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0.0
Aug 24, 2016
08/16
Aug 24, 2016
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NASA Technical Reports Server (NTRS)
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Hover and forward flight tests were conducted to investigate the mutual aerodynamic interaction between the main motor and fuselage of a conventional helicopter configuration. A 0.15-scale Model 222 two-bladed teetering rotor was combined with a 0.15-scale model of the NASA Ames 40x80-foot wind tunnel 1500 horsepower test stand fairing. Configuration effects were studied by modifying the fairing to simulate a typical helicopter forebody. Separation distance between rotor and body were also...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC INTERFERENCE, AIRCRAFT CONFIGURATIONS, FUSELAGES,...
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0.0
Aug 24, 2016
08/16
Aug 24, 2016
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NASA Technical Reports Server (NTRS)
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Various solar physical data are presented including: data for January 1984--(solar radio bursts af fixed frequencies, solar X-ray radiation from GOES satellite, Mass ejections from the sun); data for August 1981--solar flares; Miscellaneous data--(meudon carte synoptique, solar X-ray radiation from GOES satellite).
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, SOLAR RADIO BURSTS, SOLAR X-RAYS, GOES...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A ground vibration test was conducted on an F-16 airplane loaded on each wing with a 370-gal tank mounted on a standard pylon, a GBU-8 store mounted on a decoupler pylon, and an AIM-9J missile mounted on a wing-tip launcher. The decoupler pylon is a passive wing/store flutter-suppression device. The test was conducted prior to initial flight tests to determine the modal frequencies, mode shapes, and structural damping coefficients. The data presented include frequency response plots, force...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC CONFIGURATIONS, DYNAMIC STRUCTURAL ANALYSIS, F-16...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A total of 142 shadowgraph photographs were taken on 43 different plumes that were distributed over the six nozzle configurations using the 9.5 inch diameter collimated light beam of the shadowgraph setup. Aerodynamic flow conditions of the shadowgraph test points, the location and identification of each of the photographs, and copies of the pictures are presented.
Topics: NASA Technical Reports Server (NTRS), ANECHOIC CHAMBERS, CONVERGENT-DIVERGENT NOZZLES, FLOW...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Mean velocity (axial component) and turbulent velocity (axial component) measurements for thirty one selected flow conditions of six models were performed employing the Laser Doppler Velocimeter Aerodynamic conditions which define the test points are given. Tabulations which explain the scope of mean velocity traverses and turbulence histogram measurements are also presented. The actual LV position, the type of traverse, and measured mean and turbulent velocities along copies of the LV mean...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC CHARACTERISTICS, FLOW VELOCITY, LASER DOPPLER...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The model nozzle configurations, acoustic test conditions, and detailed test results from the hot static and simulated flight acoustic tests at the General Electric Anechoc Chamber are described.
Topics: NASA Technical Reports Server (NTRS), CONVERGENT-DIVERGENT NOZZLES, FLIGHT SIMULATION, NOISE...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The development of an engineering prototype of a life support system is discussed. The module consists of an electrocardiogram, a defibrillator, a resuscitator, and an aspirator, as well as body temperature and blood pressure measuring instruments. A drug kit is included.
Topics: NASA Technical Reports Server (NTRS), LIFE SUPPORT SYSTEMS, MODULES, BLOOD PRESSURE, BODY...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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Results of the ASTRO-1 preliminary design review coupled loads analysis are presented. The M6.0Y Generic Shuttle mathematical models were used. Internal accelerations, interface forces, relative displacements, and net e.g., accelerations were recovered for two ASTRO-1 payloads in a tandem configuration. Twenty-seven load cases were computed and summarized. Load exceedences were found and recommendations made.
Topics: NASA Technical Reports Server (NTRS), COUPLED MODES, LOADS (FORCES), SPACE SHUTTLE PAYLOADS, SPACE...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The large space structures technology development missions to be performed on an early manned space station was studied and defined and the resources needed and the design implications to an early space station to carry out these large space structures technology development missions were determined. Emphasis is being placed on more detail in mission designs and space station resource requirements.
