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1996 IEEE Aerospace Applications Conference. Proceedings最新文献

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Flexible voice/data platforms for commercial aircrafts 用于商用飞机的灵活语音/数据平台
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496076
A. Chame
{"title":"Flexible voice/data platforms for commercial aircrafts","authors":"A. Chame","doi":"10.1109/AERO.1996.496076","DOIUrl":"https://doi.org/10.1109/AERO.1996.496076","url":null,"abstract":"The availability of new semiconductor technologies has resulted in numerous new services in commercial aircrafts that were unheard of as recent as five years ago. These services support the needs of providing airline with individual voice/data communications in addition to the standard services of entertainment. The ability for an airline passenger to establish air-to-ground voice communications, and/or to connect via a data port to the enterprise network or other on-ground network and exchange information at virtually all times has become a compelling need for many people. This paper describes the usage of advanced integrated communications controllers in applications that support or enhance the existing on-going efforts that provide each airline passenger with individual voice and data communication services to connect to any desired location, on a global basis.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127269692","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: 1
Micron accurate deployable antenna and sensor technology for new-millennium-era spacecraft 用于新千年时代航天器的微米精确可展开天线和传感器技术
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495878
L. Peterson, S. Bullock, J. Hinkle, M.R. Hachkowski, P. Warren, M. Lake
{"title":"Micron accurate deployable antenna and sensor technology for new-millennium-era spacecraft","authors":"L. Peterson, S. Bullock, J. Hinkle, M.R. Hachkowski, P. Warren, M. Lake","doi":"10.1109/AERO.1996.495878","DOIUrl":"https://doi.org/10.1109/AERO.1996.495878","url":null,"abstract":"This paper summarizes recent results in a cooperative research program between the University of Colorado and NASA Langley Research Center in the deployment of precise antennas and reflectors from compact spacecraft. Advances in concepts, joints, materials, ground-test methodology, and micro-structural mechanics are presented which demonstrate the potential for passively positioning deployed components to within a few microns of their desired configuration. This technology promises to advance the state-of-the-art in deployment technology by several orders of magnitude in the next five to ten years. This means it will be possible to deploy reflectors with passive diffraction limited performance up to long wave infrared frequencies with a mass of perhaps five kilograms per square meter. Results of a ground test validation program and a planned flight validation experiment are presented to illustrate the key technical results of this research.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124945537","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: 16
Airborne LWIR hyperspectral measurements of military vehicles 军用车辆机载LWIR高光谱测量
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496058
R.P. Bongiovi, J. Hackwell, T.L. Hayburst
{"title":"Airborne LWIR hyperspectral measurements of military vehicles","authors":"R.P. Bongiovi, J. Hackwell, T.L. Hayburst","doi":"10.1109/AERO.1996.496058","DOIUrl":"https://doi.org/10.1109/AERO.1996.496058","url":null,"abstract":"Analysis of LWIR (8-13 /spl mu/m) hyperspectral data of military vehicles collected by a non-imaging sensor shows the potential of using imaging hyperspectrographs to locate and identify military vehicles. Spectral indices for soil, limestone, and vehicles are derived from in-scene data. These indices are then applied to other data sets to locate vehicles in sand and vegetation. This method consistently locates the vehicles, day or night, regardless of thermal contrast with the surroundings. Although these indices are robust, the results show that the sensor's Signal-to-Noise Ratio (SNR) of more than 1000 is barely adequate. Higher SNR will be required to accurately locate military vehicles with a low number of false alarms. An imaging LWIR hyperspectrograph is under construction to further research this area.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125508053","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: 5
Cost modeling process maturity-COCOMO 2.0 成本建模过程成熟度- cocomo 2.0
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496074
B. Clark
