SDA issues DRAFT Solicitation for Tranche 2 Transport Layer- Alpha Variant Space Vehicles

Response Date: June 5, 2023

SDA issued a DRAFT solicitation for one of several types of Tranche 2 Transport Layer (T2TL) space vehicles—T2TL Alpha. This DRAFT solicitation expands upon the foundation for Tranche 2 of the Proliferated Warfighter Space Architecture (PWSA) previously described in the T2TL Beta solicitation.

SDA expects to procure approx. 100 T2TL- Alpha space vehicles, which will share certain common characteristics with the other T2TL variants (Beta and Gamma). Baseline payloads and subsystems on all T2TL satellites include:

  • Three optical communication terminals (OCTs) 
  • Ka-band mission payload 
  • Networking and data routing subsystem 
  • Navigation subsystem 
  • S-band backup telemetry, tracking, and control (TT&C) subsystem 

T2TL-Alpha space vehicles specifically will include the following additional payloads/capabilities:

  • Fourth OCT 
  • Link 16 mission payload 
  • Battle Management, Command, Control, and Communications (BMC3) module 
  • Global Navigation Satellite Systems (GNSS) Situational Awareness (SA) capability within navigation subsystem 
  • Warlock mission payload 

T2TL features multiple space vehicle and mission configuration variants procured through a multi-solicitation and multi-vendor acquisition approach.

Please review the full DRAFT solicitation for details and instructions to provide feedback. Information gathered as a result of this DRAFT solicitation may be used to inform future solicitations.

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