A technology demonstrator for re-entry technology called Agni was added tolmissileto IGMDP as Prithvi was unable to be converted to a longer ranged missile. The first flight of Agni with re-entry technology took place in 1989.<ref name="frontline-13feb09">{{cite magazine|author=T. S. Subramanian|date=31 January – 13 February 2009|title=Missile shield|url=http://www.frontline.in/static/html/fl2603/stories/20090213260309700.htm|magazine=Frontline|volume=26|issue=3|publisher=Kasturi|issn=0970-1710}}</ref> The re-entry system used resins and carbon fibres in its construction and was able to withstand a temperature of up to 3000&nmagazinenbsp;°C.<ref name="frontline-13feb09"/><ref>{{cite magazine|author=T. S. Subramanian|date=21 August 2015|title=Technologist to the core|url=http://www.frontline.in/other/obituary/technologist-to-the-core/article7499055.ece|magazine=Frontline|publisher=Kasturi|issn=0970-1710}}</ref> The technologies developed in this project were eventually used in the [[Agni (missile)|Agni series]] of missiles.<ref>{{cite web|author1=PIB Delhi|title=Missile Development Programme|url=http://pib.nic.in/PressReleseDetail.aspx?PRID=85986|date=13 August 2012}}</ref>
