iCSC: Clear Sky Chart Viewer

Choosing when and where to observe is hard. iCSC: Clear Sky Chart Viewer makes it easier by letting you search for the best observing locations using Clear Sky Charts published by Attilla Danko. The Clear Sky Chart shows, for the next 48 hours, when you might expect clear and dark skies at a specific site. With over 4600 charts for North America and data from Allan Rahill of the Canadian Meteorological Centre, you’ll know what to expect before you step outside. These charts include Cloud Cover, Transparency, Seeing, Darkness, Wind, Humidity, and Temperature, and a legend helps you read them quickly.

iCSC lets you find charts by title, location or map and save your frequently used charts for quick access. While Clear Sky Charts are targeted at astronomers, anyone curious about the night sky or in need of an accurate sky forecast can benefit from this app on iPhone.