# Track at Big Distances with Track-Before-Detect (TBD2)

Canonical: https://abierto.us/opportunities/darpaps2601

- Solicitation number: DARPA-PS-26-01
- Notice type: Solicitation
- Status: Closed. Deadline was December 4, 2025 at 12:00 PM EST
- Department: Department of Defense
- Agency: Defense Advanced Research Projects Agency
- Contracting office: Def Advanced Research Projects Agcy (HR0011)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC13 National Defense R&D Services; Department Of Defense - Military; Experimental Development
- First posted: October 30, 2025
- Last posted: November 26, 2025
- SAM.gov: https://sam.gov/workspace/contract/opp/7d156117a2034a8da6685b736647413f/view

## Description

**AMENDMENT 04:**

Amendment 04 includes an update to Figure 1 on Page 4, and incorporates V3 to the Q&A which adds Q&A #109. All other information remains unchanged in the Solicitation and associated Attachments.

**AMENDMENT 03:**

Amendment 3 includes a clarification to Q&A Response #13 only. All other information remains unchanged in the Solicitation and associated Attachments.

**AMENDMENT 02:**

Amendment 2 includes updates to the Solicitation and two (2) Attachments: (Attachment 1) Controlled Unclassified Information (CUI) Guide. The CUI Guide is available by request not later than November 21, 2025, by 12:00 PM ET. (Attachment 2) DARPA-PS-26-01 Questions and Answers.

**AMENDMENT 01:** The Abstract Due Date is extended to December 4, 2025, by 12:00 PM ET. The goal of the TBD2 program is to enable continuous space-based detection and tracking of objects in cislunar space on relevant timelines. This effort will increase the safety of cislunar commercial and civilian traffic for the benefit of all nations and enable a sustainable space ecosystem.

To accomplish this, TBD2 seeks to advance the state of the art for signal processing algorithms so that when combined with commercial off-the-shelf (COTS) or quasi-COTS optical sensors and/or focal plane arrays (FPAs), they can a) detect and track faint objects at gigameter (Gm) distances b) operate using available onboard processing capabilities, and c) do so on relevant timelines (within hours).

## Publications

- October 30, 2025: Solicitation, due November 20, 2025. Notice 1bc7be1d806a4ceeaad39b64ae0ae224. https://sam.gov/workspace/contract/opp/1bc7be1d806a4ceeaad39b64ae0ae224/view
- November 7, 2025: Solicitation, due December 4, 2025 at 12:00 PM EST. Notice e2c1c079112a4da898dcd23a8c56274d. https://sam.gov/workspace/contract/opp/e2c1c079112a4da898dcd23a8c56274d/view
- November 17, 2025: Solicitation, due December 4, 2025 at 12:00 PM EST. Notice 3d701c62613444f3b266564a8f65c600. https://sam.gov/workspace/contract/opp/3d701c62613444f3b266564a8f65c600/view
- November 24, 2025: Solicitation, due December 4, 2025 at 12:00 PM EST. Notice 3edbe0e5279e46cfb0d8fa6ca39bb9fc. https://sam.gov/workspace/contract/opp/3edbe0e5279e46cfb0d8fa6ca39bb9fc/view
- November 26, 2025: Solicitation, due December 4, 2025 at 12:00 PM EST. Notice 7d156117a2034a8da6685b736647413f. https://sam.gov/workspace/contract/opp/7d156117a2034a8da6685b736647413f/view

## Points of contact

- Solicitation Coordinator, DARPA-PS-26-01@darpa.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/darpaps2601.