{"title":"Cost modeling process maturity-COCOMO 2.0","authors":"B. Clark","doi":"10.1109/AERO.1996.496074","DOIUrl":"https://doi.org/10.1109/AERO.1996.496074","url":null,"abstract":"This paper discusses a research effort to determine the effect that Software Process Maturity has on software development effort. Case studies to date report a cumulative positive effect when increasing the Process Maturity on a project and across an Organization. A new software cost estimation model, COCOMO 2.0, is used to account of all of the factors that influence effort thus permitting the isolation of Process Maturity's effects. The results of this research will identify a short-term gain from investing in software process improvement.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131831024","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: 8
How old is the Universe? Measuring the expansion rate with the Hubble Space Telescope 宇宙的年龄有多大?用哈勃太空望远镜测量膨胀率
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495872
W. Freedman
{"title":"How old is the Universe? Measuring the expansion rate with the Hubble Space Telescope","authors":"W. Freedman","doi":"10.1109/AERO.1996.495872","DOIUrl":"https://doi.org/10.1109/AERO.1996.495872","url":null,"abstract":"One of the primary motivations for building the Hubble Space Telescope was to allow an accurate measurement of the age of the Universe. The author describes the Hubble Space Telescope and the Wide Field and Planetary Camera used for this effort. A brief historical summary is given. Early in this century, astronomer Edwin Hubble provided evidence that the Universe was expanding. However, an accurate value for this expansion rate has eluded astronomers for almost seven decades. Unfortunately, the measurement of the expansion rate has turned out to be much more difficult than anticipated by Hubble. The reasons for this difficulty, and the need for an increased resolution over what can be achieved using ground-based telescopes, are outlined. Finally, results from the Hubble Space Telescope are presented. The preliminary results from the Hubble Space Telescope yield an age for the Universe of 8 billion years. This age is younger than the ages measured for the oldest objects in the Galaxy. This paradox and the implications of these results are discussed.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130654297","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
Applications of neural networks for aerospace-related technologies 神经网络在航天相关技术中的应用
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495983
J. Zurada
{"title":"Applications of neural networks for aerospace-related technologies","authors":"J. Zurada","doi":"10.1109/AERO.1996.495983","DOIUrl":"https://doi.org/10.1109/AERO.1996.495983","url":null,"abstract":"Over the last decade neural networks have emerged as a versatile computing technology, offering efficient solutions in many engineering, industrial and business applications, including decision support systems and medicine. This paper addresses the basic concepts of neurocomputing and discusses applications relevant to the aerospace industry. The advantages and drawbacks of neurocomputing are discussed as compared to conventional approaches to engineering solutions. Also, current needs and potential developments in the field are reviewed.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134179429","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: 5
A contactless transfer device for power and data 一种用于电力和数据的非接触式传输装置
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495936
G. Roberts, A. Owens, P. M. Lane, M. Humphries, R. K. Child, F. Bauder, J. Izquierdo
{"title":"A contactless transfer device for power and data","authors":"G. Roberts, A. Owens, P. M. Lane, M. Humphries, R. K. Child, F. Bauder, J. Izquierdo","doi":"10.1109/AERO.1996.495936","DOIUrl":"https://doi.org/10.1109/AERO.1996.495936","url":null,"abstract":"This paper describes the initial development of a Contactless Transfer Device (CTD) for on-orbit applications. Target specifications called for the transfer of several hundred Watts of power, and several tens of digital data lines with a combined capacity of around 5 Mbps. The design accommodates a central axle or pole of up to 55 mm diameter, and may be used in an in-side-in or an in-side-out configuration. A matrix evaluation technique based upon paired comparison between grouped evaluation criteria is described, and is used to select the preferred technologies for contactless data and power transfer. A modulated sub-carrier capacitive technique is selected for data-transfer, and a rotating transformer for power-transfer. The electronic and mechanical aspects of the design and the build standard of the Breadboard Model are described.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133821467","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
Digital terrain elevation mapping system 数字地形高程制图系统
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.499405
H. Malliot
