Orbital Construction of a NTR Mars Transfer Vehicle
This paper examines a reference Nuclear Thermal Mars Transfer Vehicle (NTMTV) in terms of on-orbit construction. The identification of subassemblies, payload manifesting, on-orbit connections,...
On-Orbit Robotics Assembly and Operations of a Nuclear Mars Transfer System
This paper presents an operations concept and associated scenarios for assembly in Earth orbit of a manned Mars vehicle. The assembly of a Rockwell-Spar reference spacecraft configuration...
Robotic On-Orbit Fueling of SEI Vehicles
Space Exploration Initiative (SEI) missions may involve the assembly and then fueling of vehicles in locations other than on the surface of the Earth. For example, fueling of the Mars...
The Initial Exploration of Mars: Rationale for a Return Mission to Chryse Planitia and the Viking 1 Lander
The concepts behind planning a landing site on Mars are discussed. Based on the engineering constraints and the scientific objectives which will likely be imposed on the first few missions...
Space-Based Assembly Sequence Formulation for Evaluation of Large Orbital Assemblies
The challenges associated with constructing interplanetary spacecraft and space platforms in low earth orbit are such that it is imperative that comprehensive, preliminary process planning...
Advances in Ground Operations for the Next Generation Space Launch Vehicle Programs
For over thirty years, large launch vehicles such as Saturn, Delta, Atlas, and Titan have successfully provided the world with access to space. The emphasis of each of those programs was...
Lunar Base Pressure, O2 Fraction, and ExtraHabitat Activity Suit Design
A major dilemma exists in determining optimum habitat and ExtraHabitat Activity (EHA) suit pressures for future space missions, balancing human safety requirements and the case of EHA...
Low Frequency Astronomy from Lunar Orbit
The Radio Astronomy Explorer satellite verified that the far-side of the Moon is well shielded from manmade and natural Earth-based interference at frequencies below 30 MHz. Above a few...
Multiple Booster Spaceports
Multiple Booster Spaceports examined launching an entire class of space boosters, both current and future, from a single spaceport. The United States presently launches four distinct classes...
Launch Facilities as Infrastructure
Many of the launch facilities in this country impose inefficiencies on launch service providers due to the way they have been constructed. To improve launch operation efficiency and to...
Reappraising the Space Shuttle Program
This paper argues that the experience of the Space Shuttle program has been misinterpreted. Conventional wisdom holds that the shuttle is an example of a weak national commitment. This...
The Wide-Angle Optoelectronic Stereo Scanner WAOSS for the Soviet Mars 94/96 Missions
The Wide-Angle Optoelectronic Stereo Scanner WAOSS is anticipated for the Soviet Mars 94/96 missions. Starting from the tasks of WAOSS as a part of the TV complex ARGUS, the paper describes...
In-Flight Calibration of Mass Spectrometer
A new device for in-flight calibration of mass spectrometer is presented. At a ground station command the calibrator introduces a constant and reproducible amount of deuterium into the...
The German Participation in the Soviet MARS 94/96 Mission
The German contribution to the science program of the Soviet MARS 94/96 missions includes 14 experiments or experiment, participations to be placed on the various mission elements: the...
Object Oriented Spacecraft Architecture
This paper describes an architecture for simplifying the spacecraft design and maintenance process: Object Oriented Spacecraft Architecture. Like object oriented programming, the strategy...
The Design and Use of Flow-Through Hold Pads
The Chicago Delay Task Force recommended the construction of nine largescale, flow-through hold pads at Chicago O'Hare International Airport to reduce the potential for airfield gridlock....
Aircraft Noise Monitoring at Denver International Airport
This paper describes design of the noise monitoring system for Denver International Airport. When the airport opens in 1993, the system must monitor compliance with two standards established...
Design Considerations for Multi-Wheel Aircraft
The available test data for performance of flexible pavements were analyzed using the Boussinesq and elastic layered theories. It was shown that strain criteria could be developed for...
Studies Related to Aircraft/Runway Friction Performance
Gaining a better understanding of the many factors influencing the tire/runway friction interface is the aim of several ongoing NASA Langley research programs. Results from studies conducted...
The Army Aviation Team from a Military Civil Engineer's Perspective
The Technical Session for which this paper is written is 'Airfield Pavements - A Team Effort.' As such, the emphasis on this paper is the United States Army Aviation Team, and not the...
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