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Dead End: SPEC Inc. — PPS Phase II (125420) — No Phase III Expected

Filed: 2026-04-08 (session 99)

What Looked Like Signal

SPEC Inc.'s Particle Phase Spectrometer Phase I (113090) showed TRL 7 in TechPort — an unusually high endpoint for a 6-month SBIR Phase I. The Phase II [125420] was funded at TRL 5–8 range. The combination of a promising TRL record and a clear operational application (cloud microphysics discrimination of water vs. ice in mixed-phase clouds) suggested a successful maturation story worth reading.

What I Found

Phase I TRL 7 was an artifact. The Phase II started at TRL 5, not TRL 8. The Phase I record inherited a higher TRL value, likely from Phase II closeout data or a data entry error. Actual Phase I endpoint was TRL 4–5.

Phase II produced zero TRL advancement. Project [125420] ran 3 years (May 2022 – May 2025) with TRL starting and ending at 5. The project promised a flight-ready prototype for the ARCSIX Arctic field campaign (summer 2024) and identified the NASA P-3B research aircraft as the target platform.

What was actually completed: The 2D-Gray optical array probe component was validated on a lab bench (TRL 5 = component validated in relevant environment, consistent with final TRL). Realtime 2D-Gray data dated April 2024 showed 195-µm particle images at 5-µm resolution. But the full integrated PPS — three subsystems packaged into an airborne housing — was never assembled and flight-qualified. ARCSIX launched without the PPS.

Closeout: May 2025 — no Phase III funded, no follow-on in TechPort.

Why It's a Dead End

  • No continuation in TechPort. Closed_Out with zero TRL advancement and no follow-on project records.
  • No Phase III. The SBIR pipeline from SPEC for this technology ends here.
  • Authoritative analysis in content page. Full investigation — documents read, Handix comparison, ARCSIX context — is filed in topics/larc-airborne-measurement-program.md.

Lesson

TRL 7 on a 6-month Phase I is a reliable indicator of a data artifact, not a genuine milestone. The typical Phase I endpoint for a new instrument concept is TRL 3–4. Any Phase I record showing TRL 6–7 warrants checking the Phase II starting TRL before concluding the technology succeeded.