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Mars Global Reference Atmospheric Model 2001 Version (Mars-Gram 2001)

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-08-20

Total Pages: 66

ISBN-13: 9781720620143

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This document presents Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001) and its new features. As with the previous version (mars-2000), all parameterizations fro temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and season (Ls) use input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric General Circulation Model (MTGCM) for 80 to 70 km. Mars-GRAM 2001 is based on topography from the Mars Orbiter Laser Altimeter (MOLA) and includes new MGCM data at the topographic surface. A new auxiliary program allows Mars-GRAM output to be used to compute shortwave (solar) and longwave (thermal) radiation at the surface and top of atmosphere. This memorandum includes instructions on obtaining Mars-GRAN source code and data files and for running the program. It also provides sample input and output and an example for incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code.Justus, C. G. and Johnson, D. L.Marshall Space Flight CenterMARS ATMOSPHERE; ATMOSPHERIC GENERAL CIRCULATION MODELS; MARS SURFACE; PARAMETERIZATION; ATMOSPHERIC MODELS; ATMOSPHERIC CIRCULATION; TOPOGRAPHY; THERMOSPHERE; LONG WAVE RADIATION; TRAJECTORIES

Book Synopsis Mars Global Reference Atmospheric Model 2001 Version (Mars-Gram 2001) by : National Aeronautics and Space Administration (NASA)

Download or read book Mars Global Reference Atmospheric Model 2001 Version (Mars-Gram 2001) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001) and its new features. As with the previous version (mars-2000), all parameterizations fro temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and season (Ls) use input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric General Circulation Model (MTGCM) for 80 to 70 km. Mars-GRAM 2001 is based on topography from the Mars Orbiter Laser Altimeter (MOLA) and includes new MGCM data at the topographic surface. A new auxiliary program allows Mars-GRAM output to be used to compute shortwave (solar) and longwave (thermal) radiation at the surface and top of atmosphere. This memorandum includes instructions on obtaining Mars-GRAN source code and data files and for running the program. It also provides sample input and output and an example for incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code.Justus, C. G. and Johnson, D. L.Marshall Space Flight CenterMARS ATMOSPHERE; ATMOSPHERIC GENERAL CIRCULATION MODELS; MARS SURFACE; PARAMETERIZATION; ATMOSPHERIC MODELS; ATMOSPHERIC CIRCULATION; TOPOGRAPHY; THERMOSPHERE; LONG WAVE RADIATION; TRAJECTORIES

MARS GLOBAL REFERENCE ATMOSPHERIC MODEL 2001 VERSION (MARS-GRAM 2001): USERS GUIDE... NASA/TM-2001-210961... AUG. 16, 2001

Author:

Publisher:

Published: 2002

Total Pages:

ISBN-13:

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Book Synopsis MARS GLOBAL REFERENCE ATMOSPHERIC MODEL 2001 VERSION (MARS-GRAM 2001): USERS GUIDE... NASA/TM-2001-210961... AUG. 16, 2001 by :

Download or read book MARS GLOBAL REFERENCE ATMOSPHERIC MODEL 2001 VERSION (MARS-GRAM 2001): USERS GUIDE... NASA/TM-2001-210961... AUG. 16, 2001 written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001): Users Guide

Author: Carl Gerald Justus

Publisher:

Published: 2001

Total Pages: 68

ISBN-13:

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Book Synopsis Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001): Users Guide by : Carl Gerald Justus

Download or read book Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001): Users Guide written by Carl Gerald Justus and published by . This book was released on 2001 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model (Mars-Gram) Version 3.8: Users Guide

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-09-16

Total Pages: 36

ISBN-13: 9781723737961

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Mars Global Reference Atmospheric Model (Mars-GRAM) Version 3.8 is presented and its new features are discussed. Mars-GRAM uses new values of planetary reference ellipsoid radii, gravity term, and rotation rate (consistent with current JPL values) and includes centrifugal effects on gravity. The model now uses NASA Ames Global Circulation Model low resolution topography. Curvature corrections are applied to winds and limits based on speed of sound are applied. Altitude of the F1 ionization peak and density scale height, including effects of change of molecular weight with altitude are computed. A check is performed to disallow temperatures below CO2 sublimination. This memorandum includes instructions on obtaining Mars-GRAM source code and data files and running the program. Sample input and output are provided. An example of incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code is also given.Justus, C. G. and James, B. F.Marshall Space Flight CenterMARS (PLANET); MARS ATMOSPHERE; ATMOSPHERIC TEMPERATURE; ATMOSPHERIC MODELS; ATMOSPHERIC DENSITY; SUBROUTINES; USER MANUALS (COMPUTER PROGRAMS); COMPUTER AIDED TOMOGRAPHY; TOPOGRAPHY

Book Synopsis Mars Global Reference Atmospheric Model (Mars-Gram) Version 3.8: Users Guide by : National Aeronautics and Space Adm Nasa

