Ames Research Center — SST Program Home¶
Location: Moffett Field, CA (Silicon Valley) | Role: SST Program managing center SST footprint: 16 projects (14.3% of portfolio) — largest single lead org in SST
Last updated: 2026-04-14 (session 37)
Why ARC Matters¶
ARC is not just the largest SST lead org — it is the institutional home of the SST program itself, now renamed Small Spacecraft & Distributed Systems (SSDS) as of 2025. Program Director Christopher E. Baker has moved to NASA Headquarters, while Program Manager Roger Hunter remains ARC-based. ARC functions as both the program office and a performing center, which is why its project count is inflated: some projects are true ARC R&D (swarm networking, PhoneSat), while others are external company partnerships administered through ARC (the 2014 propulsion seed batch).
Key people: - Christopher E. Baker — SSDS Program Director (now at NASA HQ; appears as contact on nearly every SST project) - Roger Hunter — SSDS Program Manager (ARC, manages PTD series and Tipping Points) - David Mayer — PTD series lead (ARC, manages bus procurement and ops) - Elwood Agasid — ARC small spacecraft (PhoneSat, PyCubed, V-R3x heritage) - Caleb Adams — DSA project manager (ARC, leads Distributed Spacecraft Autonomy)
The 16 ARC-Led SST Projects¶
Swarm Networking Arc (3 projects — the institutional capability story)¶
| Project | Dates | TRL | What Happened |
|---|---|---|---|
| 10941 EDSN | 2012–2016 | 5→7 | 8-CubeSat swarm. Lost in Super Strypi launch failure (Nov 2015). |
| 91369 Nodes | 2014–2016 | 5→7 | 2 CubeSats built from EDSN spares. First inter-satellite relay in SST. Flew successfully. |
| 155368 OSE-SAT | 2022–2025 | 3→7 | Distributed Spacecraft Autonomy (DSA) Docker-on-orbit architecture. Flew on ARC spacecraft. |
The swarm arc continues beyond ARC-led projects: - V-R3x (106824): 3-CubeSat radio ranging (ARC, PACE initiative, flew on Transporter-2 June 2021) - Starling (106822): 4-CubeSat MANET swarm (BCT-led, but ARC designed/operated autonomy software)
Full arc: EDSN (8 sats, lost) → Nodes (2 EDSN spares, relay) → V-R3x (3 sats, ranging) → Starling (4 sats, full mesh + autonomy) → Starling 1.5 (STM with SpaceX) → OSE-SAT (Docker autonomy on orbit). A 12-year institutional thread (2012–2025) surviving launch failure and personnel changes. This is Archetype #8: Institutional Capability Builder.
Starling DSA results (Aug 2023–May 2024): Five historic firsts — (1) first fully distributed autonomous operation of multiple spacecraft, (2) first space-to-space autonomous status sharing, (3) first distributed reactive operations, (4) first general-purpose automated reasoning onboard spacecraft, (5) first distributed automated planning onboard multiple spacecraft. The swarm independently conducted ionosphere research without pre-programmed science directives. Scalability study demonstrated feasibility up to 60 spacecraft in simulated lunar orbit (~100 tests). Confidence: confirmed (NASA press release, Feb 2025).
Starling 1.5 STM achievement: NASA partnered with SpaceX to test autonomous space traffic coordination. Starling CubeSats used SpaceX's Starlink screening service to detect a conjunction, accepted responsibility for maneuvering, and autonomously planned and executed an avoidance maneuver resolving a close approach with a Starlink satellite — the first automated conjunction avoidance between different operators. The U.S. Office of Space Commerce participated in validating SpaceX's screening service. This extends the swarm arc from science demos into operational space traffic coordination. Confidence: confirmed (NASA ARC press release).
Note: EDSN's Super Strypi failure (Nov 2015) would have killed most programs. ARC turned the loss into Nodes by using EDSN spare hardware — demonstrating institutional resilience. The 2-sat Nodes mission was less ambitious but validated the core relay concept. Every subsequent swarm mission built on lessons from EDSN/Nodes.
