2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)最新文献_第4页

Experiments with a real-time multi-pipeline architecture for shared control 实验与实时多管道架构共享控制

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931412

Sam Siewert

引用次数: 2

Balloon precursor mission for Venus Surface Sample Return 金星表面样本返回的气球前驱任务

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931706

V. V. Kerzhanovich, J. L. Hall, A. Yavrouian

引用次数: 2

Imaging Geostationary Fourier Transform Spectrometer-revolutionary tool for tropospheric chemistry 成像地球静止傅立叶变换光谱仪-对流层化学的革命性工具

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931477

N. Pougatchev, W. Smith, F. Harrison, A. Larar, C. Rinsland, D. Jacob, I. Bey, B. Field, R. Yantosca, A. Huang, S. Nolf, S. Kireev

引用次数: 0

Advanced design concepts for a SeaWinds scatterometer follow-on mission 海风散射计后续任务的先进设计概念

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931501

M. Spencer, J. Huddleston, B. Stiles

{"title":"Advanced design concepts for a SeaWinds scatterometer follow-on mission","authors":"M. Spencer, J. Huddleston, B. Stiles","doi":"10.1109/AERO.2001.931501","DOIUrl":"https://doi.org/10.1109/AERO.2001.931501","url":null,"abstract":"The SeaWinds wind scatterometer was first launched in June of 1999, and has contributed significantly to the study of global climate phenomena and to the fidelity of operational weather forecasting. A second SeaWinds instrument is planned to be launched aboard the Japanese ADEOS-II platform in late 2001, and operate until mid-decade. To extend the important Ku-Band scatterometer data base to the end of the decade and beyond, a follow-on system to the SeaWinds series of scatterometers is being developed. The goals for this system are to continue the core Ku-Band backscatter measurement, to further improve spacecraft accommodation constraints so as to be easily operated on a variety of platforms, and-where possible under existing cost constraints-improve wind retrieval performance. It is shown that a system, which meets these objectives, can be achieved by the addition of polarimetric measurement capability to the existing SeaWinds approach. Polarimetric scatterometry is demonstrated to improve wind measurement performance without impacting instrument complexity or cost, and has the long term potential to further ease spacecraft accommodation requirements.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126575723","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: 2

Small payload orbit transfer (SPORT/sup TM/) system: lowering launch cost without increased risk 小载荷轨道转移(SPORT/sup TM/)系统:降低发射成本而不增加风险

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931217

P. Gloyer, D. Goldstein

{"title":"Small payload orbit transfer (SPORT/sup TM/) system: lowering launch cost without increased risk","authors":"P. Gloyer, D. Goldstein","doi":"10.1109/AERO.2001.931217","DOIUrl":"https://doi.org/10.1109/AERO.2001.931217","url":null,"abstract":"The past decade has seen efforts to lower costs by \"doing more with less\", instead of making innovative changes in the way missions are designed and implemented. Now, the industry is turning towards more intelligent approaches to mission design. AeroAstro has developed the Small Payload ORbit Transfer (SPORT/sup TM/) system to provide a flexible low-cost orbit transfer capability, enabling small payloads to use low-cost secondary launch opportunities and still reach their desired final orbits. This allows small payloads to effectively use a wider variety of launch opportunities, including numerous under-utilized geosynchronous transfer orbit (GTO) slots. Its use, in conjunction with growing opportunities for secondary launches, enables \"better, cheaper, faster\" missions through innovative mission design and lower cost access to space, not increased risk. SPORT uses a suite of innovative technologies that are packaged in a simple, reliable, modular system. SPORT achieves its orbit transfer capability through a combination of chemical propulsion and aerobraking technology. This paper discusses the SPORT design and its application to overall small satellite mission development.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133647055","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

Modeling a complex antenna on a handheld telephone close to human tissue 模拟靠近人体组织的手持电话上的复杂天线

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931258

Caputa, M. Stuchly

{"title":"Modeling a complex antenna on a handheld telephone close to human tissue","authors":"Caputa, M. Stuchly","doi":"10.1109/AERO.2001.931258","DOIUrl":"https://doi.org/10.1109/AERO.2001.931258","url":null,"abstract":"Design-development and performance evaluation of antennas on handheld telephones can be done experimentally or numerically. Numerical modeling approach or a combination of experiment and numerical modeling, offer many advantages compared with purely experimental approach, which has been often used till now. However, modeling poses many challenges and in order to be considered reliable has to be verified. In this work, modeling of an antenna consisting of two helices is verified by a comparison with measurements made in the laboratory of the handset manufacturer, and by use of two different computer codes. The numerical method used in this investigation is the finite difference time domain (FDTD). A comparison of the measured (in manufacturer's laboratory) electric and magnetic field in four planes at distances 1-4 cm from the antenna with the computed values shows agreement within 15% (which corresponds to the uncertainty in measurements). This agreement is for two operational positions of the antenna in free space. Performance of the handset antenna in the vicinity of the user's head is evaluated. Investigations include the input impedance, far-field radiation pattern and power deposited in the human tissue. The influences of the ear shape and various positions of the handset with respect to the user's head have been evaluated.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132096409","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

Automated planning for interferometer configuration and control 自动规划干涉仪配置和控制

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931242

G. Rabideau, L. Reder, Steve Ankuo Chien, A. Booth

引用次数: 0

Development of a smart wireless networkable sensor for aircraft engine health management 用于飞机发动机健康管理的智能无线联网传感器的研制

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931402

B. Nickerson, R. Lally

引用次数: 31

Use of DGPS corrections with low power GPS receivers in a post SA environment 在后SA环境中使用低功率GPS接收机进行DGPS校正

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931360

H. Gehue, Warren Hewerdine

{"title":"Use of DGPS corrections with low power GPS receivers in a post SA environment","authors":"H. Gehue, Warren Hewerdine","doi":"10.1109/AERO.2001.931360","DOIUrl":"https://doi.org/10.1109/AERO.2001.931360","url":null,"abstract":"With the removal of the dithering effects of Selective Availability (SA), use of Differential GPS (DGPS) corrections can now be applied for extended periods of time allowing enhanced performance for low power configurations of a Si RF based GPS receiver. The software selectable low power settings, implemented by Si RF, employ three states; track, navigate and trickle. During track and trickle states there is no UART communication making reception of DGPS correction unavailable. During the NAV state (when the navigation calculation is performed), corrections may be received. Previously, SA induced error shortened the viable extrapolation time to less than 30 seconds; else significant navigation error would build up between measurements. Additionally, the need to return to a full power state every 30 seconds significantly increased the overall average power dissipation over standard TricklePower/sup TM/ operation. Now that SA (the dominate error source of the DGPS correction) has been removed, the time limit that a DGPS correction can be applied has been extended from 30 seconds to several minutes without significant degradation in navigation performance. This opens up opportunity for low power GPS receiver operation to make use of the DGPS correction to improve navigation without severely impacting the average power requirements. Si RF's implementations of low power operation, leverages off its unique architecture that allows 100 ms signal reacquisition allowing a pseudorange measurement to as little 200 ms. The chipset is then shut down for 800 ms, significantly reducing the power consumption, while still maintaining 1 Hz navigation updates.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115779017","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

High operating temperature FPAs for lighter, lower power satellite surveillance in the infrared 高工作温度fpa用于较轻，低功率的红外卫星监视

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931169

F. Roush, A.H. Kalma, I. Kasai, G. Venzor, D. A. Estrada, J. E. Jensen, J. Robinson

引用次数: 2