Download or read book Mars Global Reference Atmospheric Model (Mars-Gram) Version 3.8: Users Guide written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-16 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mars Global Reference Atmospheric Model (Mars-GRAM) Version 3.8 is presented and its new features are discussed. Mars-GRAM uses new values of planetary reference ellipsoid radii, gravity term, and rotation rate (consistent with current JPL values) and includes centrifugal effects on gravity. The model now uses NASA Ames Global Circulation Model low resolution topography. Curvature corrections are applied to winds and limits based on speed of sound are applied. Altitude of the F1 ionization peak and density scale height, including effects of change of molecular weight with altitude are computed. A check is performed to disallow temperatures below CO2 sublimination. This memorandum includes instructions on obtaining Mars-GRAM source code and data files and running the program. Sample input and output are provided. An example of incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code is also given.Justus, C. G. and James, B. F.Marshall Space Flight CenterMARS (PLANET); MARS ATMOSPHERE; ATMOSPHERIC TEMPERATURE; ATMOSPHERIC MODELS; ATMOSPHERIC DENSITY; SUBROUTINES; USER MANUALS (COMPUTER PROGRAMS); COMPUTER AIDED TOMOGRAPHY; TOPOGRAPHY

Mars Global Reference Atmospheric Model (Mars-GRAM) Version 3.8: Users Guide

Author: Carl Gerald Justus

Publisher:

Published: 1999

Total Pages: 36

ISBN-13:

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Book Synopsis Mars Global Reference Atmospheric Model (Mars-GRAM) Version 3.8: Users Guide by : Carl Gerald Justus

Download or read book Mars Global Reference Atmospheric Model (Mars-GRAM) Version 3.8: Users Guide written by Carl Gerald Justus and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model 2010

Author: National Aeronautics and Space Administration

Publisher: Createspace Independent Publishing Platform

Published: 2017-01-17

Total Pages: 94

ISBN-13: 9781542596251

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The Mars Global Reference Atmospheric Model (Mars-GRAM) is an engineering-level atmospheric model widely used for diverse mission applications. Applications include systems design, performance analysis, and operations planning for aerobraking, entry, descent and landing, and aerocapture. Mars-GRAM has been utilized during the aerobraking operations of Mars Global Surveyor (MGS),1 Mars Odyssey (ODY), and Mars Reconnaissance Orbiter (MRO). Mars- GRAM has also been used in the prediction and validation of Mars Pathfinder hypersonic aerodynamics, 2 the aerothermodynamic and entry dynamics studies for Mars Polar Lander,3 the Mars Aerocapture System Study, as well as the Aerocapture Technology Assessment Group. Mars-GRAM versions4-8 prior to Mars-GRAM 2000 were based on ad hoc parameterizations to data observed by the Mariner and Viking missions. Mars-GRAM 2000,9 Mars-GRAM 2001, Mars-GRAM 2005, and the current version, Mars-GRAM 2010, are based on input data tables derived from output results from the NASA Ames Mars General Circulation Model (MGCM)10,11 and the University of Michigan Mars Thermospheric General Circulation Model (MTGCM).12,13 Section 1 provides an overview of Mars-GRAM 2010. Section 2 of this Technical Memorandum describes the MGCM and MTGCM data and how they are applied in Mars-GRAM. The new features of Mars-GRAM 2010 are described in section 3. Section 4 explains how to obtain the Mars-GRAM code and data files and how to set up and run the program. Sample results are presented in section 5. Appendices A-F provide additional details of Mars-GRAM 2010 input and output files and how to interpret program results. Appendix G describes several auxiliary programs that are provided with Mars-GRAM 2010.

Book Synopsis Mars Global Reference Atmospheric Model 2010 by : National Aeronautics and Space Administration

Download or read book Mars Global Reference Atmospheric Model 2010 written by National Aeronautics and Space Administration and published by Createspace Independent Publishing Platform. This book was released on 2017-01-17 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mars Global Reference Atmospheric Model (Mars-GRAM) is an engineering-level atmospheric model widely used for diverse mission applications. Applications include systems design, performance analysis, and operations planning for aerobraking, entry, descent and landing, and aerocapture. Mars-GRAM has been utilized during the aerobraking operations of Mars Global Surveyor (MGS),1 Mars Odyssey (ODY), and Mars Reconnaissance Orbiter (MRO). Mars- GRAM has also been used in the prediction and validation of Mars Pathfinder hypersonic aerodynamics, 2 the aerothermodynamic and entry dynamics studies for Mars Polar Lander,3 the Mars Aerocapture System Study, as well as the Aerocapture Technology Assessment Group. Mars-GRAM versions4-8 prior to Mars-GRAM 2000 were based on ad hoc parameterizations to data observed by the Mariner and Viking missions. Mars-GRAM 2000,9 Mars-GRAM 2001, Mars-GRAM 2005, and the current version, Mars-GRAM 2010, are based on input data tables derived from output results from the NASA Ames Mars General Circulation Model (MGCM)10,11 and the University of Michigan Mars Thermospheric General Circulation Model (MTGCM).12,13 Section 1 provides an overview of Mars-GRAM 2010. Section 2 of this Technical Memorandum describes the MGCM and MTGCM data and how they are applied in Mars-GRAM. The new features of Mars-GRAM 2010 are described in section 3. Section 4 explains how to obtain the Mars-GRAM code and data files and how to set up and run the program. Sample results are presented in section 5. Appendices A-F provide additional details of Mars-GRAM 2010 input and output files and how to interpret program results. Appendix G describes several auxiliary programs that are provided with Mars-GRAM 2010.

