These graphs show the autoguider error while the autoguide process is running and an image is being exposed. CCD Commander does not plot the error while the autoguider is being setup, or while dithering. These plots will show the guide error that occurs only while your images are being exposed.
The Save button allows the data to be saved in a comma delimited text format for evaluation or preservation of the data.
The Clear button will clear the graphs.
These graphs are a very useful tool to check that your imaging session did not have any severe autoguider problems.