Defense + Security Symposium最新文献

Thermal stability of atomic layer deposition Al2O3 film on HgCdTe HgCdTe上原子层沉积Al2O3薄膜的热稳定性

Defense + Security Symposium Pub Date : 2015-06-22 DOI: 10.1117/12.2180414

P. Zhang, C. Sun, Y. Zhang, X. Chen, K. He, Y. Chen, Z. Ye

引用次数: 2

Reducing narcissus with a GRIN 用笑容减少水仙花

Defense + Security Symposium Pub Date : 2015-06-16 DOI: 10.1117/12.2183589

J. Vizgaitis, Arthur R. Hastings

引用次数: 0

Design and fabrication of multispectral optics using expanded glass map 利用扩展玻璃图设计和制造多光谱光学元件

Defense + Security Symposium Pub Date : 2015-06-16 DOI: 10.1117/12.2177289

S. Bayya, D. Gibson, V. Nguyen, J. Sanghera, M. Kotov, G. Drake, J. Deegan, G. Lindberg

引用次数: 14

GRIN optics for multispectral infrared imaging 用于多光谱红外成像的GRIN光学系统

Defense + Security Symposium Pub Date : 2015-06-15 DOI: 10.1117/12.2177136

D. Gibson, S. Bayya, V. Nguyen, J. Sanghera, M. Kotov, G. Drake

引用次数: 19

An all-fiber, modular, compact wind lidar for wind sensing and wake vortex applications 全光纤，模块化，紧凑型风激光雷达，用于风传感和尾流涡应用

Defense + Security Symposium Pub Date : 2015-06-15 DOI: 10.1117/12.2181170

N. Prasad, R. Sibell, S. Vetorino, R. Higgins, A. Tracy

{"title":"An all-fiber, modular, compact wind lidar for wind sensing and wake vortex applications","authors":"N. Prasad, R. Sibell, S. Vetorino, R. Higgins, A. Tracy","doi":"10.1117/12.2181170","DOIUrl":"https://doi.org/10.1117/12.2181170","url":null,"abstract":"This paper discusses an innovative, compact and eyesafe coherent lidar system developed for wind and wake vortex sensing applications. With an innovative all-fiber and modular transceiver architecture, the wind lidar system has reduced size, weight and power requirements, and provides enhanced performance along with operational elegance. This all-fiber architecture is developed around fiber seed laser coupled to uniquely configured fiber amplifier modules. The innovative features of this lidar system, besides its all fiber architecture, include pulsewidth agility and user programmable 3D hemispherical scanner unit. Operating at a wavelength of 1.5457 microns and with a PRF of up to 20 KHz, the lidar transmitter system is designed as a Class 1 system with dimensions of 30”(W) x 46”(L) x 60”(H). With an operational range exceeding 10 km, the wind lidar is configured to measure wind velocities of greater than 120 m/s with an accuracy of +/- 0.2 m/s and allow range resolution of less than 15 m. The dynamical configuration capability of transmitted pulsewidths from 50 ns to 400 ns allows high resolution wake vortex measurements. The scanner uses innovative liquid metal slip ring and is built using 3D printer technology with light weight nylon. As such, it provides continuous 360 degree azimuth and 180 degree elevation scan angles with an incremental motion of 0.001 degree. The lidar system is air cooled and requires 110 V for its operation. This compact and modular lidar system is anticipated to provide mobility, reliability, and ease of field deployment for wind and wake vortex measurements. Currently, this wind lidar is undergoing validation tests under various atmospheric conditions. Preliminary results of these field measurements of wind characteristics that were recently carried out in Colorado are discussed.","PeriodicalId":230211,"journal":{"name":"Defense + Security Symposium","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117073501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Addressing fundamental architectural challenges of an activity-based intelligence and advanced analytics (ABIAA) system 解决基于活动的智能和高级分析(ABIAA)系统的基本架构挑战

