High-Profile SST Missions¶
SST's most visible missions β the ones that made headlines, set records, or produced lessons learned. These missions serve as the program's public face and technology proving grounds.
Last updated: 2026-04-14 (session 26 β R5 sub-mission series documented, R5-S7 added)
PhoneSat β The Origin Story (11020)¶
TRL: 5β7 | Period: 2011-11 β 2014-09 | Lead: Ames Research Center
The mission that proved commercial smartphones could serve as CubeSat avionics.
Flights: - PhoneSat 1.0 (Graham, Bell): 2Γ 1U CubeSats, launched April 21, 2013 on Antares maiden flight from Wallops Island. Survived planned 1-week mission, re-entered April 27. Sent back Earth imagery. - PhoneSat 2.0Ξ² (Alexander): 1Γ 1U CubeSat, same launch. Upgraded with two-way comms and GPS. - PhoneSat 2.4: launched November 2013 on Minotaur-1. Demonstrated smartphone as avionics controller.
Significance: PhoneSat was SST's first flight mission and one of the earliest demonstrations that COTS consumer electronics could survive in space. Cost: ~$7,000 per satellite. It established ARC as SST's primary CubeSat mission house and proved the "cheap, fast, disposable" philosophy that SST would build on for the next decade.
Downstream: PhoneSat didn't produce a commercial product, but it proved the concept that fed into every subsequent SST mission using COTS components (OCSD, Nodes, V-R3x, Starling). The philosophy was the product.
NTRS: Factsheet available. No extensive publication record found.
Outcome: flew | Confidence: confirmed
Lunar Flashlight β The Instructive Failure (106819)¶
TRL: 5β8 | Period: 2018-10 β 2023-10 | Lead: JPL | PI: John Baker
A 6U CubeSat designed to map water ice in permanently shadowed craters at the lunar south pole using near-infrared lasers.
Flight: - Launched December 11, 2022 on SLS Artemis I as a secondary payload (alongside other Artemis CubeSats). - Propulsion failure: Within the first few days, 3 of 4 thrusters underperformed. Root cause: debris (metal powder/shavings from additively manufactured fuel feed system) obstructed fuel lines. The ASCENT/AF-M315E green monopropellant system β developed by MSFC β had manufacturing-induced contamination. - Months of troubleshooting (increasing fuel pressure beyond design capacity) produced limited improvement. - Mission terminated May 12, 2023. Spacecraft entered heliocentric orbit after Earth flyby May 17.
What worked: - Sphinx flight computer (JPL) β first-ever-flown low-power radiation-tolerant CubeSat computer for deep space. Surpassed expectations. - Iris radio upgrade β deep-space communications exceeded requirements. - Both Sphinx and Iris represent genuine technology infusion from SST investment.
What failed: - The MSFC-built green propulsion system. The additive manufacturing process introduced debris that was not caught during ground testing. This is a cautionary tale for AM propulsion systems.
NTRS: 35 citations β the most of any SST project except TBIRD. Includes fracture control plans, propulsion development papers, mission design publications from MSFC, JPL, GSFC, and Georgia Tech.
Lessons for SST: 1. Deep-space CubeSat propulsion remains the hardest subsystem β Lunar Flashlight joins FEMTA and dual-mode projects in the "propulsion stall" pattern. 2. Even failed missions produce technology infusion (Sphinx, Iris). 3. The 35 NTRS publications ensure the failure was well-documented and knowledge was preserved.
Outcome: partial failure (propulsion), partial success (avionics, comms) | Confidence: confirmed
ACS3 β Advanced Composite Solar Sail System (95595)¶
TRL: 6β7 | Period: 2018-07 β 2025-04 | Lead: Ames Research Center (mission ops), Langley Research Center (booms)
NASA's first practical solar sail β propulsion without propellant.
