297
297
May 28, 2011
05/11
by
Kiplinger, Alan L
texts
eye 297
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A primary focus has been to conduct studies of particular types of hard X-ray evolution in solar flares and their associations with high energy interplanetary protons observed near Earth. Previously, two large investigations were conducted that revealed strong associations between episodes of progressive spectral hardening seen in solar events and interplanetary proton events (Kiplinger, 1995). An algorithm was developed for predicting interplanetary protons that is more accurate than those...
Topics: FUNCTIONAL ANALYSIS, INTERPOLATION, FUNCTIONALS, RANGEFINDING, CONTINUUMS
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267
Jun 21, 2010
06/10
by
Babinsky, A. D.; Huebscher, R. G.; Kiraly, B. J.; Ogrady, T. P.; Powell, J. D
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eye 267
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Onboard aircrew oxygen generating system for tactical aircraft
Topics: RANGEFINDING, SPACECRAFT TRACKING, PSEUDORANDOM SEQUENCES, RANDOM SIGNALS
236
236
May 24, 2011
05/11
by
Walch, Stephen P
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eye 236
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The ring closure reaction of C4H3 with acetylene to give phenyl radical is one proposed mechanism for the formation of the first aromatic ring in hydrocarbon combustion. There are two low-lying isomers of C4H3; 1-dehydro-buta-l-ene-3-yne (n-C4H3) and 2-dehydro-buta-l-ene-3-yne (iso-C4H3). It has been proposed that only n-C4H3 reacts with acetylene to give phenyl radical, and since iso-C4H3 is more stable than n-C4H3, formation of phenyl radical by this mechanism is unlikely. We report...
Topics: RANGEFINDING, LASER RANGE FINDERS, CAMERAS, TELEROBOTICS, YAW, PIXELS, SERVOMECHANISMS, TARGETS
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166
May 29, 2011
05/11
by
Mandutianu, Sanda; Stoica, Adria
texts
eye 166
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A complex system of spacecraft and ground tracking stations, as well as a constellation of satellites or spacecraft, has to be able to reliably withstand sudden environment changes, resource fluctuations, dynamic resource configuration, limited communication bandwidth, etc., while maintaining the consistency of the system as a whole. It is not known in advance when a change in the environment might occur or when a particular exchange will happen. A higher degree of sophistication for the...
Topics: TOPOGRAPHY, PHOBOS, RANGEFINDING, DATA ACQUISITION, TARGETS, SPACING, LASERS, FOOTPRINTS,...
275
275
Jul 6, 2010
07/10
by
UVAROV, V. B
texts
eye 275
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THE PROBLEM IS DISCUSSED OF FINDING POLYNOMIALS P BAR SUB N (X) ORTHOGONAL WITH RESPECT TO THE DISTRIBUTION FUNCTION RHO BAR (X), SIMPLY EXPRESSED IN TERMS OF RHO(X), FROM POLYNOMIALS P SUB N (X) ORTHOGONAL WITH RESPECT TO THE DISTRIBUTION FUNCTION RHO(X). FIRST A GENERAL CHRISTOFFEL FORMULA IS DERIVED. THEN THE RELATION BETWEEN SYSTEMS OF POLYNOMIALS ORTHOGONAL WITH RESPECT TO DISTRIBUTION FUNCTIONS WHICH DIFFER BY A PIECEWISE CONSTANT FUNCTION ARE CONSIDERED.
Topics: CATHODE RAY TUBES, ELECTRIC DISCHARGES, STORMS (METEOROLOGY), ITALY, OPTICAL MEASUREMENT,...
This status-report of the Wettzell Laser Ranging System (WLRS) gives an overview of its set up and the developments necessary to make the system operational.
Topics: NASA Technical Reports Server (NTRS), LASER RANGE FINDERS, LUNAR RANGEFINDING, RANGEFINDING,...
