Keywords: Tycho Brahe's mural quadrant in Uranienborg.png of the instrument Engraving from the book Tycho Brahe 1598 Astronomiae instauratae mechanica Wandsbeck Found in the article http //www historicalgeophysics ax/sp/18 pdf A Study of Tycho Breahe's Astronomical Latitude Determination of Uranienborg using Satellite Positioning and Deflections of the Vertical by Martin Ekman and Jonas Ågren Small Publications in Historical Geophysics No 18 ~ 1598 author File Mauerquadrant jpg 3 134 × 4 600 pixels File Tycho-Brahe-Mural-Quadrant jpg 1 499 × 2 024 pixels File Fotothek df tg 0005682 Astronomie Vermessung Messinstrument jpg 558 × 820 pixels PD-old-100 Uraniborg Quadrants instrument 16th-century engravings Tycho Brahe Astronomiae instauratae mechanica |