Gnomonic shadow

PAI, VENKETESWARA R.; Ramasubramanian, K.; Sriram, M. S.; Srinivas, M. D.
URI: https://link.springer.com/chapter/10.1007/978-981-10-6814-0_8
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7203
Date: 2018-03

Abstract:

The hypotenuse of the gnomon (palaśruti) is obtained by taking the square root of the sum of 144 (bhavaka) and the square of the mid-day shadow [of the gnomon] on the equinoctial day (viṣuvaddina).1 The mid-day shadow on the equinoctial day when multiplied by the radius (triguṇa) and divided by that [hypotenuse] would be the Rsine of the terrestrial latitude (akṣamaurvikā).

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