333
333
Jul 11, 2010
07/10
by
Berko, F. W.; Cahill, L. J., Jr.; Fritz, T. A
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eye 333
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Following a large magnetic storm (17 June 1972), Explorer 45 measured the equatorial particle populations and magnetic field. Using data obtained during the symmetic recovery phase, it is shown that through a series of self-consistent calculations, the measured protons with energies from 1 to 872 keV, can account for the observed ring current magnetic effects within experimental uncertainities. This enables an upper limit to be set for the heavy ion contribution to the storm time ring current.
Topics: MILITARY OPERATIONS, POSITION (LOCATION), RANGEFINDING, ARMED FORCES (UNITED STATES), GROUND...
419
419
May 30, 2011
05/11
by
Dutta, Prabir K
texts
eye 419
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Microporous materials include a large group of solids of varying chemical composition as well as porosity. These materials are characterized by channels and cavities of molecular dimensions. The framework structure is made up of interconnecting T-O-T' bonds, where T and T' can be Si, Al, P, Ga, Fe, Co, Zn, B and a host of other elements. Materials with Si-O-Al bonding in the framework are called zeolites and are extensively used in many applications. Ion-exchange properties of these materials...
Topics: GLOBAL POSITIONING SYSTEM, ALGORITHMS, POSITIONING, RANGEFINDING, TRANSMITTER RECEIVERS,...
354
354
May 22, 2011
05/11
by
Brown, Robert B
texts
eye 354
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A software pilot model for Space Shuttle proximity operations is developed, utilizing fuzzy logic. The model is designed to emulate a human pilot during the terminal phase of a Space Shuttle approach to the Space Station. The model uses the same sensory information available to a human pilot and is based upon existing piloting rules and techniques determined from analysis of human pilot performance. Such a model is needed to generate numerous rendezvous simulations to various Space Station...
Topics: AMBIGUITY, DOPPLER RADAR, RADAR RANGE, RADAR TARGETS, RANGEFINDING, RESOLUTION, SIGNAL PROCESSING,...
Digital processing system phase locks on received ranging signal and creates clean replica of received ranging code. System is broadly applicable to variety of terrestrial ranging problems, including oceanic navigation.
Topics: NASA Technical Reports Server (NTRS), PHASE LOCKED SYSTEMS, RANGEFINDING, TRANSPONDERS, Hurd, W. J.
221
221
Jul 23, 2010
07/10
by
Cohen, Herbert A
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eye 221
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In this overview, on the possible uses of high power beams aboard the space station, the advantages of the space station as compared to previous space vehicles are considered along with the kind of intense beams that could be generated, the possible scientific uses of these beams and associated problems. This order was delibrately chosen to emphasize that the means, that is, the high power particle ejection devices, will lead towards the possible ends, scientific measurements in the Earth's...
Topics: AIR NAVIGATION, LORAN C, MICROCOMPUTERS, RECEIVERS, SOFTWARE ENGINEERING, ARRIVALS, ERRORS, GROUND...
One reason for investigating Lightning Detection And Ranging (LDAR) is to validate data from the Optical Transient Detector (OTD). A Time-Of-Arrival (TOA) procedure may be used with radio wave portions of lighting signatures. An antenna is in place at KSC.
Topics: NASA Technical Reports Server (NTRS), RADIO WAVES, LIGHTNING, DETECTION, SIGNATURES, RANGEFINDING,...
304
304
Jul 26, 2010
07/10
by
Lang, Kenneth R
texts
eye 304
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The radio emission from dMe flare stars is discussed using Very Large Array and Arecibo observations as examples. Active flare stars emit weak, unpolarized, quiescent radio radiation that may be always present. Although thermal bremsstrahlung and/or thermal gyroresonance radiation account for the slowly-varying, quiescent radio radiation of solar active regions, these processes cannot account for the long-wavelength quiescent radiation observed from nearby dMe flare stars. It has been...
