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Space Development Agency's First Tranche 1 Mission

SpaceX Falcon 9 on Wednesday, September 10 launched the Space Development Agency’s (SDA) first Tranche 1 mission to low-Earth orbit from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California. If needed, a backup opportunity is available on Thursday, September 11 at 7:04 a.m. PT.

This will be the sixth flight for the first stage booster supporting this mission, which previously launched five Starlink missions. Following stage separation, the first stage will land on the Of Course I Still Love You droneship, which will be stationed in the Pacific Ocean.

The space vehicles launched during this mission will serve a part of SDA’s Proliferated Warfighter Space Architecture (SDA's प्रोलिफेरेटेड वारफाइटर स्पेस आर्किटेक्चर), a new layered network of satellites in low-Earth orbit and supporting elements that will provide global military tactical communication and missile warning, indication, and tracking capabilities.


Falcon 9 is a reusable, two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of people and payloads into Earth orbit and beyond. Falcon 9 is the world’s first orbital class reusable rocket. Reusability allows SpaceX to refly the most expensive parts of the rocket, which in turn drives down the cost of space access.

Falcon 9’s first stage incorporates nine Merlin engines and aluminum-lithium alloy tanks containing liquid oxygen and rocket-grade kerosene (RP-1) propellant.
Falcon 9 generates more than 1.7 million pounds of thrust at sea level.

The Falcon 9 first stage is equipped with four landing legs made of state-of-the-art carbon fiber with aluminum honeycomb. Placed symmetrically around the base of the rocket, they are stowed at the base of the vehicle and deploy just prior to landing.

The interstage is a composite structure that connects the first and second stages, and houses the pneumatic pushers that allow the first and second stage to separate during flight.

Falcon 9 is equipped with four hypersonic grid fins positioned at the base of the interstage. They orient the rocket during reentry by moving the center of pressure.

The second stage, powered by a single Merlin Vacuum Engine, delivers Falcon 9’s payload to the desired orbit. The second stage engine ignites a few seconds after stage separation, and can be restarted multiple times to place multiple payloads into different orbits.

Made of a carbon composite material, the fairing protects satellites on their way to orbit. The fairing is jettisoned approximately 3 minutes into flight, and SpaceX continues to recover fairings for reuse on future missions.

SpaceX Mission Updates: https://www.spacex.com/launches
NASA Mission Updates: https://www.nasa.gov/news/recently-pu...

NASA's Mars perseverance rover updates:
https://science.nasa.gov/mission/mars...

NASA's Mars curiosity rover updates:
https://science.nasa.gov/mission/msl-...

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