Defense + Security Symposium Pub Date : 2015-06-11 DOI: 10.1117/12.2177492

Kevin G. Yager, T. Albert, B. Brower, Matthew F. Pellechia

{"title":"Addressing fundamental architectural challenges of an activity-based intelligence and advanced analytics (ABIAA) system","authors":"Kevin G. Yager, T. Albert, B. Brower, Matthew F. Pellechia","doi":"10.1117/12.2177492","DOIUrl":"https://doi.org/10.1117/12.2177492","url":null,"abstract":"The domain of Geospatial Intelligence Analysis is rapidly shifting toward a new paradigm of Activity Based Intelligence (ABI) and information-based Tipping and Cueing. General requirements for an advanced ABIAA system present significant challenges in architectural design, computing resources, data volumes, workflow efficiency, data mining and analysis algorithms, and database structures. These sophisticated ABI software systems must include advanced algorithms that automatically flag activities of interest in less time and within larger data volumes than can be processed by human analysts. In doing this, they must also maintain the geospatial accuracy necessary for cross-correlation of multi-intelligence data sources. Historically, serial architectural workflows have been employed in ABIAA system design for tasking, collection, processing, exploitation, and dissemination. These simpler architectures may produce implementations that solve short term requirements; however, they have serious limitations that preclude them from being used effectively in an automated ABIAA system with multiple data sources. This paper discusses modern ABIAA architectural considerations providing an overview of an advanced ABIAA system and comparisons to legacy systems. It concludes with a recommended strategy and incremental approach to the research, development, and construction of a fully automated ABIAA system.","PeriodicalId":230211,"journal":{"name":"Defense + Security Symposium","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126785895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flight test results of ladar brownout look-through capability 雷达熄火穿透能力飞行试验结果

Defense + Security Symposium Pub Date : 2015-06-11 DOI: 10.1117/12.2180629

S. Stelmash, T. Münsterer, Patrick Kramper, C. Samuelis, Daniel Bühler, M. Wegner, S. Sheth

引用次数: 8

Combining IR imagery and 3D lidar based symbology for a helicopter DVE support system 结合红外图像和基于三维激光雷达符号的直升机DVE支持系统

Defense + Security Symposium Pub Date : 2015-06-11 DOI: 10.1117/12.2180639

T. Münsterer, M. Kress, Dennis Fadljevic, M. Lupton, Graham Passey, Tony Lamb

引用次数: 6

Infrared SWAP detectors: pushing the limits 红外SWAP探测器:突破极限

Defense + Security Symposium Pub Date : 2015-06-11 DOI: 10.1117/12.2179212

Y. Reibel, R. Taalat, A. Brunner, L. Rubaldo, T. Augey, A. Kerlain, N. Péré-Laperne, A. Manissadjian, O. Gravrand, P. Castelein, G. Destefanis

引用次数: 19

Low-dark current p-on-n MCT detector in long and very long-wavelength infrared 低暗电流p-on-n MCT探测器在长和超长波长红外

Defense + Security Symposium Pub Date : 2015-06-11 DOI: 10.1117/12.2179216

C. Cervera, N. Baier, O. Gravrand, L. Mollard, C. Lobre, G. Destefanis, J. Zanatta, O. Boulade, V. Moreau

{"title":"Low-dark current p-on-n MCT detector in long and very long-wavelength infrared","authors":"C. Cervera, N. Baier, O. Gravrand, L. Mollard, C. Lobre, G. Destefanis, J. Zanatta, O. Boulade, V. Moreau","doi":"10.1117/12.2179216","DOIUrl":"https://doi.org/10.1117/12.2179216","url":null,"abstract":"This paper presents recent developments done at CEA-LETI Infrared Laboratory on processing and characterization of p-on-n HgCdTe (MCT) planar infrared focal plane arrays (FPAs) in LWIR and VLWIR spectral bands. These FPAs have been grown using liquid phase epitaxy (LPE) on a lattice matched CdZnTe substrate. This technology presents lower dark current and lower serial resistance in comparison with n-on-p vacancy doped architecture and is well adapted for low flux detection or high operating temperature. This architecture has been evaluated for space applications in LWIR and VLWIR spectral bands with cutoff wavelengths from 10μμm up to 17μm at 78K. Innovations have been introduced to the technological process to form a heterojunction with a LPE growth technique. The aim was to lower dark current at low temperature, by decreasing currents from the depletion region. Electro-optical characterizations on p-on-n photodiodes have been performed on QVGA format FPAs with 30μm pixel pitches. Results show excellent operabilities in current and responsivity, with low dispersion and noise limited by current shot-noise. Studies performed on dark current show that dark current densities are consistent with the heuristic prediction law \"Rule07\" at 78K. Below this temperature, dark current varies as a pure diffusion current.","PeriodicalId":230211,"journal":{"name":"Defense + Security Symposium","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132009129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18