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4th Space Launch Squadron

4th Space Launch Squadron
4th Space Launch Squadron
4th Space Launch Squadron
Photo By: Vandenberg Graphic
VIRIN: 180830-F-XX999-500

The 4th Space Launch Squadron (4 SLS) is part of the 30th Space Wing (30 SW), within the 30th Operations Group (30 OG). The squadron is located at Vandenberg AFB, CA, and is the Air Force's Evolved Expendable Launch Vehicle (EELV) launch squadron for the West Coast.
 

Mission: Execute integrated launch operations providing safe, secure, sustainable, and assured access to space.

Vision: Recognized launch experts leading spacelift operations to support the joint warfighter and national command authority.

Core Competencies: Mission Assurance, Mission Integration, Launch Infrastructure, and Launch Operations

 

Heritage: From activation on 15 April 1994 through its inactivation on 29 June 1998, the 4 SLS was assigned to the 30th Operations Group and supported the launch of Titan IV and Titan II rockets. Following the final VAFB Titan launch, on 29 June 1998 the squadron was deactivated. On 1 December 2003, the squadron was reactivated to support the launch of EELV Delta IV rockets and assigned to the 30th Launch Group. Later the squadron supported the launch of the new EELV Atlas V rocket. Due to the 30th Launch Group deactivation, effective 21 July 2018, the 4 SLS was reassigned to the 30th Operations Group to continue supporting the Delta IV and Atlas V rockets.

 

Launch Background: The EELV program was initiated in order to develop affordable and reliable alternatives to older, obsolete, and expensive heavy-lift launch vehicles, such as the Titan IV. The 4 SLS has launched a multitude of satellites for various customers, such as:

  •  Government meteorological and weather satellite: Defense Meteorological Satellite Program (DMSP)

  •  Government reconnaissance satellites: National Reconnaissance Office (NRO) missions

  •  Commercial imagery satellites: Landsat Data Continuity Mission (LDCM) and WorldView missions

  •  Civilian interplanetary satellite: NASA’s Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission

 

4 SLS Launch History:

  • Launch Date Launch Designation (Launch Vehicle)

  • 05 Dec 1995 NRO K-15 Titan IV

  • 12 May 1996 NRO K-22 Titan IV

  • 20 Dec 1996 NRO K-13 Titan IV

  • 04 Apr 1997 DMSP-14 Titan II

  • 23 Oct 1997 NRO K-18 Titan IV

  • 27 Jun 2006 NROL-22 Delta IV Medium+ (4,2)

  • 04 Nov 2006 DMSP-17 Delta IV Medium

  • 13 Mar 2008 NROL-28 Atlas V 411

  • 19 Oct 2009 DMSP-18 Atlas V 401

  • 20 Sep 2010 NROL-41 Atlas V 501

  • 20 Jan 2011 NROL-49 Delta IV Heavy

  • 15 Apr 2011 NROL-34 Atlas V 411

  • 03 Apr 2012 NROL-25 Delta IV Medium+ (5,2)

  • 13 Sep 2012 NROL-36 Atlas V 401

  • 11 Feb 2013 LDCM Atlas V 401

  • 28 Aug 2013 NROL-65 Delta IV Heavy

  • 06 Dec 2013 NROL-39 Atlas V 501

  • 03 Apr 2014 DMSP-19 Atlas V 401

  • 13 Aug 2014 WorldView-3 Atlas V 401

  • 12 Dec 2014 NROL-35 Atlas V 541

  • 08 Oct 2015 NROL-55 Atlas V 401

  • 10 Feb 2016 NROL-45 Delta IV Medium+ (5,2)

  • 11 Nov 2016 WorldView-4 Atlas V 401

  • 01 Mar 2017 NROL-79 Atlas V 401

  • 23 Sep 2017 NROL-42 Atlas V 541

  • 12 Jan 2018 NROL-47 Delta IV Medium+ (5,2)

  • 05 May 2018 InSight Atlas V 401

 

Mascot: Phoenix

Motto: “Supra Summus” (Over the Top)