We are lucky the Turks destroyed Ujjain only in 1233 CE
If he had died in their attack, science would have suffered a terrible blow. Even Madhava may not have invented calculus without the foundation laid by him.
He attempted to improve the table to the 3rd minute-achieved by his distant successor Madhava
And he discovered the so called Newton-Gauss interpolation(2nd order)
At the passing of every Ghatika(24 mins) or half a muhurta as notified from the Yantravalayam, the soldiery were trained to ring a series of bells(kootu) all over Mahodayapuram to inform the public of the correct time.
Mahodayapuram was captured & burnt down by the Cholas under Rajendra Chola in the first half of the 11th century.
By the end of that century, Rama Varma shifted the capital to Kollam
Cultural foundations by CKR
Encyclopaedia of the History of Science, Technology & Medicine by H Selin
History of Kerala school of Hindu Astronomy by K.V Sharma
Kerala state Gazetteer Vol II by K. R Nair
Historical geography of Valluvanad by R Varier