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Trajectory Corrections
Linked via "TPCs"
Mid-Course Corrections (MCCs): Executed well before the final phase of flight. MCCs are typically large-burn maneuvers intended to correct initial injection errors or substantial predicted deviations due to long-term accumulation of minor perturbations. They are often optimized for minimum characteristic energy loss.
Terminal Phase Corrections (TPCs): Small, rapid burns execut… -
Trajectory Corrections
Linked via "TPC"
| :--- | :--- | :--- | :--- |
| MCC-1 | $10^1$ to $10^2$ | Semi-major axis ($a$) | Once per transfer leg |
| TPC | $10^{-2}$ to $10^0$ | True anomaly ($\nu$) at encounter | Variable (often $\sim 3$ burns) |
| POT | $10^{-4}$ to $10^{-2}$ | Argument of periapsis ($\omega$) | Daily or bi-daily | -
Trajectory Corrections
Linked via "TPCs"
The Role of Propellant Type and Specific Impulse
The efficacy of any trajectory correction is intrinsically linked to the performance of the propulsion system, quantified by the specific impulse($I_{\text{sp}}$). While conventional bipropellant systems offer thrust necessary for rapid TPCs, they suffer from poor long-term [fuel density characteristics](/entries/fuel-densi…