Abstract
In order to provide a margin of safety for astronauts working untethered in the vicinity of the space shuttle, it is necessary to provide for them a means to determine conditions which would return them to the shuttle via an intercept and rendezvous maneuver. An intercept chart is developed for use in an unaided EVA environment. Given the in-plane azimuth angle, distance away, and time to intercept, the chart provides the direction and magnitude of A V required for rendezvous. The chart is valid for nominally circular orbits of all altitudes. Additional charts are presented which provide closing velocity information as well as total AK requirements necessary for planning rendezvous maneuvers. Finally, a brief error analysis is presented along with a series of charts which provide a simple method of estimating the effects of errors in initial conditions on terminal position and velocity.
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