First flight of SSLV ends in failure: What exactly went wrong with the ISRO mission?

The maiden lift-off of the SSLV ended in failure after the two satellites — EOS-02 and AzaadiSAT — were placed in an elliptical orbit instead of a circular one, rendering them ‘no longer usable’. ISRO, has attributed the problem to a sensor issue and vowed to come back ‘soon with SSLV-D2’

from https://www.firstpost.com/explainers/first-flight-of-sslv-ends-in-failure-what-exactly-went-wrong-with-the-isro-mission-11026241.html