Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s2.t77.5

v2.c12.s2.t77.5

If a description of the observatories built by Jayasiṃha, and of the observations taken, and the items of original information gleaned from these, be attempted, it would take a small volume. It is enough to state here, however, that Jayasiṃha ensured a higher degree of accuracy in the calculation of planetary positions and motions than that achieved in Europe in those days. This reflects great credit on him as well as this country. The length of the year adopted in this work is tropical and the rate of annual precession about 51″.4. The planetary places obtained from the work appear to be sāyana. We are instructed to take the nirayana places obtained by applying the ayanāṃśa-correction. The numbers of revolutions and other elements also appear to have been given as in the Sūrya Siddhānta along with corrections to be applied to them.