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Author: Douglas Aircraft Company Publisher: ISBN: Category : Languages : en Pages : 51
Book Description
Four model atmospheres for the planet Mars are presented for use in engineering studies. Three are for a molecular weight of 28.0 with surface pressures of 85, 162, and 37 millibars. They are representative of mean, maximum, and minimum conditions, respectively. The fourth model is for a molecular weight of 32.8 with a surface pressure of 37 millibars, representing extreme minimum conditions. These models indicate the expected numerical range of the thermodynamic variables pressure, temperature, and density - to be encountered in the Martian atmosphere from 0 to 400 kilometers (1,312,300 ft) during the 11 year solar cycle, 1975-1985. The extreme atmospheric models are not artificial envelopes of all possible combinations, but represent physical conditions which may actually exist on Mars. (Author).
Author: Douglas Aircraft Company Publisher: ISBN: Category : Languages : en Pages : 51
Book Description
Four model atmospheres for the planet Mars are presented for use in engineering studies. Three are for a molecular weight of 28.0 with surface pressures of 85, 162, and 37 millibars. They are representative of mean, maximum, and minimum conditions, respectively. The fourth model is for a molecular weight of 32.8 with a surface pressure of 37 millibars, representing extreme minimum conditions. These models indicate the expected numerical range of the thermodynamic variables pressure, temperature, and density - to be encountered in the Martian atmosphere from 0 to 400 kilometers (1,312,300 ft) during the 11 year solar cycle, 1975-1985. The extreme atmospheric models are not artificial envelopes of all possible combinations, but represent physical conditions which may actually exist on Mars. (Author).
Author: Robert M. Haberle Publisher: Cambridge University Press ISBN: 110817938X Category : Science Languages : en Pages : 613
Book Description
Humanity has long been fascinated by the planet Mars. Was its climate ever conducive to life? What is the atmosphere like today and why did it change so dramatically over time? Eleven spacecraft have successfully flown to Mars since the Viking mission of the 1970s and early 1980s. These orbiters, landers and rovers have generated vast amounts of data that now span a Martian decade (roughly eighteen years). This new volume brings together the many new ideas about the atmosphere and climate system that have emerged, including the complex interplay of the volatile and dust cycles, the atmosphere-surface interactions that connect them over time, and the diversity of the planet's environment and its complex history. Including tutorials and explanations of complicated ideas, students, researchers and non-specialists alike are able to use this resource to gain a thorough and up-to-date understanding of this most Earth-like of planetary neighbours.
Author: Roger Daley Publisher: Cambridge University Press ISBN: 9780521458252 Category : Science Languages : en Pages : 480
Book Description
Intended to fill a void in the atmospheric science literature, this self-contained text outlines the physical and mathematical basis of all aspects of atmospheric analysis as well as topics important in several other fields outside of it, including atmospheric dynamics and statistics.
Author: Publisher: ISBN: Category : Languages : en Pages : 177
Book Description
This study examines the effects of atmospheric drag on the long term orbital motion of an artificial satellite about the planet Mars using a dynamic Martian atmosphere model instead of a static atmosphere model. Present studies of motion through the Martian atmosphere use a non-rotating (static) atmosphere model which has a simple exponential drop-off with altitude. However, Mars, like other planets, is known to have a turbulent, complex atmosphere. As a result, a new dynamic model of the Martian atmosphere uses data from recent space probes of Mars to simulate an atmosphere that is both position dependent, through latitude and longitude effects, and time dependent, through a variety of effects. These include diurnal and seasonal effects, annual motion effects, solar activity effects, and dust storm effects. Nine constituent gases are included in the above model. The model determines atmospheric mass density for the calculation of atmospheric drag. The existing static model is also used to calculate atmospheric drag to provide a comparison in conjunction with other effects. In addition to atmospheric drag, perturbations due to the attraction of the sun, the aspherical gravity field of Mars, and the effects of the solar wind are also modeled. The resulting orbital data are then compared to determine the differences between the two models, thus showing the effects on long term motion of using a dynamic model of the Martian atmosphere. Theses.
Author: Nadine Barlow Publisher: Cambridge University Press ISBN: 9781107644878 Category : Science Languages : en Pages : 0
Book Description
Our knowledge of Mars has changed dramatically in the past 40 years due to the wealth of information provided by Earth-based and orbiting telescopes, and spacecraft investigations. Recent observations suggest that water has played a major role in the climatic and geologic history of the planet. This textbook covers our understanding of the planet's formation, geology, atmosphere, interior, surface properties, and potential for life. This interdisciplinary textbook encompasses the fields of geology, chemistry, atmospheric sciences, geophysics, and astronomy. Each chapter introduces the necessary background information to help the non-specialist understand the topics explored. It includes results from missions through 2006, including the latest insights from Mars Express and the Mars Exploration Rovers. Containing the most up-to-date information on Mars, this textbook is essential reading for graduate courses, and an important reference for researchers.
Author: National Aeronautics and Space Adm Nasa Publisher: Independently Published ISBN: 9781723737961 Category : Science Languages : en Pages : 36
Book Description
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
Author: Shaun Lovejoy Publisher: Cambridge University Press ISBN: 1107018986 Category : Nature Languages : en Pages : 509
Book Description
A new method of modeling the atmosphere, synthesizing data analysis techniques and multifractal statistics, for atmospheric researchers and graduate students.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781723200250 Category : Languages : en Pages : 196
Book Description
This is a programmer's guide for the Mars Global Reference Atmospheric Model (Mars-GRAM 3.34). Included are a brief history and review of the model since its origin in 1988 and a technical discussion of recent additions and modifications. Examples of how to run both the interactive and batch (subroutine) forms are presented. Instructions are provided on how to customize output of the model for various parameters of the Mars atmosphere. Detailed descriptions are given of the main driver programs, subroutines, and associated computational methods. Lists and descriptions include input, output, and local variables in the programs. These descriptions give a summary of program steps and 'map' of calling relationships among the subroutines. Definitions are provided for the variables passed between subroutines through common lists. Explanations are provided for all diagnostic and progress messages generated during execution of the program. A brief outline of future plans for Mars-GRAM is also presented. Justus, C. G. and James, Bonnie F. and Johnson, Dale L. Marshall Space Flight Center ATMOSPHERIC MODELS; USER MANUALS (COMPUTER PROGRAMS); MARS ATMOSPHERE; COMPUTER PROGRAMMING; MARS (PLANET); PLANETARY METEOROLOGY; SUBROUTINES; BATCH PROCESSING; COMPUTER PROGRAMS...
Author: Douglas Aircraft Company
Author: Douglas Aircraft Company
Author: Robert M. Haberle
Author: United States. National Aeronautics and Space Administration
Author: Roger Daley
Author: 
Author: Nadine Barlow
Author: National Aeronautics and Space Adm Nasa
Author: Shaun Lovejoy
Author: Zoltan L. Farago (CAPT, USAF.)
Author: National Aeronautics and Space Administration (NASA)