Editing Titan (rocket family) (section)

===Titan 23G===
{{Main|Titan 23G}}
Starting in the late 1980s, some of the deactivated Titan IIs were converted into space [[launch vehicle]]s to be used for launching U.S. Government payloads. 
Titan 23G rockets consisted of two stages burning [[liquid rocket propellant|liquid propellant]]. The first stage was powered by one [[Aerojet]] [[LR87]] engine with two combustion chambers and nozzles, and the second stage was propelled by an [[LR91]]. On some flights, the spacecraft included a kick motor, usually the [[Star (rocket stage)|Star-37XFP-ISS]]; however, the [[Star (rocket stage)|Star-37S]] was also used.<ref name="GSP"/>

Thirteen were launched from [[Vandenberg Space Launch Complex 4|Space Launch Complex 4W]] (SLC-4W) at [[Vandenberg Air Force Base]] starting in 1988.<ref name="GSP">{{cite web|url=http://space.skyrocket.de/doc_lau/titan-2.htm|title=Titan-2|last=Krebs|first=Gunter|publisher=Gunter's Space Page |access-date=2009-04-29}}</ref> The final such vehicle launched a [[Defense Meteorological Satellite Program]] (DMSP) weather satellite on 18 October 2003.<ref>{{cite web |
url = http://spaceflightnow.com/titan/g9/031018launch.html |
title = U.S. weather satellite finally escapes grasp of hard luck |
work = spaceflightnow.com |
author = Ray, Justin |
date = October 18, 2003 |
access-date = 2009-10-18
}}</ref>