Topics: NASA Technical Reports Server (NTRS), LARGE SPACE STRUCTURES, PROJECT MANAGEMENT, SCHEDULING, SPACE...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Experiments were conducted with elemental nickel sliding on aluminum oxide in aerated sulfuric acid in concentrations ranging from very dilute (10 -4 N, i.e., 5 ppm) to very concentrated (96 percent) acid. Load and reciprocating sliding speeds were kept constant. With the most dilute concentration (10 -4 N) no observable corrosion occurred in or outside the wear area. This was used as the base condition to determine the high contribution of corrosion to total wear loss at acid concentrations...
Topics: NASA Technical Reports Server (NTRS), CORROSION, METAL SURFACES, NICKEL, SLIDING FRICTION, SULFURIC...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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An atlas of CH4 lines between 700 and 5,500 cm(-1) obtained from long-path-length samples at 296 K is presented. Many of the line centers are marked and their positions tabulated.
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC COMPOSITION, METHANE, MOLECULAR SPECTRA, GRAPHS...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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Topics: NASA Technical Reports Server (NTRS), GEOPHYSICS, IONOSPHERIC DISTURBANCES, SOLAR ACTIVITY, SOLAR...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The effects of free-stream unit Reynolds number, angle of attack, and nose shape on the aerothermal environment of a 3-ft basediameter, 12.5 deg half-angle cone were investigated in the Langley 8-foot high temperature tunnel at Mach 6.7. The average total temperature was 3300 R, the freestream unit Reynolds number ranged from 400,000 to 1,400,000 per foot, and the angle of attack ranged from 0 deg to 10 deg. Three nose configurations were tested on the cone: a 3-in-radius tip, a 1-in-radius tip...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC HEATING, BOUNDARY LAYER TRANSITION, CONES, FLOW...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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Data pertinent to the launching of space probes, soundings rockets, and satellites presented in tables include launch date, time, and site; agency rocket identification; sponsoring country or countries; instruments carried for experiments; the peak altitude achieved by the rockets; and the apoapsis and periapsis for satellites. The experimenter or institution involved in the launching is also cited.
Topics: NASA Technical Reports Server (NTRS), ROCKET LAUNCHING, ROCKET-BORNE INSTRUMENTS, SATELLITE-BORNE...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A series of computations was made to produce the equilibrium temperature and gas composition for ASTM jet A fuel and dry air. The computed tables and figures provide combustion gas property data for pressures from 0.5 to 50 atmospheres and equivalence ratios from 0 to 2.0.
Topics: NASA Technical Reports Server (NTRS), COMBUSTION PRODUCTS, FUEL COMBUSTION, GAS COMPOSITION, GASES,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A climatology of ozone for altitudes from FL190 to FL590 (19,000 to 59,000 ft) is presented. Climatological tables are given in two appendixes: one with d deg latitude resolution on a monthly basis, and one with 10 deg latitude resolution on a seasonal basis. Data were taken from 11,472 balloon-borne ozonesondes launched at 60 stations from 1963 to 1980 and from over 160,000 observations made by the Global Atmospheric Sampling Program on 4417 commercial airliner flights from 1975 to 1979. Case...
Topics: NASA Technical Reports Server (NTRS), CLIMATOLOGY, DATA ACQUISITION, DATA CORRELATION, GLOBAL AIR...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The noise source caused by the interaction of the rotor tip flow irregularities (vortices and velocity defects) with the downstream stator vanes was studied. Fan flow was removed behind a 0.508 meter (20 in.) diameter model turbofan through an outer wall slot between the rotor and stator. Noise measurements were made with far-field microphones positioned in an arc about the fan inlet and with a pressure transducer in the duct behind the stator. Little tone noise reduction was observed in the...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC NOISE, NOISE REDUCTION, ROTOR BLADES...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Magnetospherically attenuated, orbit integrated, surface incident cosmic ray fluxes of galactic origin were determined for the COBE mission. All heavy ions up to Nickel (z=28) were considered in this, evaluation. In order to provide worst case approximations, estimates were based on solar minimum conditions. Transport and material shielding calculations were then performed for these vehicle encountered particles, for a simple spherical 3-D aluminum geometry, and the materially attenuated cosmic...