{"title":"Digital terrain elevation mapping system","authors":"H. Malliot","doi":"10.1109/AERO.1996.499405","DOIUrl":"https://doi.org/10.1109/AERO.1996.499405","url":null,"abstract":"The Lockheed Martin Digital Terrain Elevation Mapping System (DTEMS) will be a commercial system for collection processing and archive of sub-meter precision digital terrain matrix (DTM) and three-meter resolution ortho-rectified digital polarimetric synthetic aperture radar (SAR) imagery. DTEMS will also produce commercial cartographic, terrain display, and topographic engineering products. DTEMS will use a synthetic aperture radar (SAR) mounted in an ER-2 aircraft to obtain stereo polarimetric X-band SAR images. The SAR images will be processed to obtain estimates of the horizontal position and elevation at postings separated horizontally by three meters. These estimates will be used to form the DTM. In turn, the DTM will be used to geometrically correct and ortho-rectify the polarimetric SAR images. To minimize the operational costs, the system will collect data simultaneously on both sides of the aircraft. The effective area coverage rate will exceed 700 km/sup 2//minute. For terrain with slopes of 45 degree or less, DTEMS will deliver DTMs with average one /spl sigma/ elevation precision of 0.3 meter, average absolute one /spl sigma/ elevation precision less than 0.6 meter, and three meter post spacing (posting). DTEMS data will satisfy National Map Accuracy Standards (NMAS) contour intervals of two to three meters.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134402652","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: 11
Wide-Field Infrared Explorer spacecraft system design 宽视场红外探测器航天器系统设计
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495973
D. Everett, L. Sparr
{"title":"Wide-Field Infrared Explorer spacecraft system design","authors":"D. Everett, L. Sparr","doi":"10.1109/AERO.1996.495973","DOIUrl":"https://doi.org/10.1109/AERO.1996.495973","url":null,"abstract":"Following a formal and competitive process, the Wide-Field Infrared Explorer (WIRE) instrument was selected in 1994 to become a participant in NASA/Goddard Space Flight Center's Small Explorer Program (SMEX). The WIRE instrument will be used to conduct a deep infrared, extra galactic science survey 500 times more sensitive than the Infrared Astronomy Satellite (IRAS) Faint Source Catalog. The WIRE instrument includes a cryogenically cooled (<7.5 K), 128/spl times/128 pixel, long wave, infrared detector embedded within an optical assembly which is cooled by a two-stage, solid-hydrogen cryostat. The WIRE spacecraft is being configured to be placed into a 470/spl times/540 km sun-synchronous orbit using an Orbital Sciences Corporation Pegasus XL launch vehicle. Total spacecraft mass will be less than 275 kg. Orbit average power consumed will be less than 175 W. The WIRE instrument will be delivered to NASA/Goddard Space Flight Center in early 1998 to undergo integration and test with the WIRE spacecraft bus and subsequently will be launched in the fall of 1998. The SMEX program uses a strict design-to-cost approach to manage and to contain overall mission cost. This paper will present the major instrument, operational and cost requirements driving the spacecraft systems design for the mechanical, structural, thermal, attitude control, command and data handling, power and electrical systems. It will document major system trade studies results and the subsequent spacecraft design to meet mission requirements.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130044021","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: 10
Assessment of large aperture lightweight imaging concepts 评估大口径轻量化成像概念
1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496063
K. Bell, R. H. Boucher, R. Vacek, M. Hopkins
{"title":"Assessment of large aperture lightweight imaging concepts","authors":"K. Bell, R. H. Boucher, R. Vacek, M. Hopkins","doi":"10.1109/AERO.1996.496063","DOIUrl":"https://doi.org/10.1109/AERO.1996.496063","url":null,"abstract":"High resolution imaging from space for surveillance and astrometry is currently limited by launch vehicle constraints and system cost. Current launch vehicles limit the total mass and volume that can be placed in orbit. The fundamental limitation on telescope resolution is aperture diameter. This paper investigates several innovative concepts (SiC primary, inflatable primary, and sparse optical arrays) to produce lightweight, lower cost telescopes that overcome the launch vehicle constraint issues. A trade space for future mission applications in both low earth orbit (LEO) and geosynchronous orbit (GEO) is defined and used as a metric to compare the performance of each concept. A rough order of magnitude (ROM) spacecraft design has been prepared to determine feasibility and to provide a relative comparison between concepts. The merits and drawbacks of each concept are discussed. Furthermore, the planning for a future integrated ground demonstration experiment at Phillips Laboratory is described.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125991192","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: 13
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