Calibration Steps in Skyglow Experiment
Posted: Wed Oct 26, 2011 2:06 am
What is the reason for the calibration steps in this experiment? - https://www.sciencebuddies.org/science- ... p022.shtml
From what I can gather from the experiment, the calibration step is to give you a range for comparison. As the experiment says:
You can use the relative information to compare skyglow in different directions and different places with your reference. If you want to know the actual light levels, you'll have to further calibrate your camera per the article.The gray scale calibration covered in this project established the dynamic range for your digital camera. However, you still don't know where that dynamic range falls in terms of absolute light levels. The Sky & Telescope article by Tony Flanders describes a method for calibrating the camera using photographs of stars of known magnitudes (Flanders, 2006).
Keith