Topics: NASA Technical Reports Server (NTRS), COSMIC RAYS, EXPOSURE, LINEAR ENERGY TRANSFER (LET), COSMIC...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
by
NASA Technical Reports Server (NTRS)
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The satellite orbit predictor is a graphical aid for determining the relationship between the satellite (SARSAT or COSPAS) orbit, antenna coverage of the spacecraft and coverage of the LUTs. The predictor allows the user to quickly visualize if a selected position will probably be detected and is composed of a base map and a satellite track overlay for each satellite. Additionally, a table of equator crossings for each satellite is included.
Topics: NASA Technical Reports Server (NTRS), COSPAS, SATELLITE ORBITS, SATELLITE TRACKING, SARSAT,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
by
NASA Technical Reports Server (NTRS)
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The satellite orbit predictor is a graphical aid for determining the relationship between the satellite (SARSAT or COSPAS) orbit, antenna coverage of the spacecraft and coverage of the LUTs. The predictor allows the user to quickly visualize if a selected position will probably be detected and is composed of a base map and a satellite track overlay for each satellite. Additionally, a table of equator crossings for each satellite is included.
Topics: NASA Technical Reports Server (NTRS), COSPAS, SARSAT, SATELLITE GROUND TRACKS, SATELLITE ORBITS,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Using the two nickel-manganese alloy electroforming baths of near identical compositions, panels were electroformed under the same deposition parameters of current density, bath temperature, pH, and pulse plating conditions of duty cycle and frequency. By changing the electrolyte agitation conditions, significant effects on mechanical properties were noted. Since electrolyte agitation conditions on the typical flat panels studied to date will not be identical to those existing on a complex...
Topics: NASA Technical Reports Server (NTRS), ELECTROFORMING, MANGANESE ALLOYS, MECHANICAL PROPERTIES,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The machine-readable finding list, as it is currently being distributed from the Astronomical Data Center, is described. This version of the list supersedes an earlier one (1977) containing only Sections 1 through 7 of the NSRDS-NBS 3 multiplet tables publications. Additional sections are to be incorporated into this list as they are published.
Topics: NASA Technical Reports Server (NTRS), ARTIFICIAL INTELLIGENCE, DOCUMENTATION, FINE STRUCTURE, LINE...
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1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A detailed description of the machine-readable astronomical catalog as it is currently being distributed from the Astronomical Data Center is given. Stellar motions and positions are listed herein in tabular form.
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, POSITION (LOCATION), STARS, STELLAR...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A three-dimensional laser Doppler anemometer (3D-LDA) was used in a wind tunnel to measure a jet in a crossflow. Measurements were made in the vicinity of a 5-cm-diam jet which issued normally into a 10.65 m/sec wind tunnel crossflow; the velocity ratio Vjet/Vinf was 8. Detailed lateral surveys were made at two elevations (z = cm and 2 cm); both elevations were within the region affected by the boundary layer on the plate. The results are believed to provide reliable velocity field information...
Topics: NASA Technical Reports Server (NTRS), LASER DOPPLER VELOCIMETERS, SIGNAL PROCESSING, TURBULENT...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Assessing the performance of a MOD-OA horizontal axis wind turbine connected to an isolated diesel utility, a comprehensive data measurement program was conducted on the Block Island Power Company installation on Block Island, Rhode Island. The detailed results of that program focusing on three principal areas of (1) fuel displacement (savings), (2) dynamic interaction between the diesel utility and the wind turbine, (3) effects of three models of wind turbine reactive power control are...
Topics: NASA Technical Reports Server (NTRS), COST REDUCTION, ENERGY CONVERSION EFFICIENCY, RHODE ISLAND,...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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In order to support analysis of the STS-6 advanced flexible reusable surface insulation (AFRSI) anomaly, data were obtained for aerodynamic and aeroacoustic environments in affected areas of the orbiter. Data are presented in tabular form.
