Editing Geosynchronous Satellite Launch Vehicle (section)

=== GSLV Mark I ===
The first developmental flight of GSLV Mark I had a 129 tonne (S125) first stage and was capable of launching around 1500&nbsp;kg into [[geostationary transfer orbit]]. The second developmental flight replaced the S125 stage with S139. It used the same solid motor with 138 tonne propellant loading. The chamber pressure in all liquid engines were enhanced, enabling a higher propellant mass and burn time. These improvements allowed GSLV to carry an additional 300&nbsp;kg of payload.<ref name="cursci-25jul01">{{cite journal|author1=R. V. Perumal|author2=B. N. Suresh|author3=D. Narayana Moorthi|author4=G. Madhavan Nair |title=First developmental flight of geosynchronous satellite launch vehicle (GSLV-D1)|journal=Current Science|date=25 July 2001|volume=81|issue=2|pages=167–174 |url=http://www.iisc.ernet.in/currsci/jul252001/167.pdf|archive-url=https://web.archive.org/web/20160305012149/http://www.iisc.ernet.in/currsci/jul252001/167.pdf|archive-date=5 March 2016}}</ref><ref name="cursci-10sep03">{{cite journal|author1=R. V. Perumal|author2=D. Narayana Moorthi|author3=N. Vedachalam|author4=G. Madhavan Nair|title=Second developmental flight of Geosynchronous Satellite Launch Vehicle |journal=Current Science|date=10 September 2003|volume=85|issue=5|pages=597–601|url=http://www.iisc.ernet.in/~currsci/sep102003/597.pdf|archive-url=https://web.archive.org/web/20180216164833/http://www.iisc.ernet.in/~currsci/sep102003/597.pdf|archive-date=16 February 2018}}</ref> The fourth operational flight of GSLV Mark I, GSLV-F06, had a longer third stage called the C15 with 15 tonne propellant loading and also employed a {{No break|4 meter}} diameter payload fairing.<ref name=GSLVF06>{{cite web|title=GSLV-F06|url=http://www.isro.gov.in/gslv-f06/gslv-f06.aspx|publisher=ISRO|access-date=9 January 2014|url-status=dead |archive-url=https://web.archive.org/web/20130810005704/http://isro.gov.in/gslv-f06/gslv-f06.aspx|archive-date=August 10, 2013}}</ref><ref>{{Cite web|title=GSLV-F06 / GSAT-5P mission brochure|url=http://isro.gov.in/gslv-f06/pdf/GSLV-F06.pdf|url-status=live|archive-url=https://web.archive.org/web/20130909115830/http://isro.gov.in/gslv-f06/pdf/GSLV-F06.pdf|archive-date=9 September 2013}}</ref>

[[File:Launch of GSLV F11 GSAT-7A from Second Launch Pad of SDSC SHAR 01.jpg|thumb|upright=1.0|left|Launch of GSLV F11 [[GSAT-7A]] from Second Launch Pad of [[Satish Dhawan Space Centre]]]]