Altitude sundials for seasonal and equal hours
Abstract:Altitude sundials do not require knowledge of the N-S direction to quantify time in terms of either seasonal or equal hours. Methods for determining the corresponding dial patterns are reviewed, and accurately computed data for a latitude of 51°N presented as horizontal, vertical, rectangular, and pillar dials on both timekeeping systems.
Document Type: Research Article
Affiliations: Astronomy Group, University of Leicester, Leicester, LE1 7RH, UK
Publication date: January 1, 1996