Manual control of high-altitude Apollo launch abort
Simulation study of manual control capability for Apollo spacecraft reentry orientation after high altitude launch abort using visual scene
REENTRY↗
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Results for “High Altitude”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The feasibility of identifying forest species and delineating major timber types in California by means of high altitude small scale aerial photography Annual progress report
Optimum photographic specifications for forest species identification on high altitude aerial photographs
AERIAL PHOTOGRAPHY↗
High altitude limitation study advanced horizon sensor for OGO Final report, 4 Apr. - 15 Jul. 1966
High-altitude or small-earth limitations for advanced horizon sensor of Orbiting Geophysical Observatory /OGO-A/
SATELLITE ATTITUDE CONTROL↗
High-altitude explosion properties of the hydrogen-oxygen system in vented tanks.
Hydrogen-oxygen system high altitude explosion properties in vented tanks, discussing explosion hazard
Kaye, S.↗
Infrared reflectance of high altitude clouds
IR reflectance of cirrostratus and cirrus clouds and jet contrail measured by spectrometer on high altitude aircraft
Blaine, L. R.↗
A new thermal and trajectory model for high altitude balloons
A new computer model for the prediction of the trajectory and thermal behavior of high altitude balloons has been developed. In accord with flight data, the model permits radiative emission and absorption of the lifting gas and daytime gas temperatures above that of the balloon film. It also includes ballasting, venting, and valving. Predictions obtained with the model are compared with flight data and newly discovered features are discussed.
Carlson, L. A.↗
Radiation Physics for Space and High Altitude Air Travel
Galactic cosmic rays (GCR) are of extra-solar origin consisting of high-energy hydrogen, helium, and heavy ions. The GCR are modified by physical processes as they traverse through the solar system, spacecraft shielding, atmospheres, and tissues producing copious amounts of secondary radiation including fragmentation products, neutrons, mesons, and muons. We discuss physical models and measurements relevant for estimating biological risks in space and high-altitude air travel. Ambient and internal spacecraft computational models for the International Space Station and a Mars mission are discussed. Risk assessment is traditionally based on linear addition of components. We discuss alternative models that include stochastic treatments of columnar damage by heavy ion tracks and multi-cellular damage following nuclear fragmentation in tissue.
Cucinotta, F. A.↗
Dual Wavelength Lidar Observation of Tropical High-Altitude Cirrus Clouds During the ALBATROSS 1996 Campaign
Dual wavelength aerosol lidar observations of tropical high-altitude cirrus clouds were performed during the ALBATROSS 1996 campaign aboard the research vessel POLARSTERN on the Atlantic ocean in October-November 1996.
Lidar Observations Tropical Cirrus Clouds ALBATROS↗
Team dynamics in isolated, confined environments - Saturation divers and high altitude climbers
The effects of leadership dynamics and social organization factors on team performance under conditions of high altitude climbing and deep sea diving are studied. Teams of two to four members that know each other well and have a relaxed informal team structure with much sharing of responsibilities are found to do better than military teams with more than four members who do not know each other well and have a formal team structure with highly specialized rules. Professionally guided teams with more than four members, a formally defined team structure, and clearly designated role assignments did better than 'club' teams of more than four members with a fairly informal team structure and little role specialization.
Kanki, Barbara G.↗
The impact of high altitude aircraft on the ozone layer in the stratosphere
The paper discusses the potential effects on the ozone layer of gases released by the engines of proposed high altitude supersonic aircraft. The major problem arises from the emissions of nitrogen oxides which have the potential to destroy significant quantities of ozone in the stratosphere. The magnitude of the perturbation is highly dependent on the cruise altitude of the aircraft. Furthermore, the depletion of ozone is substantially reduced when heterogeneous conversion of nitrogen oxides into nitric acid on sulfate aerosol particles is taken into account in the calculation. The sensitivity of the aerosol load on stratospheric ozone is investigated. First, the model indicates that the aerosol load induced by the SO2 released by aircraft is increased by about 10-20% above the background aerosols at mid-high latitude of the Northern Hemisphere at 15 km for the NASA emission scenario A (the NASA emission scenarios are explained in Tables I to III). This increase in aerosol has small effects on stratospheric ozone. Second, when the aerosol load is increased following a volcanic eruption similar to the eruption of El Chichon (Mexico, April 1982), the ozone column in spring increases by as much as 9% in response to the injection of NOx from the aircraft with the NASA emission scenario A. Finally, the modeled suggests that significant ozone depletion could result from the formation of additional polar stratospheric clouds produced by the injection of H2O and HNO3 by the aircraft engines.
