Accession Number : AD0838858

Title :   LOW THRUST CONSTANT ACCELERATION TRAJECTORIES FOR SOLAR PROBE MISSIONS.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Brock, Harvey T., Jr

Report Date : JUN 1968

Pagination or Media Count : 111

Abstract : Trajectories for the 0.05 AU solar probe mission were investigated for a low thrust constant acceleration probe. Accelerations of .0002 ge to .0007 ge (ge = 32.174 ft/sq sec) were investigated and only two ranges were found acceptable: 2.0 - 2.5 x .0001 ge and 3.4 -4.0 x .0001 ge. The major limiting factor was the requirement that the terminal angle between the Earth-Sun line and the probe-Sun line lie in the range 30 degrees to 150 degrees in order to facilitate communication with the probe. Formulas which may be used to generate the influence coefficients for the guidance equations were also derived. (Author)

Descriptors :   *SUN), (*SPACE PROBES, (*INTERPLANETARY TRAJECTORIES, MATHEMATICAL ANALYSIS), INTERCEPT TRAJECTORIES, SOLAR FLARES, SOLAR WIND, LAUNCHING, CORRELATION TECHNIQUES, EQUATIONS OF MOTION, DIFFERENTIAL EQUATIONS, THESES, ACCELERATION, THRUST, PAYLOAD, PRESET GUIDANCE, NAVIGATION COMPUTERS, COMMAND GUIDANCE, COMPUTER PROGRAMS.

Subject Categories : Statistics and Probability
      Unmanned Spacecraft
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE