Item Details

Analysis of Trajectory Parameters for Probe and Round-Trip Missions to Venus

by James F. Dugan, Jr., and Carl R. Simsic
Format
Book; Government Document; Online; EBook
Published
Washington, [D.C.] : National Aeronautics and Space Administration, 1960.
Language
English
Series
NASA Technical Note
Summary
For one-way transfers between Earth and Venus, charts are obtained that show velocity, time, and angle parameters as functions of the eccentricity and semilatus rectum of the Sun-focused vehicle conic. From these curves, others are obtained that are useful in planning one-way and round-trip missions to Venus. The analysis is characterized by circular coplanar planetary orbits, successive two-body approximations, impulsive velocity changes, and circular parking orbits at 1.1 planet radii. For round trips the mission time considered ranges from 65 to 788 days, while wait time spent in the parking orbit at Venus ranges from 0 to 467 days. Individual velocity increments, one-way travel times, and departure dates are presented for round trips requiring the minimum total velocity increment. For both single-pass and orbiting Venusian probes, the time span available for launch becomes appreciable with only a small increase in velocity-increment capability above the minimum requirement. Velocity-increment increases are much more effective in reducing travel time for single-pass probes than they are for orbiting probes. Round trips composed of a direct route along an ellipse tangent to Earth's orbit and an aphelion route result in the minimum total velocity increment for wait times less than 100 days and mission times ranging from 145 to 612 days. Minimum-total-velocity-increment trips may be taken along perihelion-perihelion routes for wait times ranging from 300 to 467 days. These wait times occur during missions lasting from 640 to 759 days.
Description
46 p. : ill. ; 26 cm.
Mode of access: Internet.
Notes
  • "NASA TN D-470."
  • "Lewis Research Center, Cleveland, Ohio."
  • "November 1960."
  • Cover title.
  • Includes bibliographical references (p. 16).
Series Statement
NASA technical note ; D-470
Other Forms
Also available online from the NASA Technical Reports Server (http://ntrs.nasa.gov/). Address as of 10/16/06: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19980232221_1998390134.pdf.
Logo for No Copyright - United StatesNo Copyright - United States
Technical Details

  • LEADER 03585nam a2200553Ia 4500
    001 011443903
    003 MiAaHDL
    005 20141009010000.0
    006 m d
    007 cr bn ---auaua
    008 061017s1960 dcua bt f000 0 eng d
    024
    8
      
    a| N98-27368
    024
    8
      
    a| 19980232221
    035
      
      
    a| sdr-uiuc6398741
    035
      
      
    a| (OCoLC)73335331
    040
      
      
    a| FER c| FER
    049
      
      
    a| UIUU
    100
    1
      
    a| Dugan, James F.
    245
    1
    0
    a| Analysis of trajectory parameters for probe and round-trip missions to Venus / c| by James F. Dugan, Jr., and Carl R. Simsic.
    260
      
      
    a| Washington, [D.C.] : b| National Aeronautics and Space Administration, c| 1960.
    300
      
      
    a| 46 p. : b| ill. ; c| 26 cm.
    490
      
    0
    a| NASA technical note ; v| D-470
    500
      
      
    a| "NASA TN D-470."
    500
      
      
    a| "Lewis Research Center, Cleveland, Ohio."
    500
      
      
    a| "November 1960."
    500
      
      
    a| Cover title.
    504
      
      
    a| Includes bibliographical references (p. 16).
    520
      
      
    a| For one-way transfers between Earth and Venus, charts are obtained that show velocity, time, and angle parameters as functions of the eccentricity and semilatus rectum of the Sun-focused vehicle conic. From these curves, others are obtained that are useful in planning one-way and round-trip missions to Venus. The analysis is characterized by circular coplanar planetary orbits, successive two-body approximations, impulsive velocity changes, and circular parking orbits at 1.1 planet radii. For round trips the mission time considered ranges from 65 to 788 days, while wait time spent in the parking orbit at Venus ranges from 0 to 467 days. Individual velocity increments, one-way travel times, and departure dates are presented for round trips requiring the minimum total velocity increment. For both single-pass and orbiting Venusian probes, the time span available for launch becomes appreciable with only a small increase in velocity-increment capability above the minimum requirement. Velocity-increment increases are much more effective in reducing travel time for single-pass probes than they are for orbiting probes. Round trips composed of a direct route along an ellipse tangent to Earth's orbit and an aphelion route result in the minimum total velocity increment for wait times less than 100 days and mission times ranging from 145 to 612 days. Minimum-total-velocity-increment trips may be taken along perihelion-perihelion routes for wait times ranging from 300 to 467 days. These wait times occur during missions lasting from 640 to 759 days.
    530
      
      
    a| Also available online from the NASA Technical Reports Server (http://ntrs.nasa.gov/). Address as of 10/16/06: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19980232221_1998390134.pdf.
    538
      
      
    a| Mode of access: Internet.
    650
      
    7
    a| Perihelions. 2| nasat
    650
      
    7
    a| Approximation . 2| nasat
    650
      
    7
    a| Planar structures. 2| nasat
    650
      
    7
    a| Eccentricity. 2| nasat
    650
      
    7
    a| Space probes. 2| nasat
    650
      
    7
    a| Planetary orbits. 2| nasat
    650
      
    7
    a| Space missions. 2| nasat
    650
      
    7
    a| Trajectories. 2| nasat
    650
      
    7
    a| Venus (planet). 2| nasat
    700
    1
      
    a| Simsic, Carl R.
    710
    2
      
    a| Lewis Research Center.
    974
      
      
    b| UIU c| UIUC d| 20141113 s| google u| uiug.30112106779454 y| 1960 r| pd q| bib

Access online

Google Preview