Topics: APERTURES, CONTINUOUS RADIATION, DIELECTRICS, DISTANCE, RANGEFINDING, REFLECTANCE, DISTANCE...
This dissertation develops a new general method of solving Prony's problem. Two special cases of this new method have been developed previously. They are the Matrix Pencil and the Osculatory Interpolation. The dissertation shows that they are instances of a more general solution type which allows a wide ranging class of linear functional to be used in the solution of the problem. This class provides a continuum of functionals which provide new methods that can be used to solve Prony's problem.
Topics: NASA Technical Reports Server (NTRS), FUNCTIONAL ANALYSIS, INTERPOLATION, FUNCTIONALS,...
The filtering of data in a high noise, low signal strength environment is a situation encountered routinely in lunar laser ranging (LLR) and, to a lesser extent, in artificial satellite laser ranging (SLR). The use of Poisson statistics as one of the tools for filtering LLR data is described first in a historical context. The more recent application of this statistical technique to noisy SLR data is also described.
Topics: NASA Technical Reports Server (NTRS), ELECTRONIC FILTERS, LASER APPLICATIONS, LASER RANGE FINDERS,...
Satellite Laser Ranging (SLR) techniques are used to accurately measure the distance from ground stations to retroreflectors on satellites and the moon. SLR is one of the fundamental techniques that define the international Terrestrial Reference Frame (iTRF), which is the basis upon which we measure many aspects of global change over space, time, and evolving technology. It is one of the fundamental techniques that define at a level of precision of a few mm the origin and scale of the ITRF....
Topics: NASA Technical Reports Server (NTRS), LASER RANGING, LUNAR RANGEFINDING, ORBIT DETERMINATION,...
287
287
Sep 20, 2010
09/10
by
Mason, Paul A. C.; Mook, D. Josep
texts
eye 287
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A technique is developed which demonstrates how to interpret a large fully-populated filter gain matrix as a set of scalar gains. The inverse problem is also solved, namely, how to develop a large-order filter gain matrix from a specified set of scalar gains. Examples are given to illustrate the method.
Topics: EPHEMERIDES, GLOBAL POSITIONING SYSTEM, NAVIGATION SATELLITES, ORBIT CALCULATION, RANGEFINDING, TDR...
463
463
May 27, 2011
05/11
by
Abdalla, Kaleel L
texts
eye 463
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The performance characteristics of several flush and shielded auxiliary exits were investigated at Mach numbers of 1.5 to 2.0, and jet pressure ratios from jet off to 10. The results indicate that the shielded configurations produced better overall performance than the corresponding flush exits over the Mach-number and pressure-ratio ranges investigated. Furthermore, the full-length shielded exit was highest in performance of all the configurations. The flat-exit nozzle block provided...
Topics: ASPECT RATIO, EFFICIENCY, ROTORS, STATORS, EXPERIMENTATION, SUPERSONIC TURBINES, TRANSONIC FLOW,...
486
486
May 6, 2010
05/10
by
Korvin, W.; Steckel, J
texts
eye 486
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Vertical radio frequency test range for antenna radiation measurement
Topics: ANTENNAS, FREQUENCY RANGES, RADIATION MEASUREMENT, RADIO FREQUENCIES, RANGEFINDING, TEST RANGES,...
298
298
Jul 26, 2010
07/10
by
Liu, W. Timothy; Gautier, Catherine; Frouin, Robert; Tagett, Rebecc
texts
eye 298
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Monthly distributions of surface latent heat flux and solar irradiance in the tropical Pacific were computed from observations of the scanning multichannel microwave radiometer on Nimbus-7 and the visible infrared spin scan radiometer on GOES-W. They are the dominant variable components of the surface heat flux, the sum of which gives the approximate thermal forcing on the ocean. Monthly maps of this sum, from January 1980 to September 1983, and within 20 deg N and 20 deg S, 180 deg and 80 deg...
