Research related to measurements of atomic species in the earth's upper atmosphere Quarterly status report

Rocket and satellite borne mass spectrometer analysis of atomic oxygen density in earths upper atmospher

Research related to measurements of atomic species in the earth's upper atmosphere Quarterly report

Atomic-molecular oxygen ratio and recombination rates at upper atmospheric pressure

Research related to measurements of atomic species in the earth's upper atmosphere Quarterly status report, period ending 1 Sep. 1968

Interaction of oxygen atoms with solid surfaces for interpretation of mass spectrometer signals to determine composition of upper atmospher

Space shuttle main engine: Interactive design challenges

The operating requirements established by NASA for the SSME were considerably more demanding than those for earlier rocket engines used in the military launch vehicles or Apollo program. The SSME, in order to achieve the high performance, low weight, long life, reusable objectives, embodied technical demands far in excess of its predecessor rocket engines. The requirements dictated the use of high combustion pressure and the staged combustion cycle which maximizes performance through total use of all propellants in the main combustion process. This approach presented a myriad of technical challenges for maximization of performance within attainable state of the art capabilities for operating pressures, operating temperatures and rotating machinery efficiencies. Controlling uniformity of the high pressure turbomachinery turbine temperature environment was a key challenge for thrust level and life capability demanding innovative engineering. New approaches in the design of the components were necessary to accommodate the multiple use, minimum maintenance objectives. Included were the use of line replaceable units to facilitate field maintenance automatic checkout and internal inspection capabilities

Research related to measurements of atomic species in the earth's upper atmosphere Final report

Interaction kinetics of atomic oxygen and hydrogen on metal surfaces of satellite-borne mass spectrometer

Computer simulation incorporating a helicopter model for evaluation of aircraft avionics systems

A computer program was developed to integrate avionics research in navigation, guidance, controls, and displays with a realistic aircraft model. A user oriented program is described that allows a flexible combination of user supplied models to perform research in any avionics area. A preprocessor technique for selecting various models without significantly changing the memory storage is included. Also included are mathematical models for several avionics error models and for the CH-47 helicopter used in this program

Reverse engineering a spectrum: using fluorescent spectra of molecular hydrogen to recreate the missing Lyman-α line of pre-main sequence stars

The hydrogen Lyman-α (Lyα) line, a major source of ionization of metals in the circumstellar disks of pre-main sequence (PMS) stars, is usually not observed due to absorption by interstellar and circumstellar hydrogen. We have developed a technique to reconstruct the intrinsic Lyα line using the observed emission in the H2 B-X lines that are fluoresced by Lyα. We describe this technique and the subsequent analysis of the ultraviolet (UV) spectra of the TW Hya, RU Lupi and other PMS stars. We find that the reconstructed Lyα lines are indeed far brighter than any other feature in the UV spectra of these stars and therefore play an important role in the ionization and heating of the outer layers of circumstellar disks

Implications of microwave spectroscopy for the water-vapor content of the Venus atmosphere

Brightness temperature spectra of Venus computed to determine amount of water vapor in lower atmospher

Extreme distributions of ground winds /3 to 150 meters/ at Cape Kennedy, Florida

Statistical analysis of wind distribution probabilities at Cape Kenned