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ACT — Advanced Component Technology Program

Created: 2026-04-05 (session 11)

Summary

ACT (Advanced Component Technology) is a Science Mission Directorate / Earth Science Division instrument component maturation program. It is not an STMD program — this distinguishes it from SBIR/STTR, NIAC, GCD, and FO. ACT funds component and subsystem development for Earth science remote sensing instruments, bridging laboratory proof-of-concept to flight-ready components for Decadal Survey missions.

66 projects total (all Completed as of data snapshot 2026-04-04). All projects funded to TRL 2-5 range, targeting Earth observation from space.

Portfolio Structure

TX breakdown

TX Count % What it contains
TX08: Sensors & Instruments 54 81.8% Remote sensing components (detectors, lasers, antennas, spectrometers)
TX04: Sensing & Perception 7 10.6% Sensing electronics, photonic chips, ML-integrated sensors
TX05: Comm/Nav 4 6.1% Antenna components (SAR, reflectometry, GNSS)
TX12: Mechanical Systems 1 1.5% Deployable antenna structure

Note: TX04 in ACT context ≠ Robotics. These are sensing/electronics subsystems that don't fit neatly into TX08 — hybrid photonic receivers, on-chip imagers, radar-on-chip.

Funding rounds (by start date)

  • 2008-2012 (~12 projects): First-generation; lasers for CO₂/methane lidar, detector FPAs, early microwave receivers
  • 2012-2016 (~14 projects): Decadal Survey 2007 follow-up; SAR antennas (NISAR class), 2µm lasers for 3-D Winds, immersion gratings
  • 2018-2022 (~18 projects): Decadal Survey 2017 follow-up; HgCdTe APDs, W-band photonic receivers, metamaterial spectrometers, PIC lidar
  • 2021-2026 (~22 projects): Most recent cohort; quantum sensors, advanced PICs, ML-integrated sensors, metasurface antennas

Technology Clusters

Lidar/Laser Components (largest cluster)

~18 projects focused on space lidar for atmospheric measurement (CO₂, CH₄, H₂O, aerosol, wind): - 2µm pulsed solid-state lasers (multiple projects: 10479, 10482, 10472, 10478) - Photon-counting detector subsystems (94347) - Integrated micro-photonics for lidar (IMPRESS: 94342, UC Santa Barbara — PIC lidar at TRL 4) - Combined HSRL+wind lidar (10472, LaRC) - MIT laser transmitter for water vapor lidar (94337, TRL 2→3)

Context: NASA needs space-borne lidar for ASCENDS (CO₂ column), 3-D Winds (global wind profiles), and ACE (Aerosol/Cloud/Ecosystems) — all Decadal Survey missions. ACT is directly funding the laser/detector components these missions require.

Microwave/Radar Components (~12 projects)

W-band, submillimeter-wave, Ka-band components for cloud/precipitation radar: - 167-174.8 GHz TWT amplifier (96940, Northrop Grumman, TRL 2→4): 100W amplifier for planetary boundary layer differential absorption radar - W-band RF-photonics receiver (96946, Caltech, TRL 2→4): photonic-based W-band receiver for cloud radars - Ultra-Wideband Photonic Spectrometer (96938, Phase Sensitive Innovations, TRL 2→6): highest TRL in recent cohort; PBL atmospheric sensing - Metasurface antennas for W-band beam steering (94338, JPL, TRL 3→4) - Multi-frequency metasurface antennas for mm-wave radar (157504, JPL, TRL 2→?) - 3-D Lightning geolocation CubeSat (96928, TRIAD/LANL, TRL 2→4)

Key achievement: TRL 6 for the ultra-wideband photonic spectrometer (96938) is the highest maturity in the 2021-2025 cohort — it's approaching flight-ready component status within ACT.

Detector/Focal Plane Arrays (~10 projects)

  • HgCdTe APD FPAs for single-photon lidar: 10480 (TRL 2→5), 96924 SAPHIRA arrays (GSFC, TRL 2→4)
  • BETA-APD: antimonide superlattice APDs for lidar (96944, Ohio State, TRL 2→4)
  • VLWIR FPAs for Earth science (94344, Caltech, TRL 2→4)
  • Metamaterial hyperspectral sensor (94346, Phoebus Optoelectronics, TRL 2→4)
  • GRIFEX 3U CubeSat ROIC verification (11004, TRL 2→7 — flown in space, highest TRL in portfolio)

GRIFEX is notable: a 3U CubeSat that flew a readout integrated circuit (ROIC) for GEO-CAPE class instruments. Reached TRL 7 (space-demonstrated component). This is one of the few ACT projects that went all the way to space demonstration.