Topics: COMPUTER PROGRAMMING, COMPUTER SYSTEMS DESIGN, COMPUTER SYSTEMS PERFORMANCE, EXPERT SYSTEMS,...
287
287
Jun 19, 2010
06/10
by
Feger, T
texts
eye 287
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Transmission of characteristic data and range measurement in air traffic control
Topics: AIR TRAFFIC CONTROL, DATA TRANSMISSION, GROUND BASED CONTROL, RANGEFINDING, AIR TRAFFIC CONTROL,...
A loop transponder for regenerating the code of a mu type ranging system is disclosed. It includes a phase locked loop, a code generator, and a loop detector. The function of the phase locked loop is to provide phase lock between a received component wk of the range signal and a replica rafter wk of the received component, provided by the code generator. The code generator also provides a replica of the next component rafter w(w+1). The loop detector responds to wk rafler wk and rafter w(k+1)...
Topics: NASA Technical Reports Server (NTRS), RANGEFINDING, REGENERATORS, TRANSPONDERS, LOOPS, PHASE LOCKED...
The antenna pictured below is part of a NASA-developed system for pinpointing the location and altitude of lightning activity in the atmosphere. Developed by Kennedy Space Center, it is called the Lightning Detection and Ranging (LDAR) system. Its original purpose was to give space launch controllers additional information on which to base launch or no launch decisions. It may also have utility in civil aviation. Last summer, NASA and the Federal Aviation Administration jointly conducted at...
Topics: NASA Technical Reports Server (NTRS), LIGHTNING, DETECTION, RANGEFINDING, POSITION (LOCATION), AIR...
A document discusses a method by which GMSK (Gaussian minimum shift keying) modulation and a pseudonoise (PN) ranging signal may be combined. By isolating the in-phase and quadrature components after carrier lock, and extracting their low-pass and band-pass filtered components, there is enough information available to both demodulate data and track the PN signal. The proposed combined GMSK communications and PN ranging is one potential approach to address emerging requirements for simultaneous...
Topics: NASA Technical Reports Server (NTRS), PSEUDONOISE, RANGEFINDING, SPACECRAFT COMMUNICATION,...
A low-noise electrode suited for sensing electrocardiograms when chronically and subcutaneously implanted in a free-ranging subject. The electrode comprises a pocket-shaped electrically conductive member with a single entrance adapted to receive body fluids. The exterior of the member and the entrance region is coated with electrical insulation so that the only electrolyte/electrode interface is within the member remote from artifact-generating tissue. Cloth straps are bonded to the member to...
Topics: NASA Technical Reports Server (NTRS), DETECTION, ELECTROCARDIOGRAPHY, ELECTRODES, LOW NOISE,...
The Eighth International Workshop for Laser Ranging Instrumentation was held in Annapolis, Maryland in May 1992, and was sponsored by the NASA Goddard Space Flight Center in Greenbelt, Maryland. The workshop is held once every 2 to 3 years under differing institutional sponsorship and provides a forum for participants to exchange information on the latest developments in satellite and lunar laser ranging hardware, software, science applications, and data analysis techniques. The satellite laser...
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, LASER RANGE FINDERS, LUNAR RANGEFINDING,...
286
286
May 21, 2011
05/11
by
Hamer, Paul; Angold, Nige
texts
eye 286
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Ulysses is a joint ESA-NASA mission, the primary purpose of the mission is to make scientific measurements of the Sun outside the plane of the ecliptic. The delay in launching Ulysses, due to the Challenger disaster, meant that the hardware on which the Spacecraft Control and Monitoring System (SCMS) resides was becoming obsolete, and it was decided to convert SCMS to run on a DEC/VAX machine under VMS. The paper will cover the spacecraft, the conversion, the converted SCMS, problems found, and...
Topics: DETECTION, ESTIMATES, REAL TIME OPERATION, LIGHTNING, POSITION INDICATORS, PROTECTION,...
