Discover & warn
Observatories and international networks find objects, refine their orbits, and communicate risk.
Independent planetary-defense research
Toward a shared response to asteroid impact risk.
TURAI — Terrestrial Unified Response to Asteroid Impacts
A research proposal for prepared, Earth-based capabilities against selected short-warning threats—and the international rules that would govern any response.
Concept stage · Not an operational system
01 THE QUESTION
The gap between warning and response.
Detection begins planetary defense. TURAI studies a narrow window: a credible threat discovered too late for a tailored space mission, yet perhaps early enough for a prepared terrestrial response.
Plan & deflect
Long-warning cases allow a mission tailored to the object's trajectory and physical properties.
Study a prepared layer
Test whether standing Earth-based capabilities could safely address a subset of short-warning scenarios.
The Version 1.0 study band is approximately 50–150 m in diameter. It is a research scope, not a formal hazard category or a claim of technical readiness.
02 THE ARCHITECTURE
A network defined by reachability.
The nearest node is not necessarily the best placed to respond. TURAI would assess trajectory, time, readiness, authorization, and whether action reduces expected harm.
CONCEPTUAL ROUTINGFIG. 01
One system, many sovereign nodes.
A proposed network of certified terrestrial capabilities, shared data interfaces, readiness rules, and independent verification.
Coverage belongs to scenarios.
Each node is assessed against particular threats and permitted actions—not a fixed circle on a map.
Choose by feasibility and risk.
Rank primary and backup options as observations change, including the option to stand down.
Prepare to act across borders.
Participating states could make suitable capabilities available under rules agreed before an emergency.
CAPABILITY CLASSES
No single technology is assumed.
Candidate methods would have to meet shared safety, readiness, authorization, and verification standards before any operational use.
Kinetic trajectory change
DART demonstrated momentum transfer; a short-warning terrestrial implementation remains a separate research problem.
High-altitude interception
Assess rapidly prepared, Earth-launched trajectories against realistic warning times and threat uncertainty.
Controlled disruption
Consider only where fragment and atmospheric models support a clear reduction in expected harm.
Terrestrial directed energy
Investigate only after propagation, pointing, power, coupling, safety, and legal feasibility are demonstrated.
Civil protection is the essential fallback. Nuclear approaches are outside the Version 1.0 baseline.
03 A CONCEPTUAL RESPONSE
A decision before any action.
Scientific validation, political authorization, and technical execution are separate steps. Intervention would require evidence that it reduces expected harm by a defined safety margin.
- 01SCIENCE
Validate the threat
Confirm the object, trajectory, uncertainty, and credible impact risk.
- 02ANALYSIS
Model the consequences
Compare intervention with non-intervention, including fragmentation and risk transfer.
- 03ASSESSMENT
Route the options
Identify feasible, authorized nodes and preserve backup or stand-down choices.
- 04GOVERNANCE
Authorize collectively
A pre-agreed multinational process decides whether intervention is permitted.
- 05RESPONSE
Act, verify, reassess
If approved, a certified node acts; independent observations track residual risk and trigger re-routing or stand-down.
+ Civil protection remains necessary whenever residual risk justifies it, including when physical intervention is unsafe or impossible.
04 INTERNATIONAL GOVERNANCE
A shared response requires shared rules.
The long-term goal is an international treaty, if research supports it. No TURAI treaty exists today. States would determine its terms and whether to participate.
“Who may act, on whose behalf, and at whose risk?”
A threatened country may not host the node best placed to respond. Advance agreements would be essential when decisions must be made under compressed timelines.
Authorization
Separate scientific confirmation from a multinational decision to intervene.
Sovereignty & transferred risk
Define consultation, acceptable thresholds, and decisions when an altered corridor could affect another state.
Liability & compensation
Study responsibility across facility, launching, threatened, and decision-making states.
Peaceful-use safeguards
Require natural-object confirmation, inspection and reporting; explicitly exclude human-made targets.
TURAI is proposed to complement existing warning and mission-planning arrangements, including IAWN and SMPAG. It does not represent either organization.
05 RESEARCH ROADMAP
Research before negotiation.
Version 1.0 sets out the architecture and the questions. The next phases would test physical reachability, consequences, decision processes, and treaty feasibility.
01 / PUBLISHED
Architecture
Definitions, prior art, governance model, and illustrative optimization.
Version 1.002 / PROPOSED
Reachability
NEO trajectories, response envelopes, and realistic warning times.
Physical feasibility03 / PROPOSED
Consequences
Fragmentation, atmospheric entry, impacts, and expected harm.
Net-risk assessment04 / PROPOSED
Governance simulation
Authorization delays, cross-border risk, and liability pathways.
Decision feasibility05 / PROPOSED
Demonstration
Tabletop exercises, digital twins, and non-hazardous validation.
Tested interfaces06 / PROPOSED
Treaty feasibility
Standards, verification, financing, mutual response, and safeguards.
Evidence for negotiation06 OPEN COLLABORATION
Help shape the next edition.
Version 1.0 is open for scrutiny. Researchers in asteroid science, mission design, atmospheric effects, space law, governance, and civil protection can help develop future editions.
Review the assumptions.
Challenge the threat scope, reachability model, consequence analysis, and claims about what a standing network could achieve.
Shape future editions.
Contribute research, simulations, legal analysis, or alternative designs. Authorship and acknowledgement would be agreed according to each contribution.
Build the treaty pathway.
If the evidence supports it, help develop proposals on authorization, sovereignty, liability, verification, peaceful use, and international participation.
07 WHAT REMAINS UNKNOWN
Questions the evidence must answer.
Real trajectory reachability, safe intervention windows, fragment outcomes, readiness costs, and the speed of multinational authorization have not been established for a TURAI network. Some scenarios may leave civil protection as the only responsible option.
The paper's geometric node-count example is a sensitivity exercise. Its assumed access radius is not an interceptor range; its selected nodes are not a deployment recommendation.
Examine the methods and limitations01 / REACHABILITY
Can a node act?
Model real trajectories, warning time, technical limits, and authorized actions.
02 / REDUNDANCY
Is there a backup?
Measure independent feasible options and account for shared failure modes.
03 / EQUITY
Who is covered?
Test whether optimization leaves particular regions or populations underserved.
08 THE WHITE PAPER
Read the full research.
Version 1.0 sets out the architecture, assumptions, quantitative formulation, governance questions, limitations, and references.
Download the PDFONGOING WORK
A proposal built to be revised.
From the IAF abstract to Version 1.0
The abstract submitted to the IAF for GLEX 2025 proposed a globally distributed response to smaller near-Earth objects. It also raised the need for international cooperation, transparent governance, and safeguards against weaponization.
Version 1.0 develops that starting point into a defined research architecture: scenario-based coverage and routing, node selection with redundancy and equity constraints, assessment of net risk, and a staged study of treaty feasibility. These ideas remain to be tested. Later editions can refine or reject them as evidence develops.