Photonic Integration (emerging, 2021-2026 cohort)

  • Earth-observing PIC (145041, Lockheed Martin, TRL 2→4): photonic integrated circuit imaging spectrometer
  • HOT-BIRD + IR waveguides (145047, Northrop Grumman + JPL, TRL 2→3): heterogeneous integration of IR detectors with photonic chips
  • Hyperspectral PIC for GeoCARB (96942, UC Davis, TRL 3→4): PIC hyperspectral imager for CO₂/CH₄ column
  • Ultra RF (145048, Northrop Grumman, TRL 2→4): ultra-wideband RF photonics spectrometer for PBL sensing

Trend: The 2023 cohort shows a clear pivot to photonic integration — combining detector material advances with on-chip photonic processing. This is consistent with the broader push toward SWaP reduction for SmallSat instruments.

Quantum Sensors (4 projects, 2021-2026 cohort)

See also: topics/cold-atom-quantum-sensing.md

Project Lead Technology TRL
145042 (Vescent) Industry Modular laser architecture for cold-atom sensors and atomic clocks 2→4
145043 (Yale) Academia Integrated acousto-optics for atom interferometry 2→4
145049 (ColdQuanta) Industry Rydberg atom microwave radiometer 2→4
145041 (Lockheed) Industry PIC spectrometer (overlaps with quantum sensing instrumentation) 2→4

ACT as quantum sensor feeder: The 4 quantum sensor projects are all in the most recent (2023-2026) cohort. ACT is funding the component layer of cold-atom sensors — laser systems, acousto-optic modulators — while AIGG (GSFC GCD) funds the full instrument integration. The AIGG TRL 4 stall (see cold-atom page) is partly a supply-side problem — ACT components like Vescent's laser (145042) are meant to supply the modular parts AIGG needs.

ML/AI-Integrated Components (1 project)

  • SMARTIE (96945, Irvine Sensors, TRL 2→4): Stacked, radiation-tolerant ML compute chip stack. Designed to bring neural network inference capability to space instruments. Uses 3D chip stacking for density, radiation hardening for space survival.
  • ML-driven MWIR sensor (145046, UT Austin, TRL 1→4): Mid-wave IR FPA with integrated ML inference for real-time data reduction.

Note: ACT's ML integration is purely hardware (inference on chip), not algorithmic. This is the supply side of the TX11 AI/ML gap — ACT makes radiation-hard ML chips; whether missions will use them is the demand-side question.

TRL Outcomes

TRL progression across the 66-project portfolio: - Typical path: TRL 2 → TRL 4 (majority of projects) - High achievers: TRL 5+ for mature technologies (lidar components, SAR antennas, submm-wave receivers) - TRL 6: Ultra-Wideband Photonic Spectrometer (96938) — approaching flight-ready - TRL 7: GRIFEX (11004) — space-demonstrated ROIC

All projects show Completed status — no currently Active ACT projects in TechPort as of April 2026. This may indicate a funding gap between cohorts, or that the most recent 2023-cohort projects have ended their TechPort reporting period.

Program Context

Why ACT matters for this KB: ACT is the Earth Science equivalent of CIF — it provides component-level funding for SMD Decadal Survey mission development. The comparison reveals a structural asymmetry: - STMD programs (SBIR, GCD, FO) fund technology for space access and in-space capabilities - SMD programs (ACT, IIP, PICASSO) fund technology for Earth observation science missions

ACT components flow up to IIP (Instrument Incubator Program) for full instrument integration, and then to the actual Decadal Survey missions (NISAR, PACE, SWOT, ACE, 3-D Winds). This is a different technology pipeline than STMD's mission-enabling technology pipeline.

Funding agency: NASA Earth Science Division (ESD), Science Mission Directorate. Not STMD. This means ACT projects don't appear in STMD portfolio counts — they're in a separate directorate.

Representative Projects by Target Mission

Target mission Projects
NISAR-class SAR 34758, 10477, 17500
ACE (Aerosol/Cloud/Ecosystems) 17478, 96940, 96946
3-D Winds / GEDI follow-on 10479, 10472, 94347
ASCENDS (CO₂ column) 10473, 10482, 10478
GPM/TEMPEST follow-on 96926, 17499
SWOT (ocean topography) 10468
GeoCARB / GOES follow-on 94341, 96942
Future cold-atom gravity mission 145042, 145043, 117119