1–50 of 245 hits
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    Digial map database in support of avionic display systems

    Trenchard, M.E. / Lohrenz, M.C. / Rosche, H. et al. | Tema Archive | 1991
    of a global database of raster aeronautical chart data specifically designed for input to these systems. The Naval Oceanographic and ...

    Moderate-fast transient response of the Ge:Ga photoconductors

    Fujiwara, M. / Hiromoto, N. / Araki, K. | Tema Archive | 1995
    should be useful for the optimization of detector system performance to make clear the characteristics of the moderate-fast transient response ...

    Microsensors for tactical meteorology and oceanography

    Malafsky, G.P. | Tema Archive | 1996
    The increasing emphasis on military missions in littoral areas has created a need for better real-time meteorological and oceanographic ...

    Resolution verification targets for airborne and spaceborne imaging systems at the Stennis Space Center

    McKellip, R. / Ding Yuan / Graham, W. et al. | Tema Archive | 1997
    toward verification of these systems will become important for comparing the systems' operational performance. The Commercial Remote Sensing ...

    Pipe-lined algorithm and parallel architecture for real-time detection of sparse small objects in images

    Ito, M.R. / Duong, S. / McFee, J.E. et al. | Tema Archive | 1997
    A pipe-lined algorithm and parallel architecture is under development for real time detection of sparse small objects in images ...

    Final design, assembly, and testing of a space-based total integrated scatter instrument

    Hadaway, J. / Ahmad, A. / Bennett, J. | Tema Archive | 1997
    , part of the optical properties monitor (OPM) experiment developed for NASA by AZ Technology in Huntsville, was designed to fly for an extended ...

    Airborne aerothermal measurement of Cn2 in the tropopause

    Masson, B. / Rennich, B. | Tema Archive | 1997
    As a segment of a broader program to assess optical properties of the atmosphere in the vicinity of the tropopause, the refractive index ...

    A radiometric sensor performance model including atmospheric and infrared clutter effects

    Richter, R. / Davis, J.S. / Duggin, M.J. | Tema Archive | 1997
    The computer code SENSAT developed for radiometric investigations in remote sensing was extended to include two statistical clutter models ...

    Ground demonstration of an optical control system for a space-based sparse aperture telescope

    DeYoung, D. / Dillow, J. / Corcoran, S. et al. | Tema Archive | 1998
    project, a sparse aperture telescope design concept was developed. This design includes an optical control system capable of correcting the ...

    Optical stability testing of the fiber support technology (FiST) focal plane assembly of the SABER instrument

    Jensen, S.M. / Batty, J.C. / Esplin, R.W. et al. | Tema Archive | 1998
    a warm environment. The SABER team deemed it necessary to perform optical stability testing on this never-before-flown technology for ...

    Inchworm(R) motor developments for the Next Generation Space Telescope (NGST)

    Henderson, D. / Fasick, J.C. | Tema Archive | 1998
    temperature range and the loss of PZT motion is compensated for by adding extra PZT material or potentially by incorporating new cryogenic active ...

    Development and characterization of active pixel sensors for space applications

    Saint-Pe, O. / Davancens, R. / Tulet, M. et al. | Tema Archive | 1998
    level of performances that can be achieved. Nowadays, the first generation of commercial devices becomes available for consumer electronics, and ...

    Linear phase conjugation for atmospheric aberration compensation

    Grasso, R.J. / Stappaerts, E.A. | Tema Archive | 1998
    especially so for propagation over long distances. It is due primarily to fluctuations in the atmosphere over the propagation path, and from platform ...

    Passive IR polarization sensors: a new technology for mine detection

    Barbour, B.A. / Jones, M.W. / Barnes, H.B. et al. | Tema Archive | 1998
    suppress clutter, and the capability for zero Delta T imaging. Nichols Research Corporation (Nichols) is currently evaluating the effectiveness of ...

    Coil springs with constrained layer viscoelastic damping for passive isolation (of LIGO detectors)

    Ponslet, E.R. / Miller, W.O. | Tema Archive | 1998
    attenuation (-160 dB/decade above 15 Hz) of floor vibrations for ultra-sensitive (better than 10-18 m/ square root Hz noise floor between ...

    Recent advances on terrain database correlation testing

    Sakude, M.T. / Schiavone, G.A. / Morelos-Borja, H. et al. | Tema Archive | 1998
    Terrain database correlation is a major requirement for interoperability in distributed simulation. There are numerous situations in which ...

