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The program LP1 calculates outbound and return trajectories between low earth orbit (LEO) and libration point no. 1 (L1). Libration points (LP) are defined as locations in space that orbit the Earth such that they are always stationary with respect to the Earth-Moon line. L1 is located behind the Moon such that the pull of the Earth and Moon togeth

Autor: NASA Technical Reports Server (NTRS)

Fuente: https://archive.org/


Introducción



LEO to L I Trajectory Program NASA Contract No.
NAS9-17878 Eagle Eng.
Report No.
88-219 October 30,1988 LP1 User and Technical Documentation National Aeronautics and Space Administration Lyndon B.
Johnson Space Center Advanced Projects Office Eagle Engineering, Inc. Houston, Texas October, 1988 NASA Contract NAS9-17878 Eagle Engineering Report No.
88-219 Foreword This program is an important tool in the study of alternative routes between the Earth and the Moon.
Dr.
John Alred was the NASA Technical Monitor for the contract under which this program was produced.
Mr.
Andy Petro was the NASA Task Manager for this particular task. Mr.
Bill Stump was the Eagle Project Manager for the contract under which this program was produced.
The program was written by Jack Funk, originally in Quick Basic, and translated into Fortran by Mr.
Bill Engblom.
Mr.
Engblom also prepared the documentation. Table of Contents 1.o Introduction . 1 2.0 Programhput. . 4 3 .O ProgramOutputs . 4.0 Program Execution Instructions 7 . 20 A. ProgramFlow Chart A-1 B. Program Code Listing . B-1 C. Program Variables . C-1 D. Detailed Main Program Description D-1 E. Detailed In-Program Subroutine Description . E- 1 F. Description of Flyby Subroutine . F- I G. Description of Gamacalc Subroutine . G...






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