Orbital Rendezvous & Docking Planner

Flight Director

In Corridor

Waypoint / Hold Point Preset

Range (R)

200.0 m

Closure Rate

-0.25 m/s

RCS Propellant

94.2 %

V-Bar (X)

-200.0 m

H-Bar (Y)

+1.2 m

R-Bar (Z)

-0.4 m

Clohessy-Wiltshire Burn Solver ΔV: 0.18 m/s

RCS Manual Pulse Control (LVLH) Pulse: 0.05 m/s

System nominal. Spacecraft transponder locked onto ISS Harmony IDA docking port.

LVLH RELATIVE NAV | ISS HARMONY FORWARD (PMA-2/IDA-2)

APPROACH CONE: 10° V-BAR NOMINAL 98.4% ALIGNED

Total Accumulated ΔV: 1.42 m/s Lat Error: 0.24 m

Capture Criteria

< 0.10 m/s & < 0.3m Off

Telemetry Log & Real-Time Event Stream

Real-time record of thruster firings, corridor entry gates, attitude hold corrections, and range milestones.

[MET 04:12:00]Laser Optical Ranging transponder acquired ISS retro-reflector array.

[MET 04:12:45]Keep-Out Sphere (200m) entrance clearance confirmed by Houston & TsUP.

[MET 04:13:10]Clohessy-Wiltshire relative drift compensation nominal. Holding on +V-bar.

Orbital Rendezvous Physics: Clohessy-Wiltshire Equations

In low Earth orbit (420 km altitude, orbital speed ~7.66 km/s), maneuvers in proximity to the International Space Station do not obey intuitive linear physics. An eastward burn (speeding up) raises your orbital apogee, causing the spacecraft to drift upwards and backwards relative to the station due to Kepler's third law.

The Clohessy-Wiltshire (Hill's) Equations formulate relative motion in the Local-Vertical Local-Horizontal (LVLH) coordinate frame:
• +V-bar (X): Along the station's orbital velocity vector.
• +R-bar (Z): Radial vector pointing towards Earth center.
• +H-bar (Y): Out-of-plane cross-track angular momentum vector.