Topics: NASA Technical Reports Server (NTRS), AEROACOUSTICS, AERODYNAMIC LOADS, PRESSURE DISTRIBUTION,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Results from the STS-13 (41-C) Shuttle entry flight are presented. The entry trajectory was reconstructed from an altitude of 700 kft through rollout on Runway 17 at EAFB. The anchor epoch utilized was April 13, 1984 13(h)1(m)30.(s)0 (46890(s).0) GMT. The final reconstructed inertial trajectory for this flight is BT13M23 under user catalog 169750N. Trajectory reconstruction and Extended BET development are discussed in Section 1 and 2, respectively. The NOAA totem-pole atmosphere extracted from...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC ENTRY, SPACE SHUTTLE MISSION 41-C, SPACE...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A survey of measuring devices or probes, which were used to investigate gas side fouling, was carried out. Five different types of measuring devices are identified and discussed including: heat flux meters, mass accumulation probes, optical devices, deposition probes, and acid condensation probes. A total of 32 different probes are described in detail and summarized in matrix or tabular form. The important considerations of combustion gas characterization and deposit analysis are also given a...
Topics: NASA Technical Reports Server (NTRS), FLUID MECHANICS, FOULING, FUELS, HEAT TRANSFER, MEASURING...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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On the basis of cycles 8 through 20, spanning about 143 years, observations of sunspot number, smoothed sunspot number, and their temporal properties were used to compute means, standard deviations, ranges, and frequency of occurrence histograms for a number of sunspot cycle parameters. The resultant schematic sunspot cycle was contrasted with the mean sunspot cycle, obtained by averaging smoothed sunspot number as a function of time, tying all cycles (8 through 20) to their minimum occurence...
Topics: NASA Technical Reports Server (NTRS), REGRESSION ANALYSIS, SOLAR ACTIVITY, SUN, SUNSPOT CYCLE,...
3
3.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Electron probe analysis was used to determine the chemical composition of microtektites discovered in the Central Pacific. An X-ray energy spectrum analysis was made, and the surface microstructure was investigated. The found microtektites appear to be younger than the microtektites reported in the Asia Australia Strewn Field.
Topics: NASA Technical Reports Server (NTRS), METEORITIC COMPOSITION, MICROMETEORITES, MINERALOGY, OCEAN...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A series of SEASAT repeat orbits over a sequence of best Low center positions is simulated by using the Seatrak satellite calculator. These Low centers are, upon appropriate interpolation to hourly positions, Located at various times during the + or - 3 hour assimilation cycle. Error analysis for a sample of best cyclone center positions taken from the Atlantic and Pacific oceans reveals a minimum average error of 1.1 deg of Longitude and a standard deviation of 0.9 deg of Longitude. The...
Topics: NASA Technical Reports Server (NTRS), CYCLONES, DATA INTEGRATION, DATA SIMULATION, ERROR ANALYSIS,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The aeroelastic phenomenon known as body-freedom flutter (BFF), a dynamic instability involving aircraft-pitch and wing-bending motions which, though rarely experienced on conventional vehicles, is characteristic of forward swept wing (FSW) aircraft was investigated. Testing was conducted in the Langley transonic dynamics tunnel on a flying, cable-mounted, 1/2-scale model of a FSW configuration with and without relaxed static stability (RSS). The BFF instability boundaries were found to occur...
Topics: NASA Technical Reports Server (NTRS), AEROELASTICITY, BENDING MOMENTS, FLUTTER ANALYSIS, PITCH...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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There is a dependence of TM output (proportional to scene radiance in a manner which will be discussed) upon season, upon cover type and upon view angle. The existence of a significant systematic variation across uniform scenes in p-type (radiometrically and geometrically pre-processed) data is demonstrated. Present pre-processing does remove the effects and the problem must be addressed because the effects are large. While this is in no way attributable to any shortcomings in the thematic...
Topics: NASA Technical Reports Server (NTRS), ANGULAR RESOLUTION, GEOMETRIC ACCURACY, IMAGE PROCESSING,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Tabulations are given of GASP ambient ozone mean, standard deviation, median, 84th percentile, and 98th percentile values, by month, flight level, and geographical region. These data are tabulated to conform to the temporal and spatial resolution required by FAA Advisory Circular 120-38 (monthly by 2000 ft in altitude by 5 deg in latitude) for climatological data used to show compliance with cabin ozone regulations. In addition seasonal x 10 deg latitude tabulations are included which are...
Topics: NASA Technical Reports Server (NTRS), OZONE, SPATIAL RESOLUTION, STANDARD DEVIATION, CLIMATOLOGY,...
