EuroShield-Space: Galileo OSNMA + Copernicus SAR +

# EuroShield-Space: Galileo OSNMA + Copernicus SAR + IRIS² Multi-Mission Defence & Civil Resilience Suite

- **Live Interactive Orbital SAR & Galileo OSNMA Command Center:** https://swsz9327-ai.github.io/TaikaiCASSINISpace2026/ - **Open-Source Repository & Deterministic Verification Suite (`exit code 0`):** https://github.com/swsz9327-ai/TaikaiCASSINISpace2026 - **Machine-Verifiable Cryptographic Audit (`SHA-256`):** `3d75a7b3daa8411506612ab6715779f2617a835bccfcc19025b3751bcc928b8e`

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## 💎 Idea

European critical infrastructure, civil protection convoys, and maritime borders face simultaneous hybrid threats: GNSS spoofing/meaconing against navigation receivers, severe weather/flooding cutting emergency logistics corridors, and illicit "dark vessels" disabling AIS transponders across European seas.

**EuroShield-Space** is an end-to-end operational software engine and tactical command dashboard that fuses all three pillars of the EU Space Programme (**Galileo / EGNOS**, **Copernicus Sentinel-1/2**, and **IRIS²**) into a single deterministic decision-support platform: 1. **Cryptographic GNSS Anti-Spoofing (`Galileo OSNMA`):** Verifies navigation messages at the bit-and-tag level via TESLA one-way key-chain validation (`SHA-256(K_i || salt) == K_{i-1}`) and 5-channel pseudorange innovation residual gating (`|r_i| / sigma > 5.0`), isolating and rejecting a `+485.0 m` spoofing attack on `PRN E24` in real time. 2. **All-Weather Crisis Corridor Re-Routing (`Copernicus Sentinel-1 SAR + Sentinel-2 NDWI`):** Fuses Sentinel-1 C-Band SAR (`VV <= -16.5 dB` specular water mask) with Sentinel-2 (`NDWI >= 0.25`) to detect flooded bridge corridors through cloud cover and computes Dijkstra shortest safe-time paths (`Depot_Alpha -> Ridge_Pass -> Hospital_Central`, `34.0 min` ETA). 3. **Dark-Vessel Maritime Surveillance (`Sentinel-1 CFAR + AIS Correlation + IRIS²`):** Executes a 2-Parameter CFAR (`Constant False Alarm Rate`, `tau = 6.0 sigma`) ship detector over maritime SAR swaths, cross-correlates radar reflectors (`Z = 11.69 sigma`, `11.25 sigma`) against AIS blackouts to flag illicit dark vessels (`SAR-M02`, `SAR-M04`), and dispatches an **IRIS²** SHA-256 authenticated alert payload.

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## 🛰️ EU Space Technologies

1. **Galileo Open Service Navigation Message Authentication (OSNMA) & EGNOS:** - Uses Galileo E1-B I/NAV OSNMA HKROOT + MACK subframes for cryptographic authentication of ephemeris and clock corrections, preventing spoofed PNT fixes for autonomous drones, emergency responders, and maritime coast guards. 2. **Copernicus Sentinel-1 (C-Band Synthetic Aperture Radar) & Sentinel-2 (Multi-Spectral Instrument):** - Uses Sentinel-1 EW/IW GRD backscatter (`sigma_0 VV/VH`) for cloud-penetrating flood delineation and maritime metallic vessel detection (`CFAR`), combined with Sentinel-2 Band 3/Band 8 `NDWI` optical confirmation. 3. **IRIS² (Infrastructure for Resilience, Interconnectivity and Security by Satellite):** - Formats priority-zero encrypted tactical alert packets (`SHA-256` payload digest) for zero-trust Leo/MEO satellite relay when terrestrial cellular links are degraded.

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## 🛡️ EU Space for Peace & Resilience (Challenges Addressed)

- **Challenge 1 — Cybersecurity for Space-Based Strategic Enablers:** Directly protects PNT infrastructure via Galileo OSNMA TESLA key-chain verification + RAIM innovation gating (`PRN E24` spoofing isolated with `0.00 m` residual position drift). - **Challenge 2 — Space-Enabled Crisis Response & Civil Resilience:** Automatically detects inundated transport nodes (`River_Bridge_North`) from Copernicus SAR/optical fusion and routes humanitarian aid along verified dry corridors. - **Challenge 3 — Countering Transnational Crime & Maritime Threats:** Identifies non-cooperative dark vessels (`SAR-M02`, `SAR-M04`) with `>11 sigma` radar cross-section anomalies and zero AIS emissions.

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## 🤼 Team

- **Byunggwon So (`@robary.com` / `@kevin9327`) — Lead Systems Architect & Geospatial AI Engineer:** Full-stack geospatial signal processing, cryptographic PNT verification (`Galileo OSNMA`), SAR CFAR target detection, and interactive mission dashboard engineering.