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BEGIN:VEVENT
SUMMARY:Falcon 9 B5 • PWSA 71–91
DTSTART;VALUE=DATE-TIME:20260716T202200Z
DTEND;VALUE=DATE-TIME:20260716T202200Z
UID:293865959733
DESCRIPTION:A SpaceX Falcon 9 Block 5 rocket will launch 21 operational s
 atellites for the U.S. military’s Space Development Agency PWSA (Prolife
 rated Warfighter Space Architecture) constellation. The Tranche 1 satellit
 es (codenamed Praetorian) on this flight are for the Transport Layer and w
 ere built by York Space. The mission is designated as SDA-T1TL-E and the F
 alcon 9 booster is B1103.4 for this flight. The 2nd stage is equipped with
  a Mission Extension Kit. Comprising a gray band on the RP-1 tank\, extra 
 helium bottles & batteries\, this kit extends the life of the stage in-orb
 it\, allowing it to deploy the payload directly into its operational orbit
 .\n-\nOnce fully operational\, the SDA Transport Layer will consist of a p
 roliferated heterogeneous constellation of data relay space vehicles (SVs)
  that provide persistent global coverage through a mesh network comprised 
 of communication satellites that connect to one another and to other space
  vehicles and ground stations via optical intersatellite links (OISLs). By
  nature of the mesh network spanning the globe\, the Transport satellites 
 will also be able to transmit precise position\, navigation and timing (PN
 T) data to enhance GPS. A-class satellites have at least four optical cros
 s-links\, that is so they can talk to satellites that are in plane with on
 e another as they're traveling and they also can talk to satellites that a
 re cross-plane or in completely different orbits. So they can maintain tho
 se four lines of communication simultaneously. The B-class satellites will
  connect directly to the warfighters via the Link-16 military communicatio
 ns system. They have two optical cross-links each\, so that allows them to
  maintain constant communication with the other transport satellites in pl
 ane. The two other nodes will be Link-16 transmitters. Link-16 is an exist
 ing tactical communication system used across the services primarily for a
 ir and ground systems to share low latency data. The first phase of SDA’
 s Proliferated Warfighter Space Architecture consists of 28 satellites (Tr
 anche 0 including 20 communications payloads made by Lockheed Martin and Y
 ork Space\, and eight missile-tracking infrared sensor satellites made by 
 SpaceX and Leidos) as a proof of concept for the missile tracking and data
  relay network\, followed by more than 150 additional satellites to provid
 e an initial operational capability. In total\, Tranche 1 will consist of 
 154 operational satellites: 126 in the transport layer developed by York\,
  Northrop Grumman\, and Lockheed Martin\, and 28 focused on missile warnin
 g and tracking developed by Northrop Grumman and L3Harris. Combining conve
 ntional tactical radio links\, laser inter-satellite communications\, and 
 wide-view infrared sensors\, hundreds more SDA spacecraft could launch lat
 er as the Pentagon ramps up efforts and integrates new capabilities.\n-\nD
 elayed from Q1 2024\, Q2\, Q4 2025 and Q1.\n\nWebcast:\nhttps://www.spacex
 .com/launches\nhttps://spaceflightnow.com
LOCATION:Vandenberg AFB Space Launch Complex 4\, Lompoc\, Kalifornien 9343
 6\, USA
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