730
730
Jul 12, 2010
07/10
by
Hawkins, J. E
texts
eye 730
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A 0.15 scale model of a proposed conformal variable-ramp inlet for the Multirole Fighter was tested from Mach 0.8 to 2.2 at a wide range of angles of attack and sideslip. Inlet ramp angle was varied to optimize ramp angle as a function of engine airflow, Mach number, angle of attack, and angle of sideslip. Several inlet configuration options were investigated to study their effects on inlet operation and to establish the final flight configuration. These variations were cowl sidewall cutback,...
Topics: ANTENNA RADIATION PATTERNS, BORESIGHT ERROR, ERROR ANALYSIS, PARABOLIC ANTENNAS, ATTENUATORS,...
Johnson Space Center (JSC) is designing a small, remotely controlled vehicle that will carry two color and one black and white video cameras in space. The device will launch and retrieve from the Space Vehicle and be used for remote viewing. Off the shelf cellular technology is being used as the basis for communication system design. Existing plans include using multiple antennas to make simultaneous estimates of the azimuth of the MiniAERCam from several sites on the Space Station and use...
Topics: NASA Technical Reports Server (NTRS), REMOTELY PILOTED VEHICLES, SPACE STATIONS, SPACECRAFT...
The discovery of paraffin based fuels has lead to renewed interest in hybrid rocket research. Experiments have shown that they burn 3-5 times faster than conventional hybrid fuels. High thrust level that would have required a multi-port design in the past can now be achieved with a single-port motor. While tests performed in Stanford and NASA Ames have demonstrated the paraffin hybrids to be a promising technology, one of the major challenges has been the relatively low efficiency. The c*...
Topics: NASA Technical Reports Server (NTRS), HYBRID PROPELLANT ROCKET ENGINES, COMBUSTION CHAMBERS,...
Topics: NASA Technical Reports Server (NTRS), AUSTRALIA, LASER APPLICATIONS, LUNAR EXPLORATION,...
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310
Jun 21, 2010
06/10
by
NON
texts
eye 310
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Holographic study of xenon arc lamp heat loads for solar environmental simulations
Topics: DIGITAL SYSTEMS, PHASE LOCKED SYSTEMS, RANGEFINDING, SPACECRAFT COMMUNICATION, COMBINATORIAL...
As the development of the NAVSTAR Global Positioning System (GPS) continues, there will increasingly be the need for a software centered signal model. This model must accurately generate the observed pseudorange which would typically be encountered. The observed pseudorange varies from the true geometric (slant) range due to range measurement errors. Errors in range measurement stem from a variety of hardware and environment factors. These errors are classified as either deterministic or random...
Topics: NASA Technical Reports Server (NTRS), ERRORS, GLOBAL POSITIONING SYSTEM, NAVSTAR SATELLITES,...
487
487
Jun 21, 2010
06/10
by
Hodgson, J. N.; Macosko, R. P
texts
eye 487
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SNAP 8 35 kW nuclear electric space power system
Topics: APOLLO PROJECT, RADIO RECEIVERS, SPACECRAFT COMMUNICATION, SPACECRAFT TRACKING, SUPERHIGH...
884
884
Jul 11, 2010
07/10
by
NON
texts
eye 884
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No Abstract Available
Topics: LASER APPLICATIONS, LASER RANGE FINDERS, LUNAR OBSERVATORIES, RANGEFINDING, DATA ACQUISITION, DATA...
Spacecraft range measurements have provided the most accurate tests, to date, of some relativistic gravitational parameters, even though the measurements were made with ranging systems having error budgets of about 10 meters. Technology is now available to allow an improvement of two orders of magnitude in the accuracy of spacecraft ranging. The largest gains in accuracy result from the replacement of unstable analog components with high speed digital circuits having precisely known delays and...
Topics: NASA Technical Reports Server (NTRS), GRAVITATIONAL WAVES, RANGEFINDING, RELATIVITY, ERROR...
