Accession Number : AD0610231

Title :   VELOCITY AND TIME REQUIREMENTS FOR ORBITAL TRANSFER AND RENDEZVOUS.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Forster,Tom Jennings ; Gooch,Lawrence Lee

Report Date : AUG 1964

Pagination or Media Count : 104

Abstract : A nomographical technique is presented for determining the total velocity increment and time required to complete an orbital transfer between two elliptical orbits in the same gravitational sphere of influence. The general case of non-coaxial, inclined, elliptical orbits is considered. The problem is simplified into a pseudo-coplanar problem by making the plane change at the line of nodes. The mathematical model used is based on unperturbed conic sections and instantaneous velocity impulses. The elements of the transfer ellipse are derived in terms of the orbital parameters of the initial and final orbits. The departure point, arrival point, and change in flight path angle at departure or arrival are the independent variables. The solution to the problem is portrayed on a set of nomographs which provides answers of sufficient accuracy for the initial planning of a mission. The report also includes investigations of timing control and velocity optimization. A time matching technique is presented for the selection of the transfer path necessary to rendezvous.

Descriptors :   (*TRANSFER TRAJECTORIES, NOMOGRAPHS), (*NOMOGRAPHS, TRANSFER TRAJECTORIES), (*RENDEZVOUS TRAJECTORIES, NOMOGRAPHS), (*MANEUVERING SATELLITES, TRANSFER TRAJECTORIES), ORBITS, ELLIPTICAL ORBIT TRAJECTORIES, INCLINED ORBIT TRAJECTORIES, MATHEMATICAL MODELS, RENDEZVOUS SPACECRAFT, MANNED SPACECRAFT, FEASIBILITY STUDIES, OPTIMIZATION, PERTURBATION THEORY, CELESTIAL MECHANICS, EQUATIONS, VELOCITY, NUMERICAL ANALYSIS, OPERATIONS RESEARCH, PROGRAMMING LANGUAGES, DIGITAL COMPUTERS, AIR FORCE

Distribution Statement : APPROVED FOR PUBLIC RELEASE