Executive Brief: OD-SSA v2.0 Constraint-Based Orbital Debris Space Situational Awareness

Multi-phase strategic infrastructure addressing three critical Space Situational Awareness failures: (1) 500,000-1,200,000 object blind spot - 1-10cm debris fragments create major mission-ending risks but 0% cataloged (current threshold ~10cm); (2) 100,000-maneuver-per-year unpredictability crisis - Starlink executes 50,000 collision avoidance maneuvers in six months averaging 14 per satellite per year, single missed maneuver creates 9-100km error within 24h invalidating conjunction predictions; (3) months-long processing bottleneck - Cosmos 1408 ASAT fragmentation into 1,500+ objects required "months" to catalog despite instant detection, Iridium-Cosmos collision discovery took "several years." OD-SSA v2.0 employs three structural innovations: Tile-Based Admission (5-10 priority LEO tiles Phase 0 → 40-60 LEO + 10-20 MEO Phase 1 → comprehensive Phase 2, explicit coverage boundaries with HALT outside proven regions), Behavior-Class Separation (C_passive predictable debris with multi-day custody, C_active-attested cooperative satellites with Maneuver Intent Message cryptographic protocol extending custody to declared intent window, C_active-opaque non-cooperative satellites excluded from separation assurance beyond 24h due to fundamental unpredictability), Multi-Modal AND-Gate Safety (IFF transponder 10⁻² miss × radar density 10⁻³ FAR × EO/IR optical veto 10⁻² = 10⁻⁷ effective false-clear risk through independent modality multiplication). Space-Based Small-Object Fence (SBSOF) architecture: 150-250 satellite constellation with dual-band S+X radar explicitly sized for 72h revisit of 500,000 objects. Processing infrastructure: exascale GPU clusters ($600M-1.6B) with PHD/CPHD density estimation (linear complexity in measurements vs JPDA/MHT factorial complexity in targets), validated via Cosmos 1408 burst replay requiring <6h cataloging (HALT gate - no Phase 1 without proof). Economic compliance framework: service-tier gating (premium conjunction assessment requires attested passivation/disposal status), mass-normalized bonds released on verified end-of-life compliance, FCC Space Modernization NPRM enforcement (MIM required for new licenses with ≥6h lead time), insurance coupling, published shell-level compliance statistics. Timeline: Phase 0 pathfinder 36mo ($500-750M processing validation + 1-3 demo satellites + MIM pilot), Phase 1 Block-1 8-12yr IOC ($8-15B for 40-80 satellites + ground infrastructure), Phase 2 scale-out 15-20yr FOC ($18-28B total lifecycle for 150-250 satellites + 500k catalog). Honest decade-scale timeline acknowledges sensor development 3-5yr, production capacity 10-20 units/year, constellation deployment 4-8yr, legacy fleet turnover 15yr for full MIM compliance. Attribution framework with L_null category: UN registry backbone tracks 88% satellites, ~0% debris (admits registry gaps, tracks unknowns explicitly). CDM-ACK overlay: application-layer receipts over existing transport providing verifiable delivery without CCSDS standard revision. Addresses NASA ORDEM/ESA MASTER-8 statistical models, documented 5-40% LEO disposal compliance and 50% overall mitigation guideline compliance, Department of Commerce TraCSS civil SSA transition, Space Force conjunction assessment operations. Generated via 47-minute constraint synthesis across three iterations (S1→S1b→S2) demonstrating rapid architecture evolution. Testable predicates enable risk-informed acquisition: P-ACC-1 Cosmos 1408 <6h cataloging, P-CGC-1 tile coverage ≥90% arc visibility ≤72h revisit, P-CCC-1 C_active-opaque exclusion enforcement, P-BRC-1 reserve capacity >0 under historical peaks. Cost sensitivity sourced from Space Fence $1.6B analog, exascale $600M precedent. Applications: megaconstellation coordination (SpaceX/O