Flight: - Launched April 23, 2024 on Rocket Lab Electron from MΔhia, New Zealand. - Spacecraft bus: NanoAvionics (Kongsberg) 12U nanosatellite bus. Size: ~23Γ23Γ34 cm. - Solar sail deployed August 29, 2024. Confirmed by telemetry and onboard camera imagery. - Sail: ~80 mΒ² (30 ft Γ 30 ft), polymer sheet on composite booms. Four 7-meter booms span the diagonals. - Minor issue: One boom slightly bent during deployment while pulling the sail taut. Mission team assessed no impact on objectives; the bend partially straightened as the sail settled. - Currently orbiting Earth, visible to the naked eye from many locations.
Key technology: The composite booms (LaRC) are the innovation β lightweight, compactly packageable, and stiff enough to deploy an 80 mΒ² sail from a 12U CubeSat. Prior solar sails (IKAROS, LightSail 2) used metallic booms.
NTRS: 17 citations spanning ARC (mission), LaRC (booms/mechanisms), flight dynamics, and a 2026 "Mission Results and Lessons Learned" paper.
Downstream: - ACS3 is explicitly a pathfinder for larger solar sail missions: space weather early warning, near-Earth asteroid reconnaissance, communications relays. - NASA's Solar Cruiser (canceled 2023, then reconsidered) would have been the next step. - The composite boom technology has applications beyond sails β deployable antennas, radiators, structural elements.
Outcome: flew (sail deployed, mission ongoing) | Confidence: confirmed
DiskSat β The Shape of Things to Come (106801)¶
TRL: 5β8 (target) | Period: 2020-09 β 2026-10 | Status: Active | Lead: The Aerospace Corporation | PI: Roger Hunter
A plate-shaped satellite β 40 inches diameter, 1 inch thick β that offers 5β10x more power and surface area than comparable CubeSats.
Flight: - Launched December 18, 2025 on Rocket Lab Electron from Wallops Island, Virginia. - 4 DiskSats deployed into 340-mile orbit. Released one by one from a cylindrical dispenser. - Weight: ~35 lbs each. Aluminum honeycomb core with carbon fiber face sheets. - Space Force involvement β Pentagon co-funded the demonstration.
Why DiskSat matters: - CubeSats are volume-limited (standard form factor constrains power and aperture). DiskSat maintains CubeSat benefits (standard launch interface, low cost, simple design) while breaking the power/aperture ceiling. - Can operate as low as 124 miles altitude (thicker atmosphere would drag conventional satellites down) due to flat profile + active drag management. - Applications: communications constellations, radar sensing, Earth observation, high-power missions that CubeSats can't handle.
People chain β Richard Welle: - PI on OCSD [11587] (optical comms, 2012β2018) - Lead author on DiskSat publications - Both projects at Aerospace Corporation β same person, same org, bridging two of SST's most innovative missions.
NTRS: 2 citations (2022 SmallSat conference paper, 2024 video).
Outcome: in progress (launched, Active) | Confidence: N/A
EDSN/Nodes β Failure and Recovery (10941, 91369)¶
EDSN: 8Γ 1.5U CubeSats for swarm networking. Lost in Super Strypi launch failure, November 3, 2015.
Nodes: 2Γ 1.5U CubeSats built from EDSN spare parts. Deployed from ISS May 16, 2016. Demonstrated first autonomous inter-satellite command relay for CubeSats. Santa Clara University ran ground ops.
The lesson: SST's approach of building extra flight units paid off. When the primary mission was lost to a launch vehicle failure (not a spacecraft problem), the spare parts enabled a recovery mission within 6 months. Nodes achieved the core networking objectives of EDSN with 2 satellites instead of 8.
Outcome: EDSN β lost (launch failure) | Nodes β flew | Confidence: confirmed
CAPSTONE β Cislunar Pathfinder (106820)¶
TRL: 5β8 | Period: 2019-10 β 2024-05 | Lead: Advanced Space, LLC | PI: Bradley Cheetham
The first spacecraft to demonstrate autonomous cislunar navigation in a Near Rectilinear Halo Orbit (NRHO) β the orbit planned for Gateway.
