IMG_3564

The Vrihat Samrat Yantra is a medial that can give the time to an accuracy of 2 seconds. The shadow of the triangular wall, which is placed in the North-South direction with an angle equal to the latitude of this location (27 degrees North), moves equal distances in equal time intervals, on the eastern and western side quadrants. This movement is calibrated to read the local time. The western and eastern quadrants are divided into 6 hours each, for the morning and the afternoon segments, respectively. Each hour is divided in 15 minutes and later in 1 minute parts. The minute part has ten subdivisions each of 6 seconds each of which again has three small divisions of 2
seconds each. The correction factor which is to be added for the day is displayed in the Observatory. It is used to convert the time obtained from this instrument to the clock time.