3
3.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A hover test of a full-scale, hingeless rotor system was conducted in the NASA Ames 40- by 80-foot wind tunnel. The rotor was tested on the Ames rotor test apparatus. Rotor aeroelastic stability, performance, and loads at various rotational speeds and thrust coefficients were investigated. The primary objective was to determine the inplane stability characteristics of the rotor system. Rotor inplane damping data were obtained for operation between 350 and 425 rpm (design speed), and for thurst...
Topics: NASA Technical Reports Server (NTRS), AEROELASTICITY, DYNAMIC STABILITY, HELICOPTER DESIGN,...
2
2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A wing-body-canard configuration was tested at a Mach number of 1.62 by using both a cambered and an uncambered wing. The cambered wing was designed to produce efficient high lift by using attached supercritical crossflow and was originally tested as an isolated wing. The uncambered wing has the same planform and essentially the same thickness distribution as the cambered wing. The experiment determined the effects of a body and canards on both wings. The experimental data showed that both the...
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT MANEUVERS, BODY-WING CONFIGURATIONS, CAMBERED WINGS,...
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1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Carbon 14 terrestial ages were determined with low level minicomputers and accelerator mass spectrometry on 1 Yamato and 18 Allan Hills and nearby sited meteorites. Techniques for an accelerator mass spectrometer which make C(14) measurements on small samples were developed. Also Be(10) concentrations were measured in Byrd core and Allan Hills ice samples.
Topics: NASA Technical Reports Server (NTRS), ANTARCTIC REGIONS, BERYLLIUM 10, CARBON 14, METEORITES,...
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2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Oil was used to visualize inflight aerodynamic characteristics such as boundary layer transition, shock wave location, regions of separated flow, and surface flow direction. The technique, which is similar to wind tunnel oil-flow testing, involves an oil mixture to test aircraft before takeoff. After takeoff, the airplane climbs immediately to the test altitude and photographs are taken. The developmental experience is summarized, several examples of inflight oil-flow photographs are presented...
Topics: NASA Technical Reports Server (NTRS), F-111 AIRCRAFT, FLIGHT CHARACTERISTICS, FLOW DISTRIBUTION,...
1
1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Selected atmospheric conditions that were observed near Space Shuttle STS-41G launch time on October 5, 1984 at Kennedy Space Center in Florida are summarized. Values of ambient pressure, temperature, moisture, ground winds, visual obsrvations (cloud), and winds aloft are included. The sequence of prelaunch Jimsphere-measured vertical wind profiles is given. The final atmospheric tape consisting of wind and thermodynamic parameters versus altitude for STS-41G vehicle ascent was constructed. The...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC MOISTURE, ATMOSPHERIC PRESSURE, ATMOSPHERIC...
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2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Results of vertical and horizontal shock tests on type 200 VLR nitrogen tank are given.
Topics: NASA Technical Reports Server (NTRS), CRYOGENIC FLUID STORAGE, NITROGEN, SHOCK TESTS, STORAGE...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Selected atmospheric conditions observed near Space Shuttle STS-41D launch time on August 30, 1984, at Kennedy Space Center, Florida are summarized. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of prelaunch Jimsphere measured vertical wind profiles is given as well as wind and thermodynamic parameters representative of surface and aloft conditions in the SRB descent/impact ocean area. Final atmospheric...
Topics: NASA Technical Reports Server (NTRS), METEOROLOGICAL PARAMETERS, METEOROLOGY, SPACE SHUTTLE...
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2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Detailed descriptions of the data and format of the machine-readable astronomical catalog are given. The machine version is identical in data content to the published edition, but minor modifications in the data format were made in order to effect uniformity with machine versions of other astronomical catalogs. Stellar motions and positions at epoch and equinox 1950.0 are reported.
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, POSITION (LOCATION), STARS, STELLAR...
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0.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Trajectory and mission requirement data are presented for Earth-Mars opposition class and conjunction class round trip stopover mission opportunities available during the time period year 2000 to year 2045. The opposition class mission employs the gravitational field of Venus to accelerate the space vehicle on either the outbound or inbound leg. The gravitational field of Venus was used to reduce the propulsion requirement associated with the opposition class mission. Representative space...
