Model the physical dispersion, differential drift, and Hall-thruster orbit raising for a stack of 27 satellites ejected into Low Earth Orbit. Calculate real inter-satellite separation, ring closure, and phasing schedules.
Orbital Telemetry & Phasing Visualization
Constellation Plane & Ground Projection
MET: T+ 0d 00h 00m
Altitude: 285.0 km | Period: 90.2m
Train Length: 0.0 km | Lead Spacing: 0.0°
Drag to rotate 3D sphere • Scroll to zoom • Click satellite to track
Satellites deployed in a single launch stack (e.g., 27 Starlinks) release simultaneously or via spring pushers. A minuscule relative delta-V gradient (Δv ≈ 0.05 to 1.5 m/s) establishes subtle differences in orbital semi-major axis (Δa).
Kepler's 3rd Law: Larger orbits take longer to complete (ΔT ≈ 3π Δa / v).
Drift train: Over the first 48 hours, satellites spread out into the famous naked-eye "satellite train".
2. Differential Phasing Maneuvers
To distribute satellites equally into slots (θ = 360° / N) along the orbital ring, each satellite uses its onboard ion thrusters to hold a temporary lower or higher "phasing altitude".
Lower orbit: Faster orbital velocity drifts forward in mean anomaly.
Higher orbit: Slower velocity drifts backward relative to the injection reference frame.
Argon/Krypton Hall Thrusters: Provide steady spiral ascent (Δa ≈ 4–12 km/day).
3. Collision Screening & Stationkeeping
During the dense initial train phase, automated collision avoidance systems (COLA) monitor closest approaches between sibling satellites and space debris.