setup your own station using a Raspberry Pi Here.