Topics: NASA Technical Reports Server (NTRS), MARS (PLANET), MARS EXPLORATION, MISSION PLANNING, ROUND TRIP...
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2.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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Summary studies are presented for the entire cloud observation archieve from the NASA Global Atmospheric Sampling Program (GASP). Studies are also presented for GASP particle concentration data gathered concurrently with the cloud observations. Cloud encounters are shown on about 15 percent of the data samples overall, but the probability of cloud encounter is shown to vary significantly with altitude, latitude, and distance from the tropopause. Several meteorological circulation features are...
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT CONTROL, AIRCRAFT DESIGN, CLOUDS (METEOROLOGY),...
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1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The generated flow rates of gaseous hydrogen and gaseous oxygen from an electrical vehicle nickel-iron battery system were determined and used to evaluate the flame quenching capabilities of several candidate devices to prevent flame propagation within batteries having central watering/venting systems. The battery generated hydrogen and oxygen gases were measured for a complete charge and discharge cycle. The data correlates well with accepted theory during strong overcharge conditions...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC AUTOMOBILES, FLAMMABLE GASES, SAFETY, FLAMMABILITY,...
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1.0
Aug 23, 2016
08/16
Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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The test article, test approach, data analysis and results of a study undertaken to characterize performance of the augmentation section of the Rocket Research Company Augmented Catalytic Thruster as a gas resistojet using hydrogen, nitrogen and ammonia as propellants are described. This renewed interest in resistojets is a result of propulsion systems definition studies which indicate potential application to space station auxiliary propulsion.
Topics: NASA Technical Reports Server (NTRS), AUXILIARY PROPULSION, ELECTRIC PROPULSION, SPACE STATIONS,...
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Aug 23, 2016
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Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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the NASA Metrology Information Systems (NMIS) is being developed as a standardized tool in managing the NASA field Center's instrument calibration programs. This system, as defined by the NASA Metrology and Calibration Workshop, will function as a subsystem of the newly developed NASA Equipment Management System (NEMS). The Metrology Information System is designed to utilize and update applicable NEMS data fields for controlled property and to function as a stand alone system for noncontrolled...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, DATA MANAGEMENT, MANAGEMENT INFORMATION SYSTEMS,...
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Aug 23, 2016
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Aug 23, 2016
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NASA Technical Reports Server (NTRS)
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A large very precise near-field planar scanner was proposed for NASA Lewis Research Center. This scanner would permit near-field measurements over a horizontal scan plane measuring 18.3 m by 18.3 m. Large aperture antennas mounted with antenna boresight vertical could be tested up to 60 GHz. When such a large near field scanner is used for pattern testing, the antenna or antenna system under test does not have to be moved. Hence, such antennas and antenna systems can be positioned and supported...
Topics: NASA Technical Reports Server (NTRS), ANTENNA DESIGN, ANTENNA RADIATION PATTERNS, SPACECRAFT...
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Aug 23, 2016
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Aug 23, 2016
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The spectral coverage characteristics of the two thematic mapper instruments were determined by analyses of spectral measurements of the optics, filters, and detectors. The following results are presented: (1) band 2 and 3 flatness was slightly below specification, and band 7 flatness was below specification; (2) band 5 upper-band edge was higher than specifications; (3) band 2 band edges were shifted upward about 9 nm relative to nominal; and (4) band 4, 5, and 7 lower band edges were 16 to 18...
Topics: NASA Technical Reports Server (NTRS), CHANNELS (DATA TRANSMISSION), LANDSAT 4, MULTISPECTRAL BAND...
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Aug 23, 2016
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Aug 23, 2016
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The radiometric subsystem of NASA's LANDSAT-4 Thematic Mapper (TM) sensor is described. Special emphasis is placed on the internal calibrator (IC) pulse shapes and timing cycle. The procedures for the absolute radiometric calibration of the TM channels with a 122-centimeter integrating sphere and the transfer of radiometric calibration from the channels to the IC are reviewed. The use of the IC to calibrate TM data in the ground processing system consists of pulse integration, pulse averaging,...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, LANDSAT 4, RADIOMETRIC CORRECTION, REFLECTANCE,...