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International Space Law, Space Traffic, & Insurance

Operating a satellite is not just a physical and technical challenge; it is a complex legal undertaking. Because outer space is not subject to national sovereignty, the legal frameworks governing space operations rely on international treaties, state supervision, and financial risk mitigation through insurance. This chapter covers the foundational space treaties, collision avoidance coordination, and third-party liability insurance.

The Core UN Space Treaties & Liability​

All national space laws flow from international treaties drafted under the auspices of the United Nations Committee on the Peaceful Uses of Outer Space (UNCOPUOS).

1. The Outer Space Treaty (1967)​

The Outer Space Treaty (OST) is the "constitution" of space law. Two articles are of critical importance to commercial operators:

  • Article VI (State Responsibility): States bear international responsibility for national activities in outer space, whether carried out by governmental agencies or non-governmental entities (like private corporations). The treaty mandates that private space activities require authorization and continuing supervision by the appropriate State Party. This is why countries have national licensing regimes.
  • Article VII (Liability for Damage): Each State Party that launches or procures the launching of an object into outer space, and each State Party from whose territory or facility an object is launched, is internationally liable for damage caused to another State Party.

2. The Liability Convention (1972)​

The Liability Convention elaborates on Article VII of the OST, establishing a dual-liability regime based on where the damage occurs:

  • Absolute Liability (Article II): A launching State is absolutely liable to pay compensation for damage caused by its space object on the surface of the Earth or to aircraft in flight. Proving fault or negligence is not required.
  • Fault-Based Liability (Article III): In the event of damage caused elsewhere than on the surface of the Earth to a space object of one launching State by a space object of another launching State (e.g., an in-orbit collision), the latter is liable only if the damage is due to its fault or the fault of persons for whom it is responsible. Proving fault in space is extremely difficult, as it requires demonstrating a failure of standard operating care.

Who is the "Launching State"?​

Under both treaties, a Launching State is defined as:

  1. A State which launches a space object;
  2. A State which procures the launching of a space object;
  3. A State from whose territory a space object is launched;
  4. A State from whose facility a space object is launched.

Because a single satellite mission can involve a launch from the US, procuring services from a UK company, and operating from Luxembourg, multiple states can be deemed "Launching States" and share joint and several liability.

Space Traffic Management & Conjunction Assessments​

With the rise of orbital debris and large constellations, active collision avoidance has become mandatory. Operators must perform regular Conjunction Assessments (CA) to determine if their satellite is on a collision course with another object.

The Conjunction Assessment Workflow​

  1. Tracking & Surveillance: Ground-based radar and optical telescopes track objects in orbit.
    • Government Networks: The US Space Command's 18th Space Defense Squadron (18th SDS) runs the Space Surveillance Network and acts as the primary global data provider. In Europe, the EU SST (Space Surveillance and Tracking) provides tracking support for European operators.
    • Commercial SSA Services: Commercial Space Situational Awareness (SSA) sensor networks supplement government data by providing high-frequency tracking of specific orbital pathways.
  2. Conjunction Data Messages (CDMs): When tracking networks identify a potential close approach (a "conjunction"), they generate and send a CDM to the affected operators. The CDM includes the time of closest approach (TCA), the miss distance, and the probability of collision (PcP_c).
  3. Operator Coordination: If the probability of collision exceeds a set threshold (typically 1 in 10,000 or 1 in 100,000), the operators must act:
    • Direct Ephemeris Sharing: Operators share their high-accuracy orbital ephemerides (predicted flight paths, including planned maneuvers) to resolve data uncertainties.
    • Maneuver Planning: The operators agree on who will perform an avoidance maneuver. Typically, the active satellite with propulsion will maneuver, while the passive satellite (or dead debris) remains on its trajectory.

To maintain neutrality and avoid conflict of interest, operators increasingly use standardized, automated coordination platforms to share data without promoting specific commercial tracking vendors.

Financial Security: Third-Party Liability Insurance​

Because launching states are held internationally liable for damage under the UN treaties, they protect themselves by requiring operators to secure Third-Party Liability (TPL) Insurance as a condition of their national launch and operations licenses.

If a satellite crashes into a house or strikes an aircraft, the victim's government will claim compensation from the launching state under the Liability Convention. The launching state will then use the operator's TPL insurance policy to cover the payout.

Regulator (State) ──> Requires ──> Operator ──> Secures ──> TPL Insurance Policy
  │                                                            │
  └───────── Pays Launching State if Liability Claim Occurs ───┘

Global Licensing Requirements​

Governments apply different methodologies to calculate the required insurance coverage:

  • United States (FAA/AST): Enforces the Maximum Probable Loss (MPL) methodology. The FAA calculates the maximum damage that could realistically occur during launch and early orbit. The operator must purchase insurance up to this MPL cap (which is capped by law at $500 million for third-party liability).
  • United Kingdom (UKSA): Requires a standard TPL insurance limit of £60 million for orbital operations. However, UKSA can reduce this requirement to £50 million or even waive it completely (£0) for low-risk, low-altitude LEO missions that utilize advanced debris mitigation plans.
  • France (CNES): Under the French Space Operations Act (FSOA), third-party liability insurance is required up to a cap (typically between €50 million and €70 million). If damage exceeds this cap, the French state steps in to guarantee the excess, protecting the operator from unlimited liability.

Next Steps​

Further Reading​