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be a descrption or the propulsion systems available, the $$\Delta\mathrm{V}$$ available from each, and the $$\Delta\mathrm{V}$$ required for abort.

The major constraints which shape all abort trajectories are as follows:

The mission phases considered in this discussion will be (1) launch—to—earth parking orbit, (2) earth parking orbit coast, (3) translunar injection, (4) translunar coast, (5) lunar orbit insertion, (6) lunar orbit cost (7) transearth injection, and (8) transearth coast. Note that aborts during LM maneuvers are not considered would be to rendezvous.

ABORTS DURING LAUNCH PHASE