PhoneSat + PACE (2 projects — COTS philosophy)¶
| Project | Dates | TRL | What Happened |
|---|---|---|---|
| 11020 PhoneSat | 2011–2014 | 5→7 | COTS smartphone as CubeSat computer. Flew April 2013 (Antares maiden voyage). |
| 106799 PACE | 2021–2023 | 4→8 | Payload Accelerator for CubeSat Endeavors. PACE-1 flew on Transporter-2 (June 2021). |
PhoneSat legacy: PhoneSat was SST's proof that COTS electronics could work in space. The philosophy — use commercial hardware, accept higher risk, iterate fast — became foundational to ARC's approach. PhoneSat's Nexus S board evolved into PyCubed (open-source CubeSat computer used in V-R3x and other missions).
PACE initiative: Linked SST and Flight Opportunities to create a rapid testing pipeline. V-R3x was a PACE project. PACE-1 flew a multi-payload 3U CubeSat to LEO.
2014 Propulsion Seed Batch (5 projects)¶
In 2014, SST funded a batch of small propulsion technology maturation projects, all administered through ARC. Four involved external companies; one was ARC internal:
| Project | Company | Technology | TRL | Downstream |
|---|---|---|---|---|
| 106807 | Busek Co. | Iodine RF ion thruster | 2→3 | → BIT-3 flew Artemis 1 |
| 106808 | Busek Co. | 1U green monopropellant | 3→4 | → BGT product line |
| 106809 | Aerojet Rocketdyne | MPS-120 3D printed hydrazine | 3→6 | Listed commercially, no confirmed flight |
| 106804 | MSNW (Slough) | ICE electromagnetic thruster | 2→3 | No visible outcome |
| 106815 | ARC (DeSain) | Advanced hybrid (N2O) | 2→5 | No visible outcome |
Hit rate: 2 of 5 (Busek×2). The two Busek seeds (~$200K each) produced the highest-leverage outcomes in the entire SST portfolio: BIT-3 flying on Artemis 1 CubeSats and the BGT green propellant product line. See Busek.
The 2014 batch reveals SST's portfolio approach: fund 5 propulsion concepts cheaply, expect 1-2 to succeed. ARC administered the batch as a coherent experiment.
Solar Sail (1 project)¶
| Project | Dates | TRL | What Happened |
|---|---|---|---|
| 95595 ACS3 | 2018–2025 | 6→7 | Advanced Composite Solar Sail. Deployed Aug 2024 (NanoAvionics bus, Rocket Lab launch). |
ACS3 is the most visually striking SST mission — an 80m² composite boom solar sail deployed in LEO. Launched Apr 23, 2024 (Rocket Lab Electron). Sail deployed Aug 24, 2024. One boom slightly bent during deployment, but mission continues. The composite boom technology comes from LaRC; ARC operated the mission on a NanoAvionics bus. Extended mission goal: orbit-raising and lowering using only solar pressure. Visible to the naked eye from Earth. ACS3 demonstrates a different ARC role: mission operator for another center's technology. Confidence: confirmed (NASA ACS3 mission page, Planetary Society).
R&D Infrastructure (1 project)¶
| Project | Dates | TRL | What Happened |
|---|---|---|---|
| 106805 Rapid Reaction Demo | 2019–2020 | 2→5 | Initiative to rapidly de-risk emerging tech via suborbital/orbital demos. Linked to PACE. |
Early/Miscellaneous (4 projects)¶
| Project | Dates | TRL | What Happened |
|---|---|---|---|
| 4879 Nanosat Reentry | 2011–2012 | 3→4 | Feasibility study for nanosat recovery. No follow-on. |
| 10939 F-4 Air Launch | 2011–2014 | 2→2 | F-4 WIPCC supersonic CubeSat launch. TRL stuck at 2. Closed out. |
| 10936 Alpha/Betavoltaic | 2011–2012 | 3→4 | Radioisotope power feasibility study with GRC. No follow-on. |
| 91601 Laser Beam Amp | 2013–2016 | 3→5 | Modulating retro-reflector optical comms. No visible downstream. |
ARC's Three Roles in SST¶
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Program office: ARC hosts SSDS (formerly SST) Program Manager Roger Hunter. Program Director Baker has moved to NASA HQ. ARC manages the PTD bus procurement (via Tyvak/Terran Orbital), Tipping Point awards, and SSPICY program.
