SDA Tranche 1 Tracking Layer E

Overview

Destination: Polar Orbit
Mission: Government/Top Secret

Polar Orbit Space Launch Complex 3E Vandenberg SFB, CA, USA

Tranche 1 Tracking Layer E is one of five missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Tracking Layer constellation, which will provide global indications, warning, tracking, and targeting of advanced missile threats, including hypersonic missile systems.

Updates

Cosmic_Penguin • Oct. 25, 2026, 4:56 a.m.

Launch vehicle swap with SDA Tranche 1 Tracking Layer D.



Vulcan

Family:
Configuration: Vulcan

Vulcan

See Details
Specifications
  • Stages
    2
  • Length
    ―
  • Diameter
    5.4 m
  • Fairing Diameter
    5.4 m
  • Launch Mass
    ―
  • Thrust
    ―
Family
  • Name
    Vulcan
  • Family
    ―
  • Variant
    Vulcan
  • Alias
    ―
  • Full Name
    Vulcan
Payload Capacity
  • Launch Cost
    ―
  • Low Earth Orbit
    ―
  • Geostationary Transfer Orbit
    ―
  • Direct Geostationary
    ―
  • Sun-Synchronous Capacity
    ―

United Launch Alliance

United Launch Alliance

(ULA)

CEO: Mark Peller Founded: 2006 Successes: 175 Failures: 0 Pending: 72

Agency Type:

United Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.

INFO WIKI

Vandenberg SFB, CA, USA

Space Launch Complex 3E


Falcon 9
Success
1 day, 1 hour ago
Starlink Group 15-16
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Long March 8A
Success
3 days, 6 hours ago
SatNet LEO Group 28
Commercial LC-1 - Wenchang Space Launch Site, People's Republic of China

A batch of 9 Low Earth Orbit communication satellites for the Chinese state owned SatNet constellation operated by the China Satellite Network Group.…


Falcon 9
Success
4 days, 10 hours ago
Starlink Group 15-15
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Long March 4B
Success
4 days, 13 hours ago
Yaogan 53-07 to 09/56-19 to 21
Launch Area 94 (SLS-2 / 603) - Jiuquan Satellite Launch Center, People's Republic of China

6 Chinese military “remote sensing” satellite of unknown purposes.


Long March 6A
Success
4 days, 22 hours ago
Yaogan 50-03
Launch Complex 9A - Taiyuan Satellite Launch Center, People's Republic of China

The Yaogan 50-03 is a Chinese military “remote sensing” satellite of unknown purposes.


Electron
Success
5 days, 1 hour ago
We're Not Hawking Around (3x HawkEye 360)
Rocket Lab Launch Complex 1A - Rocket Lab Launch Complex 1, Mahia Peninsula, New Zealand

HawkEye 360 is a a space-based civil global intelligence satellite network using radio frequency (RF) technology to help monitor transportation acros…


Ceres-1S
Success
1 week ago
Xiguang-4 01
Rizhao offshore launch location - Haiyang Oriental Spaceport

0.5 meter resolution Earth observation satellite for the city of Guangzhou government and Guangzhou University with multi-spectral imaging capability…


Falcon 9
Success
1 week ago
Bandwagon 5 (Dedicated Mid-Inclination Rideshare)
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

Dedicated rideshare flight to a mid-inclination orbit with dozens of small microsatellites and nanosatellites for commercial and government customers…


H3-24
Success
1 week, 1 day ago
Martian Moons eXploration (MMX)
Yoshinobu Launch Complex LP-2 - Tanegashima Space Center, Japan

MMX is a Japanese scientific mission to land on Phobos, one of the two moons of Mars, to collect samples before bringing them back to Earth. The m…


Falcon 9
Success
1 week, 5 days ago
USSF-481
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bu…