Flight: - Launched June 28, 2022 on Rocket Lab Electron/Photon from MΔhia, New Zealand. - Communications anomaly July 5β6 (recovered). Propulsion anomaly Sep 8 (corrected). - NRHO insertion November 13, 2022. Primary 6-month mission completed May 2023. - Extended mission ongoing β 100+ NRHO orbits as of late 2024. - 12U CubeSat, 55 lbs. Bus: Terran Orbital. Propulsion: Stellar Exploration. Comms: Tethers Unlimited.
Key technology: CAPS (Cis-Lunar Autonomous Positioning Software) β peer-to-peer navigation using LRO as reference beacon. Successfully demonstrated autonomous cislunar navigation without continuous ground contact. Built on SBIR Phase IβIIβII-E ladder from Advanced Space's LiAISON algorithm (CU Boulder academic origin).
Downstream: - CAPSTONE Extended Mission: $36.1M (2024β2026) for ongoing optical navigation experiments. - AFRL Oracle: $72M (Nov 2022) β cislunar space domain awareness spacecraft. Direct DoD application of CAPSTONE expertise. - DoD cislunar SDA contracts: ~$8.3M across 9 AFRL/AFSC awards (2023β2025). - Advanced Space total federal footprint: ~$150M+.
NTRS: 7 citations (2020β2024), including post-mission retrospectives: "Pathfinder for Artemis Gateway."
Outcome: flew (mission ongoing) | Confidence: confirmed
See: Advanced Space for full org lineage.
R5 β Launch Fast, Learn Fast (155354)¶
TRL: 5β9 | Period: 2022-09 β 2025-10 | Lead: Johnson Space Center | PM: Samuel Pedrotty
Ultra-lean 6U CubeSat platform: <$100K in materials per bus, <12 months from payload to orbit, no space-rated components. COTS avionics assembled in shirt-sleeve environment.
Flight history (10 spacecraft, 5 flown):
| Spacecraft | Launch | Vehicle | Status | Key Payload |
|---|---|---|---|---|
| R5-S1 (3U) | Feb 10, 2022 | Astra Rocket-3.3 (ELaNa 41) | Lost (launch failure) | Cameras, algorithms for EVA inspection |
| R5-S2 (6U) | Jul 3, 2024 | Firefly Alpha (ELaNa 43) | Flew | Cold gas Nβ RCS, Iridium SBD comms |
| R5-S4 (6U) | Jul 3, 2024 | Firefly Alpha (ELaNa 43) | Flew | Cold gas Nβ RCS, LANL ELROI tag |
| R5-S7 (6U) | Nov 28, 2025 | SpaceX Transporter-15 | Flew | First prox ops maneuver post-dispense |
| R5-S10 (6U) | Mar 30, 2026 | SpaceX Transporter-16 | Flew | RPO imager for Momentus Vigoride-7, event camera + star tracker, Solstar WiFi router |
| R5-S3/S5 | 2026 anticipated | TBD | Pending | β |
| R5-S9 | 2026 anticipated | TBD | Pending | β |
- R5-S2 was a late addition β NASA LSP asked R5 to fill a slot that would otherwise hold a mass simulator; R5 built and delivered a second spacecraft on the same timeline. That's the whole point.
- R5-S7 was the first R5 spacecraft to execute proximity operations β maneuvering immediately after dispense. Supports future ISAM capabilities.
- R5-S10 marks R5's transition to commercial partnerships: deployed from Momentus Vigoride-7 OSV, serves as free-flying imager for Vigoride health assessment. Solstar WiFi inter-satellite data relay is a novel crosslink approach. First R5 with a co-aligned event camera and star tracker.
- R5-S10 launched 5 months after SST project [155354] officially completed (Oct 2025). R5-S3/S5 and R5-S9 still anticipated in 2026 β the series is self-sustaining.
Lineage: Seeker CubeSat (JSC) β PACE initiative (ARC/JSC, 106799) β R5. PACE-1 launched June 30, 2021 on SpaceX Transporter-2. PACE bridged Flight Opportunities and SST programs. Pedrotty is the throughline: Seeker GNC Lead β PACE PI β R5 PM β SPLICE Chief Engineer.
