Arizona State University — CubeSounder¶
Low SWaP-C millimeter-wave weather sounder on World View balloons
Investigated: Session 99, 2026-04-07
Institution & Team¶
| Field | Value |
|---|---|
| Lead Org | Arizona State University (HSI) — Phoenix, AZ |
| PI | Sean A. Bryan (Associate Research Professor, ECEE; email now @jpl.nasa.gov — possible JPL move) |
| Co-Is | Philip Mauskopf, Christopher Groppi, Daniel Bliss (all ASU) |
| Domain | Millimeter-wave atmospheric sounding for weather forecasting |
Sean Bryan develops novel systems for remote sensing, wireless communications, and astronomy. His group built a CubeSat-scale filter bank spectrometer that replicates the atmospheric sounding capability of full-size weather satellite instruments at ~10× less SWaP-C.
PI mobility signal: Bryan's TechPort contact email is sean.a.bryan@jpl.nasa.gov, not ASU. His LinkedIn still says ASU (as of search date). This may indicate a recent move to JPL — notable because JPL's Microwave Limb Sounder group works on exactly this technology class. If confirmed, this is a classic "PI carries FO-matured tech to a major center" pattern.
FO Project¶
106656 — CubeSounder: 3D Weather Imaging Sensor on High-Altitude Balloon¶
- Status: Completed, Closed Out Apr 2025
- TRL: 4 → 6
- TX: TX13.4.3 High-Fidelity Simulation and Visualization
- Destination: Earth
- Period: Feb 2021 – Apr 2025 (4 years)
- Views: 3,144
Technology: A low SWaP-C millimeter-wave filter bank that collects 3D images of atmospheric temperature and humidity. Reduces the sensor's weight, size, and power by ~10× compared to existing satellite microwave sounders. Goal: deploy dozens of cheap sensors instead of 1-2 expensive ones.
Flight heritage: Two FO balloon flights on World View Stratollite (Tucson, AZ): - Flight 1: April 9-13, 2022 (first data collection) - Flight 2: ~2023 (refined version; details sparse)
Both flights used World View's Stratollite balloon platform — the same company in the FO portfolio (later acquired by Ondas Holdings Apr 2026).
TechPort Footprint¶
| Project | Program | Role | Period |
|---|---|---|---|
| 106656 | FO | Lead | 2021–2025 |
Single TechPort project. No SBIR/STTR history under ASU for this technology.
Funding¶
No USASpending contracts found for CubeSounder or Sean Bryan at ASU. The FO project was likely funded through a cooperative agreement or NASA grant not captured in USASpending's contract database.
Publications¶
- Bryan presented "Seeing with the Rainbow: Hyperspectral Remote Sensing with SPHEREx and CubeSounder" (Oct 17, 2024 — CWRU Physics seminar)
- IEEE/conference papers likely exist but not confirmed in this search
- Google Scholar: Bryan has 6,385 citations across microwave engineering, cosmology, signal processing
Downstream Analysis¶
Commercial Path¶
Bryan stated: "We could commercialize this with World View, like if they need more of these sensors for what they do, maybe we commercialize it with them." However: - World View was acquired by Ondas Holdings (Apr 2026) — commercial partnership status unknown post-acquisition - No commercial contracts or product found - No NOAA commercial data buy confirmed (NOAA has issued RFPs for commercial microwave sounder data, which is the natural market)
Market Context¶
NOAA's commercial weather data pilot (CWDP) is actively seeking commercial microwave sounder data providers. CubeSounder's low SWaP-C design fits this market perfectly — cheap, deployable on CubeSats or balloons, NOAA-relevant bands. But no evidence Bryan/ASU pursued this path.
Why It Didn't Commercialize (Assessment)¶
- Academic PI without commercial vehicle — no startup, no license, no SBIR
- World View partnership was aspirational, not contractual
- PI may have moved to JPL — taking expertise to government lab rather than commercial sector
- NOAA commercial weather market exists but requires a company to bid, not a university lab
Assessment¶
| Dimension | Rating |
|---|---|
| Technology readiness | Moderate — TRL 6, balloon-validated |
| Funding trajectory | Flat — single FO project, no follow-on |
| Commercial viability | Low — no commercial entity, PI possibly moved to JPL |
| Downstream impact | Research contribution only; commercial weather market opportunity missed |
| Confidence | Confirmed (TRL achieved) / Speculative (downstream) |
Outcome category: Research Contribution — Academic Lab
Archetype: University research that validates a concept but lacks a commercial pathway. The technology is real (TRL 6, balloon-proven) but without a startup or industry partner, it stays in the lab.
Time dimension: FO project ran 4 years (2021-2025). No commercial outcome after closure. If Bryan moved to JPL, the expertise transfers to a government context (MLS heritage) rather than commercial sector.
Key insight: CubeSounder illustrates the gap between technical validation and commercialization for university-led FO projects. The NOAA commercial weather data market is real and growing, but academic PIs rarely have the infrastructure to bid on commercial data buys. A company like World View (or its Ondas successor) could be the commercialization partner, but no formal arrangement existed.
Open Questions¶
- Has Bryan moved to JPL? TechPort email says @jpl.nasa.gov. If so, CubeSounder technology may feed into JPL's next-generation atmospheric sounder programs.
- Did NOAA's commercial weather data pilot ever evaluate CubeSounder data?
- What is the Ondas/World View stance on hosting weather sensors as a commercial service?
- Are there publications from Flight 2 that document the improved sensor performance?
Sources: TechPort 106656; FO Technologies page; ASU ECEE profile; ASU NewSpace; NASA.gov ("NASA-Supported Sensor Aims to Improve Weather Data Collection"); Google Scholar