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Johnson Space Center — SST Institutional Page

JSC led 6 SST projects (5.4% of portfolio), second only to ARC (16). Its institutional role was human-spaceflight-adjacent R&D — capabilities that serve crewed exploration (rendezvous & docking, EDL, rapid prototyping) applied to CubeSat scale. JSC's most distinctive contribution to SST is people: two JSC engineers (Glenn Lightsey, John Christian) moved to Georgia Tech and became major figures in CubeSat GN&C and autonomy, carrying SST-matured knowledge with them.

Last updated: 2026-04-14 (session 26 — R5 sub-mission series documented)

SST Projects

Project ID Period TRL PI Outcome
R5 — rapid low-cost 6U CubeSat 155354 2022–2025 5→5 Sam Pedrotty (PM) flew (Firefly Alpha, July 2024)
Stellar Exploration Qual Testing 106831 2020–2023 TRL 8 Ali Guarneros Luna commercialized (see Stellar Exploration)
MEMS IMU Swarms 91474 2013–2014 3→5 John Christian transitioned (Christian → GA Tech)
Transparent CubeSat Antennas 91379 2013–2016 3→5 David Jackson transitioned (IEEE publication)
CubeSat AR&D Software 91360 2013–2016 3→4 Glenn Lightsey no visible outcome (but people chain)
Maraia Earth Return Capsule 91493 2013–2015 4→4 Alan Strahan no visible outcome

Success rate: 1 flew (17%), 1 commercialized, 2 transitioned. 67% had some downstream impact when including people chains.

R5: Rapid-Reaction CubeSat Development

"Realizing Rapid, Reduced-cost high-Risk Research" — JSC's philosophy distilled into a mission name. R5 aimed to build and operate spacecraft platforms fast and cheap enough to demonstrate payloads on short timelines. Each spacecraft features incremental improvements over the previous; the bus is designed to host a variety of payloads.

PM: Sam Pedrotty (sam.pedrotty@nasa.gov). Program contacts: Christopher Baker (Program Director), Roger Hunter (Program Manager, also DiskSat PI).

R5 Sub-Mission Series

Spacecraft Config Launch Vehicle Status Key Technology Notes
R5-S1 3U Feb 10, 2022 Astra Rocket-3.3 (ELaNa 41) Lost (launch failure) Cameras, computers, algorithms for EVA inspection Astra tumbled at stage separation. No payload data.
R5-S2 6U Jul 3, 2024 Firefly Alpha FLTA005 (ELaNa 43) Flew Cold gas N₂ RCS, COTS avionics baseline, Iridium SBD comms Late addition — filled mass simulator slot. 6 discharge cycles, 20+ hrs ops.
R5-S4 6U Jul 3, 2024 Firefly Alpha FLTA005 (ELaNa 43) Flew Cold gas N₂ RCS, LANL ELROI "license plate", fiducial tags First R5s with propulsion. 3 discharge cycles, 11+ hrs ops.
R5-S7 6U Nov 28, 2025 SpaceX Transporter-15 (Falcon 9) Flew First prox ops maneuver immediately after dispense First R5 to execute proximity operations. ISAM-relevant.
R5-S10 6U Mar 30, 2026 SpaceX Transporter-16 (Falcon 9) Flew RPO (free-flying imager for Momentus Vigoride-7), event camera + star tracker, WiFi via Solstar in-space router First commercial partnership (Momentus). Deployed from Vigoride-7 OSV.
R5-S3/S5 6U 2026 (anticipated) TBD Pending TBD —
R5-S9 6U 2026 (anticipated) TBD Pending TBD —

Build philosophy: Assembled in shirt-sleeve environment (not clean room), propulsion in laminar flow hood only. COTS components (UP Board CHT01 flight computer, Voltaic solar panels, Ximea cameras as star trackers, Epson IMU, JAVAD GPS). Components kept in quantity — failed units replaced without schedule impact. Flat-sat integrated testing in live-sky environments.

R5-S10 significance: The Momentus partnership marks R5's transition from NASA internal demos to commercial RPO services. R5-S10 serves as free-flying imager for Vigoride-7 health assessment — exactly the ISAM (In-Space Servicing, Assembly, Manufacturing) inspection capability that JSC designed R5 to prototype. Solstar WiFi inter-satellite data relay is a novel crosslink approach.

R5 post-project: R5-S10 launched 5 months after SST project [155354] officially completed (Oct 2025). R5-S3/S5 and R5-S9 anticipated in 2026. The R5 series has become self-sustaining — continuing to fly after the formal SST project ended.

TRL note: TechPort shows TRL 5→5 (target was 9), suggesting TRL assessment hasn't been updated post-flight.

Confidence: confirmed (R5-S2/S4 via Firefly Alpha ELaNa 43; R5-S7 via Transporter-15; R5-S10 via Transporter-16 + Momentus Vigoride-7; NTRS 20240009839, 20240016467, 20250006508).