NTRS: "R5-S2/S4 Preliminary On-Orbit Performance" (20240009839). "Avionics Design Architecture for Low-Cost CubeSat Missions" (20240016467, IEEE Aerospace 2025). "Launch Fast Learn Fast: Lessons Learned" (20250006508, SmallSat 2025).
Outcome: flew (5 of 6 attempts; S1 lost to launch failure) | Confidence: confirmed
PY4 β The $5K Swarm (155367)¶
TRL: 4β8 | Period: 2022-09 β 2025-02 | Lead: Carnegie Mellon University | PI: Zachary Manchester
4 Γ 1.5U CubeSats demonstrating autonomous swarm operations using radically low-cost hardware.
Flight: - Launched March 4, 2024 on SpaceX Transporter-10 (Falcon 9, Vandenberg SFB). - Built on PyCubed open-source avionics platform (Python-programmable, integrates power/compute/comms/ADCS).
What was demonstrated: - High-data-rate mesh networking - Precise inter-satellite ranging (COTS LoRa radios, two-way time-of-flight) - Range-based relative orbit determination (1-GPS-anchor method) - Magnetorquer-only sun pointing (no reaction wheels) - TID radiation measurements every 30s across 4 nodes
Core innovation: Hardware elimination. One GPS anchor + LoRa ranging reconstitutes full swarm orbital state. No GPS receivers on every node, no propulsion, no reaction wheels. This is the cost-scaling path for constellation missions.
Zachary Manchester: Associate Professor, CMU Robotics Institute. Director, Robotic Exploration Lab (REx Lab). PhD MIT AeroAstro. Founded KickSat (2011). PyCubed is deliberately open-source β no commercial spinout.
Outcome: flew | Confidence: confirmed
CHOMPTT β The Only TRL 9 (93925)¶
TRL: 4β9 | Period: 2015-02 β 2020-08 | Lead: University of Florida | PI: John Conklin
First CubeSat dedicated to precision optical time transfer. The only SST project to reach TRL 9.
Flight: - Launched December 16, 2018 on Rocket Lab Electron (ELaNa XIX). 491Γ511 km, 85Β°. - 3U CubeSat with 1U OPTI payload: chip-scale atomic clocks (CSACs), picosecond event timers, avalanche photodetectors, retroreflectors. - CSAC performance: 75 ps Allan deviation at 1s β 3Γ better than the 200 ps spec. - Bus derived from EDSN/Nodes (ARC). Partners: AFRL, University of Central Florida (ground laser at KSC TISTEF).
Why it matters: Precision time transfer is foundational for cislunar navigation beyond GPS coverage, distributed aperture arrays, and formation flying. See PNT/Timing for full context.
Downstream: No Transitioned_To or Infused_To in TechPort. The contribution is proving CSACs work on CubeSats β feeding the PNT research community rather than a single product.
Outcome: flew (TRL 9 achieved) | Confidence: confirmed
ISARA β The Antenna That Enabled MarCO (11586)¶
TRL: 5β7 | Period: 2012-10 β 2018-04 | Lead: Jet Propulsion Laboratory
Integrated Solar Array and Reflectarray Antenna β solar panels that double as a Ka-band high-gain antenna.
Flight: - Deployed from ISS December 6, 2017 (launched Nov 12, 2017 on Cygnus OA-8 "S.S. Gene Cernan"). - Demonstrated 100 Mbps Ka-band downlink β ~10,000x improvement over the 9.6 kbps CubeSat baseline. - Gain measurements matched pre-flight predictions. Clean TRL 7 result. - Also carried CUMULOS (Aerospace Corp remote sensing payload) as secondary experiment.
Key downstream β MarCO (confirmed): The folded flat-panel reflectarray technology developed for ISARA was immediately applied to MarCO (Mars Cube One) β the two 6U CubeSats that flew alongside InSight to Mars in November 2018. MarCO was the first interplanetary CubeSat mission, and its UHF relay was enabled by the same folded-panel reflectarray approach. ISARA is explicitly credited as the enabling predecessor.