    Role of the atmosphere in target acquisition: models versus experiment

    Kopeika, N.S. / Melamed, R. / Yitzhaky, Y. | Tema Archive | 1998
    for ranges on the order of a kilometer or more, target acquisition is limited by atmospheric blur rather than by hardware. A significant ...

    Applications of uncooled microbolometer sensors

    Breen, T. / Butler, N. / Kohin, M. et al. | Tema Archive | 1998
    Lockheed Martin IR Imaging Systems is developing low cost, high performance, uncooled infrared imaging products for both military and ...

    Description and experimental results of a 58 lb portable LEO satellite tracker

    Tansey, R.J. / Campbell, B. / Koumvakalis, A. et al. | Tema Archive | 1998
    tracking software LEO pointing is demonstrated on f/10 eight' telescope to less than 8 mu rad for periods of 10 seconds, and 50 mu rad for entire ...

    Using 0.8 mu m DMILL technology to realize an encoder/decoder for optical transmission at 550 Mbps

    Claus, H. / Cabuy, F. / Roef, P. | Tema Archive | 1999
    data is digitized at the antennae. An optical harness distributes clocking data to the antennae to synchronize the digitizing of the data, and ...

    Modern data visualization for tactical intelligence

    Gustafson, G.C. | Tema Archive | 1999
    computer system and GIS can be used for this work. The current move of the U.S. Government away from legacy systems and towards COTS components ...

    Airborne laser radar: systems and methods for reconnaissance and terrain modeling

    Steinvall, O. / Soderman, U. / Ahlberg, S. et al. | Tema Archive | 1999
    A number of airborne nadir scanning laser radars have been developed for both military and civilian applications. These have range ...

    Instrumentation for obtaining best-image surface in remote-sensing optoelectronic systems

    Baklanov, A.I. / Zabiyakin, A.S. / Klushnikov, M.V. | Tema Archive | 1999
    Instrumentation for high-precision in-flight focusing of on-board optoelectronic equipment is described. The first part of the paper gives ...

    Overview of photonic materials and components for application in space environments

    Taylor, E.W. / Osinski, M. / Watson, M. et al. | Tema Archive | 1999
    . Optically based sensors, inertial guidance, tracking systems, communications, diagnostics, imaging and high speed optical processing are but a few ...

    Next-generation diode laser gas sensors for environmental and industrial monitoring

    May, R.D. | Tema Archive | 1999
    sensor design in the last several years. Miniaturization of the primary subsystems and development of robust data analysis software for space ...

    Single sensor processing and sensor fusion of GPR and EMI data for landmine detection

    Gao, P. / Tantum, S. / Collins, L. | Tema Archive | 1999
    performance gains over standard thresholding techniques. These performance gains hold for both time- and frequency-domain electromagnetic induction ...

    Thermal and mechanical performance of a carbon-carbon composite spacecraft radiator

    Kuhn, J.L. / Benner, S.M. / Butler, C.D. et al. | Tema Archive | 1999
    weight. However, the high cost and long lead-time for carbon-carbon manufacture have limited their widespread usage. Consequently, an informal ...

    Army Research Laboratory land mine and unexploded ordnance experiments and results

    Kappra, K.A. / Ressler, M.A. / Nguyen, L. et al. | Tema Archive | 1999
    radar for detection of buried mines and unexploded ordnance. As part of these programs, ARL has designed and built an instrumentation-grade ...

    Advanced algorithms and high performance testbed for large scale site characterization and subsurface target detection using airborne ground penetrating SAR

    Fijany, A. / Collier, J.B. / Citak, A. | Tema Archive | 1999
    Unexploded Ordnance (UXO) and in a broader sense the site characterization for identification of contaminated as well as clear areas. In preparation ...

    Effects of atmospheric turbulence and jitter on Fourier telescopy imaging systems

    Brinkley, T.J. / Sandler, D. | Tema Archive | 1999
    . We discuss the functions of the simulation code, and present sample results for image quality of the GEO object model. Simulations confirm ...

    Detection of object symmetry using bistatic and polarimetric GPR observations

    Stiles, J.M. / Parra-Bocaranda, P. / Apte, A. | Tema Archive | 1999
    It has been demonstrated that ground-penetrating radar (GPR) is an effective sensor for detecting the presence of subsurface objects ...

    Enhanced detection of land mines using broadband EMI data

    Gao, P. / Collins, L. / Moulton, J. et al. | Tema Archive | 1999
    detection algorithms based solely on metal content suffer from large false alarm rates. This false alarm problem can be mitigated for high-metal ...

    Modeling distributions of water and dielectric constants around land mines in homogeneous soils

    Hendrickx, J.M.H. / Das, B.S. / Borchers, B. | Tema Archive | 1999
    Many sensors for landmine detection are affected by soil water content, temperature, electrical conductivity and dielectric constant. The ...