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Performing center: ARC builds and operates its own missions (PhoneSat, EDSN, Nodes, V-R3x, Starling, PACE, OSE-SAT, ACS3). The swarm networking capability is ARC's signature contribution. DUPLEX (CU Aerospace dual propulsion CubeSat) deployed from ISS Dec 2, 2025 under ARC/SSDS oversight — 2-year orbital test of fiber-fed pulsed plasma + monofilament vaporization propulsion.
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Technology portfolio manager: ARC administers external company partnerships (Busek, Aerojet, MSNW propulsion seeds). ARC's lead-org status on these projects reflects program management, not R&D.
This dual role (program office + performing center) explains the high project count. Other centers have SST projects but don't manage the program.
Program evolution note (2025): The SST→SSDS rename reflects the program's expanding scope from individual small spacecraft to distributed systems (swarms, constellations, autonomous coordination). The Starling DSA results and Starling 1.5 STM work are direct evidence of this strategic shift. The LASSO DARPA partnership and SSPICY servicing mission further extend the scope into multi-spacecraft operations.
Outcome Summary¶
| Category | Projects | Examples |
|---|---|---|
| Flew | 7 | PhoneSat, Nodes, PACE-1, V-R3x*, ACS3, EDSN (lost), OSE-SAT |
| Commercialized | 2 | Busek BIT-3 + BGT (seeds only) |
| No visible outcome | 5 | ICE, hybrid, laser amp, nanosat reentry, alpha/beta power |
| Transitioned | 1 | Rapid Reaction Demo (fed PACE) |
| Unknown | 1 | MPS-120 (listed commercially, no flight) |
*V-R3x not in the 16 ARC-led projects but is an ARC mission under PACE.
ARC success rate: 9 of 16 projects (56%) produced visible downstream impact — substantially above the portfolio average of 54%. The swarm networking arc is the strongest institutional capability thread in SST. The Starling DSA 5-firsts achievement and Starling 1.5 autonomous conjunction avoidance with SpaceX Starlink represent the program's highest-profile operational outcomes to date.
Connections¶
- Tyvak / Terran Orbital: Bus provider for PTD series, managed by ARC (see Tyvak/TO)
- Blue Canyon Technologies: Built Starling spacecraft, operated by ARC (see BCT)
- Busek Co.: 2014 propulsion seed grants via ARC (see Busek)
- CU Aerospace: DUPLEX managed by ARC (see CU Aerospace)
- NanoAvionics: Provided ACS3 bus
- LaRC: Composite boom technology for ACS3
- GRC: Partner on alpha/betavoltaic and other thermal/power projects
Assessment¶
Role: SSDS (formerly SST) Program home + performing center Signature contribution: Swarm networking capability (12-year arc, 6 missions, survived launch failure, culminating in autonomous conjunction avoidance with SpaceX Starlink) Archetype: #8 Institutional Capability Builder — the primary exemplar Portfolio approach: The 2014 propulsion batch shows ARC as a deliberate technology portfolio manager: fund 5 concepts cheaply, expect 1-2 hits (Busek delivered both) 2024–2025 highlights: ACS3 solar sail deployed (Aug 2024), Starling DSA 5 historic firsts, Starling 1.5 STM with SpaceX, DUPLEX ISS deploy (Dec 2025), R5-S7 proximity ops demo launched (Nov 2025)