How to Convert one Set of Spherical Coordinates to Another?
How to convert one spherical coordinate system to another? What are the rotation matrices, and how to use them?
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Notes, analyses and observations
Working notes, real-chart analyses and observations from research practice — without hasty conclusions or astrology jargon for its own sake.
Fundamentals of Trigonometry for Practicing Astrologers
What do sine and cosine mean, where do they come from, and how are coordinates of the celestial point relate to them
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Regiomontanus System Explained
What is the circle of position, mundane position, and conjunction with the cusp in the Regiomontanus house system?
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Placidus House System Explained
What is the curve of planetary position, mundane position, and conjunction with the cusp in the Placidus house system?
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