Tie, Xue XI↗
Detection and study of microbial population in upper atmosphere. simulated high altitude microbial sampling with an electrostatic precipitator
Detection and study of microbial population in upper atmosphere - simulated high altitude sampling with electrostatic precipitator
UPPER ATMOSPHERE↗
Production of a high altitude land use map and data base for Boston Interim report, Jun. - Dec. 1970
Production of a high altitude urban land use map and data base for Boston sector of megalopolis
Simpson, R. B.↗
Design definition of a microwave power reception and conversion system for use on a high altitude powered platform
The design definition of a microwave power reception and conversion system for use on high altitude powered platform is presented. The study includes an initial design, construction and test effort on a thin film, printed circuit rectenna. A study of a low altitude demonstration of an airborne rectenna was made starting with the assumption that a fifty foot mechanically steerable parabolic reflector at the Wallops Flight Center would be retrofitted with a low microwave power source consisting of a five kilowatt commercially available magnetron and that a small blimp would be used to support the rectenna.
W. C. Brown↗
Parametric study of microwave-powered high-altitude airplane platforms designed for linear flight
The performance of a class of remotely piloted, microwave powered, high altitude airplane platforms is studied. The first part of each cycle of the flight profile consists of climb while the vehicle is tracked and powered by a microwave beam; this is followed by gliding flight back to a minimum altitude above a microwave station and initiation of another cycle. Parametric variations were used to define the effects of changes in the characteristics of the airplane aerodynamics, the energy transmission systems, the propulsion system, and winds. Results show that wind effects limit the reduction of wing loading and the increase of lift coefficient, two effective ways to obtain longer range and endurance for each flight cycle. Calculated climb performance showed strong sensitivity to some power and propulsion parameters. A simplified method of computing gliding endurance was developed.
Morris, C. E. K., Jr.↗
Science requirements and feasibility/design studies of a very-high-altitude aircraft for atmospheric research
The advantages and shortcomings of currently available aircraft for use in very high altitude missions to study such problems as polar ozone or stratosphere-troposphere exchange pose the question of whether to develop advanced aircraft for atmospheric research. To answer this question, NASA conducted a workshop to determine science needs and feasibility/design studies to assess whether and how those needs could be met. It was determined that there was a need for an aircraft that could cruise at an altitude of 30 km with a range of 6,000 miles with vertical profiling down to 10 km and back at remote points and carry a payload of 3,000 lbs.
Russell, Philip B.↗
Red Sprites and Blue Jets: Initial Observations of High Altitude Atmospheric Flashes above Thunderstorms from the Sprites Campaign
This video presentation provides the initial observations of high altitude atmospheric flashes above thunderstorms from the SPRITE upper atmospheric optical emissions campaign.
Source record↗
Aerodynamic Design of a Propeller for High-Altitude Balloon Trajectory Control
The aerodynamic design of a propeller for the trajectory control of a high-altitude, scientific balloon has been performed using theoretical methods developed especially for such applications. The methods are described. Optimum, nonlinear chord and twist distributions have been developed in conjunction with the design of a family of airfoils, the SE403, SE404, and SE405, for the propeller. The very low Reynolds numbers along the propeller blade fall in a range that has yet to be rigorously investigated, either experimentally or theoretically.
Eppler, Richard↗
Daily summary for IMS high-altitude satellites, days 1-181 1977
A description of the orbital positions is provided for a number of high altitude satellites capable of making magnetospheric measurements in the first half of 1977 as part of the International Magnetospheric Study (IMS). Six artificial satellites -- Vela 5B, IMP-H, IMP-J, Solrad 11A, Solrad 11B, and Hawkeye 1 -- have been chosen along with the moon. The daily position summary of the satellites includes data tables which provide the crossing times of the bow shock and magnetopause, as well as the entry and exit times from the cusp, the high latitude tail, the midlatitude tail, and the neutral sheet region.
Source record↗