    IR lasers in the object velocity remote sensing systems

    Kuzyakov, B.A. | Tema Archive | 1999
    effective laser parameters were defined for the smaller bodies velocity analysis. The laser is supplied with an automatic tuning optical system ...

    International Earth remote sensing: overview 1980-2010

    Glackin, D.L. | Tema Archive | 2000
    next decade. The scope of this paper is international. The work that forms the basis of this paper covers systems from Argentina to Ukraine ...

    HELINET: an integrated network of unmanned aerial vehicles for optical Earth surveillance

    Magli, E. / Olmo, G. / Moscheni, F. et al. | Tema Archive | 2000
    communications, as well as optical surveillance and traffic monitoring. Particularly for the surveillance application, an optical payload will be mounted ...

    Optical characterization of volume-scattering backgrounds

    Popescu, G. / Dogariu, A.C. | Tema Archive | 2000
    Scattering media act in many situations as backgrounds in target recognition and remote sensing and an accurate method for their ...

    Performance of a gated scannerless optical range imager against volume and bottom targets in a controlled underwater environment

    Rish, J.W. III / Lebien, S.M. / Nellums, R.O. et al. | Tema Archive | 2000
    An SRI breadboard designed specifically for use in the underwater environment was assembled, and a second series of underwater imaging ...

    Integrated high-power electro-optic lens/scanner for space-based platforms

    Gahagan, K.T. / Casson, J.L. / Gopalan, V. et al. | Tema Archive | 2000
    Dynamic scanning and focusing of a laser beam using a robust integrated solid state platform is desirable for many space-based applications ...

    Theoretical study of microwave radiometry for buried object detection

    Johnson, J.T. | Tema Archive | 2000
    An analytical study of environmental and clutter effects on microwave radiometers used for the detection of buried objects is presented. To ...

    Assessment of a passive microwave sensor for detecting landmines

    Calhoun, A.C. / Heberlein, D.C. / Rosen, E.M. et al. | Tema Archive | 2000
    Passive IR sensors have been demonstrated to be effective for detecting surface landmines. For shallow buried landmines, detection rates ...

    Acoustic and electromagnetic wave interaction: a technique for detection of buried objects

    Sarabandi, K. / Lawrence, D.E. | Tema Archive | 2000
    The idea of using acoustically induced Doppler spectra as a means for target detection and identification is introduced. To demonstrate ...

    Statistical signal processing for detection of buried landmines using quadrupole resonance

    Feng Liu / Tantum, S.L. / Collins, L.M. et al. | Tema Archive | 2000
    for TNT, and therefore the signal-to-noise ratio must be high for extracting the QR response. Further, the frequency at which the radiation ...

    Spectropolarimetric imaging using a field-portable imager

    Gupta, N. / Denes, L.J. / Gottlieb, M.S. et al. | Tema Archive | 2000
    spectral images were collected from 450 to 1000 nm at 10- or 20-nm intervals, at two or four polarization settings for each spectral interval. We ...

    Detection of landmines by amplified fluorescence quenching of polymer films: a man-portable chemical sniffer for detection of ultra-trace concentrations of explosives emanating from landmines

    la Grone, M.J. / Cumming, C.J. / Fisher, M.E. et al. | Tema Archive | 2000
    The explosive charge within a landmine is the source for a mixture of chemical vapors that form a distinctive chemical signature indicative ...

    Land mine detection measurements using acoustic-to-seismic coupling

    Ning Xiang / Sabatier, J.M. | Tema Archive | 2000
    were made using measured seismic/acoustic transfer function data. Recognizing the need for a non-contact sensor and the need to investigate the ...

    Subsurface discrimination using electromagnetic induction sensors

    Bell, T.H. / Barrow, B.J. / Miller, J.M. | Tema Archive | 2000
    magnetic polarizability for the different classes of objects do not overlap establishes an upper bound on discrimination. For various reasons, the ...

    Spectral polarization signatures of materials in the LWIR

    Fetrow, M.P. / Sposato, S.H. / Bishop, K.P. et al. | Tema Archive | 2000
    The emitted polarization signature of materials is of interest for use in discriminating targets from cluttered backgrounds. In addition ...

    Measurements and modeling of explosive vapor diffusion in snow

    Albert, M.R. / Cragin, J.H. / Leggett, D.C. | Tema Archive | 2000
    The detection of buried mines is important to both for humanitarian and military strategic de-mining both at home and abroad, and recent ...