People Chains: JSC → Georgia Tech

JSC's most distinctive SST contribution is two researchers who moved from JSC to Georgia Tech, carrying CubeSat GN&C expertise:

Glenn Lightsey: AR&D → GA Tech SSDL → Lunar Flashlight

  • SST project: CubeSat AR&D Software 91360 — autonomous rendezvous and docking algorithms tailored to CubeSat constraints (2013–2016, TRL 3→4)
  • Career: Now the John W. Young Endowed Chair Professor at Georgia Tech. Runs the Space Systems Design Lab (SSDL).
  • Downstream SST connections:
  • Georgia Tech SSDL developed the propulsion system controller for Lunar Flashlight (NTRS: 20220009424) — so Lightsey's group contributed to JPL's most ambitious SST mission
  • Published AR&D Model Predictive Control algorithms (AIAA Journal of Guidance, Control, and Dynamics) applicable to CubeSat proximity operations
  • Research connects to CPOD 11588 and SSPICY 182206 RPOD concepts
  • GPDM connection (session 15): Lightsey is co-author on GPDM (155369) — GA Tech SSDL designs and integrates the GPDM spacecraft. This creates a JSC→GA Tech→GPDM chain, making Lightsey part of the GPDM convergence alongside Dankanich (iSat) and Lozano (MIT electrospray). Three SST people chains on one mission.
  • Significance: The JSC AR&D project itself reached only TRL 4, but the PI became one of the most influential CubeSat GN&C researchers in the country. The project's real output was the person, not the TRL.

John Christian: MEMS IMU → Autonomous Optical Navigation

  • SST project: MEMS IMU Swarms 91474 — using clusters of cheap MEMS IMUs to achieve precision navigation (2013–2014, TRL 3→5). Collaboration with West Virginia University and Marquette University.
  • Career trajectory: NASA JSC engineer (GNC Autonomous Flight Systems Branch, 2010–2012) → West Virginia University (Asst. Prof, 2013–2017) → Rensselaer Polytechnic Institute (2017–2021) → Georgia Tech (2021+). Now AAS Fellow (2022).
  • Downstream SST connection: PI on SST project 155359, Autonomous Optical Navigation (2023–2025), at Georgia Tech — his algorithms incorporate Artemis 1 heritage. The same person appears on SST projects 11 years apart, at different institutions.
  • Expertise: Celestial optical navigation (OPNAV), terrain relative navigation (TRN), star identification. Algorithms incorporated into "numerous space exploration missions."
  • NTRS: MEMS IMU paper at NTRS: 20150016068.

Pattern significance: Both Lightsey and Christian followed the same trajectory — NASA JSC → academic career → SST-connected research at Georgia Tech. This makes GA Tech's School of Aerospace Engineering a downstream repository of JSC's SST investment, even though the formal project outcomes were modest (TRL 3→4 and TRL 3→5). The People Chain archetype (#4) now has 6 confirmed individuals; JSC produced 2 of them.

Stellar Exploration Qualification Testing

Formally JSC-led in TechPort, but this was an ACO collaboration where JSC/WSTF provided vacuum hot-fire testing for Stellar Exploration's pump-fed hypergolic nanosatellite propulsion system. The work elevated the system to TRL 8.

See Stellar Exploration org page for full analysis. JSC's PI on both the Stellar and Phase Four ACO projects was Ali Guarneros Luna — a single NASA engineer enabling two SST propulsion companies through test infrastructure.

Transparent CubeSat Antennas

PI: David Jackson (University of Houston, via JSC). Developed low-profile transparent microstrip antennas integrated into CubeSat frames directly over solar panels, replacing fragile wire whip antennas.

Downstream: Published in IEEE Antennas and Propagation Magazine (doi:10.1109/MAP.2017.2655529). The concept of integrating antennas into solar panels parallels ISARA's reflectarray approach at a smaller scale. No known commercial adoption, but the IEEE publication gives it visibility.

Confidence: confirmed (IEEE publication, closeout document in TechPort).

Maraia Earth Return Capsule

PI: Alan Strahan. Suborbital EDL test for a small earth return capsule — could enable on-demand return of ISS samples. TRL stuck at 4 (started and ended at 4). This was JSC's human-spaceflight DNA applied to CubeSat scale, but the concept didn't find a follow-on pathway.

Confidence: confirmed (TechPort record). No visible downstream.

Institutional Character

JSC's SST portfolio reflects its crewed-spaceflight heritage:

JSC theme SST project Connection to human spaceflight
Rendezvous & docking AR&D Software [91360] ISS docking algorithms scaled down
Navigation MEMS IMU Swarms [91474] Crew vehicle GN&C miniaturized
EDL Maraia Capsule [91493] ISS sample return pathfinder
Rapid prototyping R5 [155354] Fast-cheap as payload risk reduction
Propulsion testing Stellar Qual [106831] WSTF test infrastructure

JSC didn't build a sequential institutional capability like ARC (swarm arc) or run high-ambition deep-space missions like JPL. Instead, JSC operated as a talent incubator and test facility: its SST projects were modest in scope but produced people (Lightsey, Christian) and infrastructure (WSTF testing for Stellar and Phase Four) that amplified the broader SST portfolio.

Cross-References