512
512
May 30, 2011
05/11
by
Lofftus, David; Lund, Thomas; Rote, Donal
texts
eye 512
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The High-Lift Flight Tunnel (HiLiFT) concept is a revolutionary approach to aerodynamic ground testing. This concept utilizes magnetic levitation and linear motors to propel an aerodynamic model through a tube containing a quiescent test medium. This medium (nitrogen) is cryogenic and pressurized to achieve full flight Reynolds numbers higher than any existing ground test facility world-wide for the range of 0.05 to 0.50 Mach. The results of the Phase II study provide excellent assurance that...
Topics: LASER RANGE FINDERS, EARTH TERMINALS, SYNCHRONISM, ECHOES, LASERS, TRANSPONDERS, RANGEFINDING,...
An algorithm computes the direction of arrival (both azimuth and elevation angles) of a lightning-induced electromagnetic signal from differences among the times of arrival of the signal at four antennas in a Y-shaped array on the ground. In the original intended application of the algorithm, the baselines of the array are about 90 m long and the array is part of a lightning-detection-and-ranging (LDAR) system. The algorithm and its underlying equations can also be used to compute directions of...
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, ANTENNA ARRAYS, RANGEFINDING, DIRECTION FINDING,...
An optical transfer function was computed for the retroreflector array carried by the NTS-1 satellite. Range corrections are presented for extrapolating laser range measurements to the center of mass of the satellite. The gain function of the array was computed for use in estimating laser-echo signal strengths.
Topics: NASA Technical Reports Server (NTRS), ANTENNA ARRAYS, RETROREFLECTION, TRANSFER FUNCTIONS,...
The criteria for selecting site locations and constructing observing pads and monuments for the Mobile VLB1 and the satellite laser ranging systems used in the NASA/GSFC Crustal Dynamics Project are discussed. Gross system characteristics (size, shape, weight, power requirement, foot prints, etc.) are given for the Moblas, MV-1 through 3, TLRS-1 through 4 and Series instruments.
Topics: NASA Technical Reports Server (NTRS), EARTH CRUST, GEODYNAMICS, VERY LONG BASE INTERFEROMETRY,...
This grant supported observations of thunderstorms at Kennedy Space Center during the summer of 1995. In particular, we obtained detailed observations of lightning-producing storms over KSC with the CP2 radar of the National Center for Atmospheric Research (NCAR), for the purpose of comparing these with observations from KSC's Lightning Detection and Ranging (LDAR) system. The NCAR radar was a special purpose dual-polarization system for studying the development of precipitation in storms and...
Topics: NASA Technical Reports Server (NTRS), LIGHTNING, RADAR TRACKING, THUNDERSTORMS, ELECTRIFICATION,...
Improved parameters are presented for predicting the tropospheric effect on electromagnetic range measurements from surface meteorological data. More geographic locations have been added to the earlier list. Parameters are given for computing the dry component of the zenith radio range effect from surface pressure alone with an rms error of 1 to 2 mm, or the total range effect from the dry and wet components of the surface refractivity and a two-part quartic profile model. The new parameters...
Topics: NASA Technical Reports Server (NTRS), ELECTROMAGNETIC RADIATION, METEOROLOGICAL PARAMETERS, SURFACE...
A summary of the activities of the McDonald lunar laser ranging station at Fort Davis for the FY 77-78 fiscal year is presented. The lunar laser experiment uses the observatory 2.7m reflecting telescope on a thrice-per-day, 21-day-per-lunation schedule. Data are recorded on magnetic tapes and sent to the University of Texas at Austin where the data is processed. After processing, the data is distributed to interested analysis centers and later to the National Space Science Data Center where it...
Topics: NASA Technical Reports Server (NTRS), LASER RANGE FINDERS, LUNAR RANGEFINDING, REPORTS, PROJECTS,...
