14.1.3 — Space Traffic Management — maturity: live

Manoeuvre Coordination

Coordinating collision-avoidance manoeuvres between satellite operators in real time, ensuring that one operator's evasive action does not create a new hazard for a third party.

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Every conjunction event in low Earth orbit presents a coordination problem, not just a navigation one. When two operators independently decide to manoeuvre away from the same predicted close approach, their uncoordinated burns can transform a manageable risk into a catastrophic one — a phenomenon known as the 'manoeuvre dilema'. Without a trusted, authoritative intermediary that can see all actors simultaneously and broker agreed manoeuvre plans, the probability of collision can paradoxically increase the moment operators try to act.

A sovereign manoeuvre-coordination service closes that gap by operating a dedicated tracking and communication layer that ingests state vectors from national and allied catalogues, computes conjunction geometries at sub-kilometre accuracy, and issues coordinated manoeuvre advisories with clear responsibility assignments. The satellite component — a set of LEO relay and ranging microsatellites — provides time-stamped ranging crosslinks that sharpen orbital state knowledge to the 10–50 m level in real time, far better than ground-based radar alone. The ground segment runs the optimisation solver on a sovereign compute cluster, producing manoeuvre windows that satisfy all parties without exporting sensitive orbital data to a foreign intermediary.

Operationally, the outcome is a national STM authority that can compel or strongly advise domestic operators, coordinate bilaterally with allied agencies under data-sharing treaties, and maintain a contemporaneous record of which operator was responsible for which manoeuvre decision — legally critical when insurance claims or liability proceedings follow a close call. Nations that rely on a commercial or foreign provider for this function hand over both operational control and forensic evidence to a third party they cannot audit.

What matters

Uncoordinated independent manoeuvres by two operators responding to the same conjunction can increase collision probability by an order of magnitude compared with a jointly planned burn.
Manoeuvre responsibility attribution is a legal requirement under national space laws in the UK, France, and Germany, and is foundational to any future international liability framework.
Real-time crosslink ranging between constellation members can reduce radial orbit uncertainty to under 20 m, the threshold at which manoeuvre-or-hold decisions become operationally credible rather than precautionary.
A foreign-operated coordination service can delay, withhold, or condition advisory messages during a crisis, giving the provider's home state asymmetric leverage over another nation's space assets.

Sovereignty score: 9/10 — A nation that cannot coordinate its own operators' manoeuvres in real time without routing decisions through a foreign service has effectively outsourced both operational control and legal accountability for its orbital assets.

National space laws (e.g. France's loi relative aux opérations spatiales, UK Space Industry Act 2018) place liability for collision damage on the authorising state — that liability cannot be discharged by a foreign intermediary who holds the decision record.
During political or military crises, a foreign coordination provider may suspend service, slow advisory issuance, or condition access on information-sharing concessions, directly threatening the continuity of critical national satellite services.
Participation in manoeuvre coordination exposes precise orbital state vectors and manoeuvre-planning logic; routing this through a commercial or allied platform transfers sensitive intelligence about national constellation architecture to a counterpart with its own strategic interests.
As mega-constellations densify LEO, coordination requests will scale to thousands per week; only sovereign infrastructure with direct operator-interface authority can enforce compliance and maintain the contemporaneous manoeuvre log that international liability proceedings will require.

Reference architecture

Payload: Dual-mode RF crosslink and optical inter-satellite ranging payload; Ka-band crosslinks at 1 Gbps for telemetry relay; laser ranging unit achieving 5 m two-way range precision at up to 2000 km baseline; secondary S-band beacon for TT&C compatibility with national ground network
Bus class: 12U cubesat bus, 24 kg wet, 40 W average payload power, cold-gas propulsion with 30 m/s delta-v for station-keeping and phasing
Orbit: Sun-synchronous LEO at 550–600 km, 18-satellite walker constellation (3 planes × 6 satellites), providing continuous crosslink geometry coverage of all populated orbital shells from 400 to 1200 km; 95-minute orbital period
Ground segment: Primary mission control at a national space operations centre with X-band uplink/downlink; two geographically separated backup stations for resilience; hardened fibre interconnect to the national STM authority operations floor; no reliance on commercial ground-station-as-a-service providers for classified command traffic
Software & data
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References

ESA Space Debris Office — Collision Avoidance Operations — ESA documents its automated collision avoidance service for ESA missions and describes the manoeuvre coordination process, including the challenge of accounting for third-party operator intentions when planning burns.
ITU Radio Regulations — Coordination Procedures for Space Stations — The ITU Radio Regulations establish the legal framework for frequency and orbital-slot coordination, the procedural antecedent to operational manoeuvre coordination among licensed operators.
UNOOSA — Long-term Sustainability of Outer Space Activities Guidelines — Guideline 2.3 of the LTS guidelines calls on states to coordinate manoeuvres to avoid collisions and to share relevant orbital data, affirming sovereign responsibility for operator behaviour.
Space Policy Institute, George Washington University — Space Traffic Management: Towards a New Paradigm — Analysis of the manoeuvre coordination gap identifies the absence of a trusted broker as the single largest operational risk in crowded LEO, noting that bilateral coordination today depends on informal industry channels with no accountability mechanism.
US Space Force 18th Space Control Squadron — Conjunction Assessment — 18 SPCS issues conjunction data messages to operators worldwide but explicitly does not coordinate manoeuvre responses, leaving the bilateral negotiation gap unaddressed and highlighting the need for dedicated national coordination infrastructure.