Sundial: The sundial is any straight vertical object which makes 90 degrees angle with the ground, e.g. Street's Lamp Posts.
G.N.Time: The time when the Sundial marks Geographical North. It is also know as noon time.
S.D. Shadow: The time when the Sundial Shadow points to Qiblah.
Opposite S.D. Shadow: The time when the Opposite of the Sundial Shadow points to Qiblah.
SD Shadow 90 degree: The time when the Sundial Shadow makes a 90 degree angle with the Qiblah.
*: The Sundial or the opposite does not point to Qiblah on that date.