Editing ISRO (section)

=== 1990s ===
The arrival of the PSLV in 1990s was a major boost for the Indian space programme. With the exception of its first flight in 1994 and two partial failures later, the PSLV had a streak of more than 50 successful flights. The PSLV enabled India to launch all of its [[low Earth orbit]] satellites, small payloads to GTO and hundreds of [[List of foreign satellites launched by India|foreign satellites]].<ref name="gsp-pslv-1">{{cite web |title=PSLV (1) |url=http://space.skyrocket.de/doc_lau_det/pslv_1.htm |publisher=Gunter's Space Page |access-date=16 March 2021 |archive-date=5 December 2020 |archive-url=https://web.archive.org/web/20201205170455/https://space.skyrocket.de/doc_lau_det/pslv_1.htm |url-status=live}}</ref> Along with the PSLV flights, development of a new rocket, a [[Geosynchronous Satellite Launch Vehicle]] (GSLV) was going on. India tried to obtain upper-stage cryogenic engines from Russia's [[Glavkosmos]] but was blocked by the US from doing so. As a result, [[KVD-1]] engines were imported from Russia under a new agreement which had limited success<ref name=flGSLVQuest>{{cite news |last=Subramanian |first=T S |title=The GSLV Quest |url=http://www.frontline.in/navigation/?type=static&page=flonnet&rdurl=fl1806/18060820.htm |access-date=16 March 2021 |newspaper=Frontline |date=17–31 March 2001 |archive-date=1 April 2014 |archive-url=https://web.archive.org/web/20140401030910/http://www.frontline.in/navigation/?type=static&page=flonnet&rdurl=fl1806%2F18060820.htm |url-status=live}}</ref> and a project to develop indigenous cryogenic technology was launched in 1994, taking two decades to reach fulfillment.<ref name=GSLVGopalRaj>{{cite news |last=Raj |first=N Gopal |title=The long road to cryogenic technology |url=http://www.thehindu.com/opinion/lead/the-long-road-to-cryogenic-technology/article397441.ece |access-date=12 December 2013 |newspaper=The Hindu |date=21 April 2011 |location=Chennai, India |archive-date=21 June 2014 |archive-url=https://web.archive.org/web/20140621064359/http://www.thehindu.com/opinion/lead/the-long-road-to-cryogenic-technology/article397441.ece |url-status=live}}</ref> A new agreement was signed with Russia for seven KVD-1 cryogenic stages and a ground mock-up stage with no technology transfer, instead of five cryogenic stages along with the technology and design in the earlier agreement.<ref>{{cite news |last=Subramanian |first=T S |title=The cryogenic quest |url=http://www.frontline.in/static/html/fl1809/18090140.htm |access-date=13 December 2013 |newspaper=Frontline |date=28 April – 11 May 2001 |archive-date=13 December 2013 |archive-url=https://web.archive.org/web/20131213054718/http://www.frontline.in/static/html/fl1809/18090140.htm |url-status=live}}</ref> These engines were used for the initial flights and were named GSLV Mk.1.<ref>{{cite web |title=Why ISRO's New Engine and Mk III Rocket Are Reasons to Forget 1990 Cryogenic Scandal |url=https://thewire.in/138915/cryogenic-ce-20-isro-gslv-mk-iii/ |website=The Wire |access-date=10 February 2018 |archive-date=11 February 2018 |archive-url=https://web.archive.org/web/20180211192523/https://thewire.in/138915/cryogenic-ce-20-isro-gslv-mk-iii/ |url-status=live}}</ref> ISRO was under US government sanctions between 6 May 1992 to 6 May 1994.<ref>{{Cite web |date=20 April 2021 |title=Master Sanctions Chart – State Department |url=https://www.state.gov/wp-content/uploads/2021/04/MASTER-Sanctions-chart-April-2021.pdf |url-status=live |archive-url=https://web.archive.org/web/20210504170258/https://www.state.gov/wp-content/uploads/2021/04/MASTER-Sanctions-chart-April-2021.pdf |archive-date=4 May 2021 |access-date=4 May 2021}}</ref> After the United States refused to help India with [[Global Positioning System]] (GPS) technology during the [[Kargil war]], ISRO was prompted to develop its own satellite navigation system [[Indian Regional Navigation Satellite System|IRNSS]] (now NaVIC i.e. Navigation with Indian Constellation) which it is now expanding further.<ref>{{Cite news |url=http://timesofindia.indiatimes.com/home/science/How-Kargil-spurred-India-to-design-own-GPS/articleshow/33254691.cms |title=How Kargil spurred India to design own GPS |last=Srivastava |first=Ishan |date=5 April 2014 |access-date=9 December 2014 |work=[[The Times of India]] |archive-date=15 December 2016 |archive-url=https://web.archive.org/web/20161215183718/http://timesofindia.indiatimes.com/home/science/How-Kargil-spurred-India-to-design-own-GPS/articleshow/33254691.cms |url-status=live}}</ref>