NTRS: "The ISARA Mission β Flight Demonstration of a High Gain Ka-Band Antenna for 100Mbps Telecom" (20210008645, JPL 2018).
Outcome: flew | Confidence: confirmed
Summary Table¶
| Mission | Year | What | Result | Key Downstream |
|---|---|---|---|---|
| PhoneSat | 2013 | COTS smartphone avionics | Flew (3+1 sats) | COTS philosophy for all SST |
| EDSN | 2015 | Swarm networking (8 sats) | Lost (launch failure) | Spares β Nodes |
| Nodes | 2016 | Inter-satellite relay (2 sats) | Flew | β V-R3x β Starling |
| ISARA | 2017 | Ka-band reflectarray (100 Mbps) | Flew (ISS deploy) | β MarCO (first interplanetary CubeSat) |
| OCSD | 2016 | 200 Mbps laser comms | Flew | β TBIRD (1000x) |
| CHOMPTT | 2018 | Precision optical time transfer | Flew (TRL 9) | Cislunar PNT heritage |
| V-R3x | 2021 | Radio ranging swarm (3 sats) | Flew | β Starling MANET |
| PACE-1 | 2021 | Payload accelerator bus | Flew (Transporter-2) | β R5 platform |
| R5-S1 | 2022 | Rapid low-cost CubeSat | Lost (Astra failure) | β R5-S2/S4 |
| CAPSTONE | 2022 | Cislunar NRHO pathfinder | Flew (100+ orbits) | $72M Oracle (AFRL) |
| TBIRD/PTD-3 | 2022 | 200 Gbps laser comms (record) | Flew | World record |
| Lunar Flashlight | 2022 | Lunar ice mapping | Partial fail | Sphinx, Iris survived |
| Starling | 2023 | 4-sat swarm autonomy | Flew | BCT acquired by Raytheon |
| PY4 | 2024 | Low-cost 4-sat swarm | Flew (Transporter-10) | Open-source PyCubed |
| ACS3 | 2024 | Solar sail deployment | Flew | Pathfinder for larger sails |
| DORA | 2024 | 1 Gbps deployable optical rx | Flew (ISS deploy) | Relaxed-pointing optical |
| R5-S2/S4 | 2024 | Rapid low-cost CubeSat (Γ2) | Flew (Firefly) | <$100K per bus |
| DUPLEX | 2025 | Dual propulsion CubeSat | Flew (ISS deploy Dec 2, 2025) | Fiber-fed pulsed plasma (Teflon) + monofilament vaporization (Delrin). 2-year orbital test |
| HYDROS | 2022 | Water electrolysis propulsion | Flew (PTD-1) | First water propulsion in space |
| R5-S7 | 2025 | First R5 prox ops maneuver | Flew (Transporter-15) | ISAM inspection capability |
| DiskSat | 2025 | Flat-plate satellite form factor | Flew (4 sats) | Pentagon co-funded |
| R5-S10 | 2026 | RPO + WiFi crosslink (Momentus) | Flew (Transporter-16) | First commercial R5 partner |
Related Pages¶
- Smallsat Communications β full comms cluster analysis (OCSDβTBIRD, CLICK, DORA)
- Smallsat Propulsion β propulsion cluster (DUPLEX, HYDROS, Lunar Flashlight)
- Autonomy, GN&C, Computing β Starling swarm autonomy, PY4, RadPC
- PNT/Timing β CHOMPTT (TRL 9), CAPSTONE, LunaNet PNT stack
- Tyvak/Terran Orbital β PTD bus provider
- Blue Canyon Technologies β Starling bus provider
- Advanced Space β CAPSTONE/CAPS
- Carnegie Mellon β PY4 (Manchester)
- CU Aerospace β DUPLEX
- Tethers Unlimited / ARKA / CACI β HYDROS (first water propulsion in space)
- JPL β Lunar Flashlight, ISARAβMarCO
- Ames Research Center β PhoneSat, EDSN, Nodes, Starling, ACS3
- JSC β R5 platform
- Archetypes β maturation patterns