The International Laser Ranging Service (ILRS) organizes and coordinates Satellite Laser Ranging (SLR) and Lunar Laser Ranging (LLR) to support programs in geodetic, geophysical, and lunar research activities and provides the International Earth Rotation and Reference Systems Service (IERS) with products important to the maintenance of an accurate International Terrestrial Reference Frame (ITRF). This reference frame provides the stability through which systematic measurements of the Earth can...
Topics: NASA Technical Reports Server (NTRS), GEODESY, LASER RANGING, LUNAR RANGEFINDING, GEOPHYSICS, TIME...
A conductance measurement circuit to measure conductance of a solution under test with an output voltage proportional to conductance over a 5-decade range, i.e., 0.01 uS to 1000 uS or from 0.1 uS to 10,000 uS. An increase in conductance indicates growth, or multiplication, of the bacteria in the test solution. Two circuits are used each for an alternate half-cycle time periods of an alternate squarewave in order to cause alternate and opposite currents to be applied to the test solution. The...
Topics: NASA Technical Reports Server (NTRS), CIRCUITS, DYNAMIC RANGE, ELECTRIC POTENTIAL, RANGEFINDING,...
Today, most cultural training is based on or built around "cultural engagements" or discrete interactions between the individual learner and one or more cultural "others". Often, success in the engagement is the end or the objective. In reality, these interactions usually involve secondary and tertiary effects with potentially wide ranging consequences. The concern is that learning culture within a strict engagement context might lead to "checklist" cultural...
Topics: NASA Technical Reports Server (NTRS), CULTURAL RESOURCES, CULTURE (SOCIAL SCIENCES), EDUCATION,...
A new technique of passive ranging which is based on utilizing the image-plane expansion experienced by every object as its distance from the sensor decreases is described. This technique belongs in the feature/object-based family. The motion and shape of a small window, assumed to be fully contained inside the boundaries of some object, is approximated by an affine transformation. The parameters of the transformation matrix are derived by initially comparing successive images, and...
Topics: NASA Technical Reports Server (NTRS), IMAGE PROCESSING, OPTICAL FLOW (IMAGE ANALYSIS),...
2,596
2.6K
Jul 26, 2010
07/10
by
NON
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Papers presented at the NASA Conference on Space Telerobotics are compiled. The theme of the conference was man-machine collaboration in space. The conference provided a forum for researchers and engineers to exchange ideas on the research and development required for the application of telerobotics technology to the space systems planned for the 1990's and beyond. Volume 5 contains papers related to the following subject areas: robot arm modeling and control, special topics in telerobotics,...
Topics: END EFFECTORS, TEST STANDS, VIDEO EQUIPMENT, PHOTOELECTRICITY, RANGEFINDING, ROBOT ARMS, ROBOTICS,...
1,255
1.3K
Jul 26, 2010
07/10
by
Surgenor, Douglas MACN
texts
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The possibility of conducting experiments with the formed elements of the blood under conditions of microgravity opens up important opportunities to improve the understanding of basic formed element physiology, as well as, contribution to improved preservation of the formed elements for use in transfusion. The physiological, biochemical, and physical changes of the membrane of the erythrocyte, platelet, and leukocyte was studied during storage under two specific conditions: standard blood bank...
Topics: FOCAL PLANE DEVICES, PHOTODIODES, TRENDS, INFRARED DETECTORS, INFRARED RADIATION, MERCURY CADMIUM...
The objectives of this program were to identify and quantify factors which affect the performance of the L-band tone-code-data ranging transponders. Specific objectives included the following: (1) assemble the L-band ranging transponder, previously deployed in Hawaii for the tracking of the ATS-5 satellite, at the GE Radio-Optical Observatory; (2) configure the observatory to conduct calibration exercises with the transponder; and (3) conduct sufficient calibration experiments to demonstrate...
Topics: NASA Technical Reports Server (NTRS), RANGEFINDING, SATELLITE TRACKING, TRANSPONDERS, ULTRAHIGH...