Mars Global Reference Atmospheric Model (Mars-GRAM): User Guide

Author: H. L. Justh

Publisher:

Published: 2021

Total Pages: 67

ISBN-13:

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Book Synopsis Mars Global Reference Atmospheric Model (Mars-GRAM): User Guide by : H. L. Justh

Download or read book Mars Global Reference Atmospheric Model (Mars-GRAM): User Guide written by H. L. Justh and published by . This book was released on 2021 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model (mars-gram) Version 3.8: Users Guide ... Nasa/tm-1999-209629 ... Nasa ... May 1999

Author:

Publisher:

Published: 2000

Total Pages:

ISBN-13:

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Book Synopsis Mars Global Reference Atmospheric Model (mars-gram) Version 3.8: Users Guide ... Nasa/tm-1999-209629 ... Nasa ... May 1999 by :

Download or read book Mars Global Reference Atmospheric Model (mars-gram) Version 3.8: Users Guide ... Nasa/tm-1999-209629 ... Nasa ... May 1999 written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000): Users Guide

Author: Carl Gerald Justus

Publisher:

Published: 2000

Total Pages: 56

ISBN-13:

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Book Synopsis Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000): Users Guide by : Carl Gerald Justus

Download or read book Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000): Users Guide written by Carl Gerald Justus and published by . This book was released on 2000 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mars Global Reference Atmospheric Model 2000 Version (Mars-Gram 2000)

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-06-03

Total Pages: 54

ISBN-13: 9781720620037

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This report presents Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000) and its new features. All parameterizations for temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and L(sub s) have been replaced by input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric General Circulation Model (MTGCM) for 80 to 170 km. A modified Stewart thermospheric model is still used for higher altitudes and for dependence on solar activity. "Climate factors" to tune for agreement with GCM data are no longer needed. Adjustment of exospheric temperature is still an option. Consistent with observations from Mars Global Surveyor, a new longitude-dependent wave model is included with user input to specify waves having 1 to 3 wavelengths around the planet. A simplified perturbation model has been substituted for the earlier one. An input switch allows users to select either East or West longitude positive. This memorandum includes instructions on obtaining Mars-GRAM source code and data files and for running the program. It also provides sample input and output and an example for incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code.Justus, C. G. and James, B. F.Marshall Space Flight CenterATMOSPHERIC GENERAL CIRCULATION MODELS; MARS ATMOSPHERE; MATHEMATICAL MODELS; TEMPERATURE; PRESSURE; DENSITY (MASS/VOLUME); WIND (METEOROLOGY); PARAMETERIZATION; LONGITUDE; TRAJECTORIES; THERMOSPHERE; TABLES (DATA); SUBROUTINES; SOLAR ACTIVITY; PERTURBATION; EXOSPHERE; ATMOSPHERIC MODELS; ATMOSPHERIC CIRCULATION

Book Synopsis Mars Global Reference Atmospheric Model 2000 Version (Mars-Gram 2000) by : National Aeronautics and Space Administration (NASA)

Download or read book Mars Global Reference Atmospheric Model 2000 Version (Mars-Gram 2000) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000) and its new features. All parameterizations for temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and L(sub s) have been replaced by input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric General Circulation Model (MTGCM) for 80 to 170 km. A modified Stewart thermospheric model is still used for higher altitudes and for dependence on solar activity. "Climate factors" to tune for agreement with GCM data are no longer needed. Adjustment of exospheric temperature is still an option. Consistent with observations from Mars Global Surveyor, a new longitude-dependent wave model is included with user input to specify waves having 1 to 3 wavelengths around the planet. A simplified perturbation model has been substituted for the earlier one. An input switch allows users to select either East or West longitude positive. This memorandum includes instructions on obtaining Mars-GRAM source code and data files and for running the program. It also provides sample input and output and an example for incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code.Justus, C. G. and James, B. F.Marshall Space Flight CenterATMOSPHERIC GENERAL CIRCULATION MODELS; MARS ATMOSPHERE; MATHEMATICAL MODELS; TEMPERATURE; PRESSURE; DENSITY (MASS/VOLUME); WIND (METEOROLOGY); PARAMETERIZATION; LONGITUDE; TRAJECTORIES; THERMOSPHERE; TABLES (DATA); SUBROUTINES; SOLAR ACTIVITY; PERTURBATION; EXOSPHERE; ATMOSPHERIC MODELS; ATMOSPHERIC CIRCULATION