Aspects Of Parking Orbit Selection In A Manned Mars Mission
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Aspects Of Parking Orbit Selection In A Manned Mars Mission
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Author : Prasun N. Desai
language : en
Publisher:
Release Date : 1992
Aspects Of Parking Orbit Selection In A Manned Mars Mission written by Prasun N. Desai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Astrodynamics categories.
In this investigation, which considers precession effects, minimum initial LEO masses were obtained for parking orbits characterized by having near-equatorial inclinations, high eccentricities, and three-dimensional departure burns. Shows that there are a set of orbits characterized by low to moderate essentricities (e = 0.2 to 0.5) and nonequatorial inclinations (i = 70° to 140°) that reduce the initial LEO mass penalty. Therefore, careful selection of a parking orbit at Mars can enhance the potential for satisfying science requirements with minimal mass penalties.
Aspects Of Parking Orbit Selection In A Manned Mars Mission
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-10-22
Aspects Of Parking Orbit Selection In A Manned Mars Mission written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-22 with categories.
For any round-trip Mars mission, the selection of a parking orbit at Mars must consider the precession caused by the oblateness of the planet. This precession will affect the departure condition for Earth return and, therefore, the initial mass required in low Earth orbit (LEO). In this investigation, which considers precession effects, minimum initial LEO masses were obtained for parking orbits characterized by having near-equatorial inclinations, high eccentricities, and three-dimensional departure burns (i.e., a burn with an in-plane and an out-of-plane velocity increment component). However, because near-equatorial inclination orbits have poor planetary coverage characteristics, they are not desirable from a science viewpoint. To enhance the potential for satisfying science requirements along with landing site accessibility, a penalty in the initial LEO mass is required. This study shows that there are a set of orbits characterized by low to moderate essentricities (e = 0.2 to 0.5) and nonequatorial inclinations (i = 70 to 140 deg) that reduce this initial LEO mass penalty. Therefore, careful selection of a parking orbit at Mars can enhance the potential for satisfying science requirements with minimal mass penalties. Desai, Prasun N. and Braun, Robert D. and Powell, Richard W. Langley Research Center RTOP 506-49-11-01...
Aspects Of Parking Orbit Selection In A Manned Mars Mission
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Author : Prasun N. Desai
language : en
Publisher:
Release Date : 1990
Aspects Of Parking Orbit Selection In A Manned Mars Mission written by Prasun N. Desai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Human Mars Mission
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-31
Human Mars Mission written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-31 with categories.
The determination of orbital window characteristics is of major importance in the analysis of human interplanetary missions and systems. The orbital launch window characteristics are directly involved in the selection of mission trajectories, the development of orbit operational concepts, and the design of orbital launch systems. The orbital launch window problem arises because of the dynamic nature of the relative geometry between outgoing (departure) asymptote of the hyperbolic escape trajectory and the earth parking orbit. The orientation of the escape hyperbola asymptotic relative to earth is a function of time. The required hyperbola energy level also varies with time. In addition, the inertial orientation of the parking orbit is a function of time because of the perturbations caused by the Earth's oblateness. Thus, a coplanar injection onto the escape hyperbola can be made only at a point in time when the outgoing escape asymptote is contained by the plane of parking orbit. Even though this condition may be planned as a nominal situation, it will not generally represent the more probable injection geometry. The general case of an escape injection maneuver performed at a time other than the coplanar time will involve both a path angle and plane change and, therefore, a DELTA V penalty. Usually, because of the DELTA V penalty the actual departure injection window is smaller in duration than that determined by energy requirement alone. This report contains the formulation, characteristics, and test cases for five different launch window modes for Earth orbit. These modes are: (1) One impulsive maneuver from a Highly Elliptical Orbit (HEO) (2) Two impulsive maneuvers from a Highly Elliptical Orbit (HEO) (3) One impulsive maneuver from a Low Earth Orbit (LEO) (4) Two impulsive maneuvers from LEO (5) Three impulsive maneuvers from LEO.Young, ArchieMarshall Space Flight CenterLAUNCH WINDOWS; LOW EARTH ORBITS; MARS MISSIONS; ELLIPTICAL ORBITS; SPACECRAFT LAUNCHING; HY
Physiologically Constrained Aerocapture For Manned Mars Missions
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Author : James Evans Lyne
language : en
Publisher:
Release Date : 1992
Physiologically Constrained Aerocapture For Manned Mars Missions written by James Evans Lyne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1987
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Aeronautics categories.
A Selected Listing Of Nasa Scientific And Technical Reports For
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Author :
language : en
Publisher:
Release Date : 1960
A Selected Listing Of Nasa Scientific And Technical Reports For written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Aeronautics categories.
Nasa Technical Paper
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Author :
language : en
Publisher:
Release Date : 1990
Nasa Technical Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Science categories.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1993
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Government publications categories.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Nasa Technical Paper
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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1990
Nasa Technical Paper written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Aeronautics categories.