RHEA SPACE ACTIVITY, INC.

Washington, DC · Aerospace · Still private

GPS-denied navigation system for hypersonic reentry vehicles using inertial and alternative sensing in plasma environments

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Updated Oct 23, 2026

Sector: Aerospace
Headquarters: Washington, DC
Total capital: $7.6M

Federal grants: $7.6M; 10 awards · 2020–2026; Rank in peer group#26 of 89
Private capital raised: None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
Federal contracts: None on recordNo federal contract awards found.
Granted patents: None on recordNo USPTO grants. Applications publish after 18 months.

Capital timeline

Latest events

Mar 2026Federal grantDefense · Phase II · Small Business Technology Transfer Phase II, Topic A23B-T001, Passive Ranging For Fire Control Under Day And Night Conditions. This Continues The Effort Conducted Under Phase I STTR W15QKN-24-C-0044.$1.3M
Jul 2025Federal grantDefense · Phase I · 873AUTHORITY$140K
May 2025Federal grantDefense · Phase II · SF243-D018 Space Sustainment / Maneuver: Advancing Strategic Superiority In Orbital Operations. To Establish A Robust And Sustainable Framework To Facilitate Movement Within The Space Domain Across All Orbital Regimes, Including To And From The Moon.$1.9M
Apr 2025Federal grantDefense · Phase II · Development Of An App Named Anvil: Handheld GPS Denied Self-location For Atak To Provide U.S. Army 1ST Special Forces Command With An Atak Plugin As A Solution To Special Forces Gps-denied Atak Compatible Self-location Application.$2M
Jul 2024Federal grantNASA · Phase I · FY24 SBIR Phase I- Litpham: Low Illumination Planetary Hazard Avoidance And Mapping$150K
Jun 2024Federal grantDefense · Phase I · This STTR Phase I Award Is Entitled, "stereojam".$197K
Sep 2022Federal grantDefense · Phase II · SKY AUGER: A Deep Space-Derived GPS-Denied Optical Navigation System for USAF Reentry Vehicles$1.5M

Show 3 earlier federal awards

Jul 2022Federal grantDefense · Phase I · Spitzer-Resurrector: Telerobotic Life-Extension of Spitzer for Space Weather & Planetary Defense$250K
Apr 2021Federal grantDefense · Phase I · SCORPIUS: Solar COncentrating Refrigerated-hydrogen Propulsion for Intelligence with Unfolding Structures$50K
Mar 2020Federal grantDefense · Phase I · RUBY SKY: Cruise Missile Detection with an In-Space Coated Origami Mirror$50K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 89 peers

Line = median

Aerospace · System

Federal grants#26 · top 29%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

No founders are linked to this company yet.

Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.

Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026

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What it has protected

No granted patents are on record.

USPTO usually publishes applications 18 months after filing, so recent applications may not be visible yet. Patents assigned under a different entity name won’t match.

Checked: USPTO granted patents and published applications · Oct 23, 2026

NON-INERTIAL NAVIGATION TECHNOLOGYSimilar federal contract value in Aerospace · null in contracts
DIGITAL COPILOT, INC.Similar federal contract value in Aerospace · null in contracts
GSE INCSimilar federal contract value in Aerospace · null in contracts
Integration Innovation, Inc.Similar federal contract value in Aerospace · null in contracts
Silicon Space Technology CorporationSimilar federal contract value in Aerospace · null in contracts
BNNT LLCSimilar federal contract value in Aerospace · null in contracts

Regulatory activity · Aerospace

Sector-level, not company-level

06 Jul 2026Nondiscrimination in Federally Assisted Programs of NASA-Effectuation of Title VI of the Civil Rights Act of 1964National Aeronautics and Space Administration
01 Jul 2026Special Conditions: AMAC Aerospace, The Boeing Company Model 747- 8 Airplane; Side-Facing SeatsFederal Aviation Administration
26 Jun 2026Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures; Miscellaneous AmendmentsFederal Aviation Administration
23 Jun 2026Operating Limitations at John F. Kennedy International AirportFederal Aviation Administration
23 Jun 2026Operating Limitations at New York LaGuardia AirportFederal Aviation Administration
18 Jun 2026Special Conditions: Honeywell Aerospace US LLC, Dassault Aviation Model Falcon 900EX Airplane; Electronic System Security Protection From Unauthorized External AccessFederal Aviation Administration

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through Oct 23, 2026. SBIR and STTR awards through Oct 21, 2026.