2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)最新文献_第2页

A statistics of rare events method for transportation systems 交通运输系统罕见事件的统计方法

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931422

A.L. White

引用次数: 1

Performance of dielectric resonator oscillator for spacecraft transponding modem 航天器应答调制解调器用介电谐振振荡器的性能

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931349

N. Mysoor, S. Kayalar, C. Andricos, G. Walsh

{"title":"Performance of dielectric resonator oscillator for spacecraft transponding modem","authors":"N. Mysoor, S. Kayalar, C. Andricos, G. Walsh","doi":"10.1109/AERO.2001.931349","DOIUrl":"https://doi.org/10.1109/AERO.2001.931349","url":null,"abstract":"A new Spacecraft Transponding Modem (STM) is being developed for deep space communication applications. The STM receives an X-band (7.17 GHz) uplink signal and generates an X-band (8.4 GHz) and a Ka-band (32.0 GHz) coherent or noncoherent downlink signals. The STM architecture incorporates three miniature dielectric-resonator-oscillators (DRO). These DROs are used in receiver and exciter frequency synthesis phase-locked loops (PLL) in the STM. The DROs are designed with custom developed monolithic microwave integrated circuit (MMIC) negative resistance oscillator chips. DROs are laid out on alumina substrates in RF cavity fixtures of 18 mm/spl times/18 mm/spl times/8 mm. The receiver and the exciter DRO designs meet the following requirements: frequency stability of /spl plusmn/2 ppm//spl deg/C, the free running single-sideband phase noise of -50 dBc at 1-kHz offset frequency, tuning linearity of /spl plusmn/10% over the /spl plusmn/1.75-MHz locking range, and output power of +10 dBm/spl plusmn/1 dB over a design temperature range of -55/spl deg/C to +85/spl deg/C. The phase-locked loop DRO frequency synthesizers are designed using sampling downconverter and phase detector MMIC chips. These PLL frequency synthesizers meet the following requirements: pull-in range of /spl plusmn/1.75 MHz, loop noise bandwidth of 100 kHz, and a single-sideband phase noise of -144 dBc at 1-kHz offset frequency.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"11 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":"125535638","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: 4

Evolutionary mechanisms for smart on-board adaptive sensing applied to the MECA electrometer 应用于MECA静电计的智能车载自适应传感进化机制

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931191

D. Keymeulen, A. Stoica, M. Buehler, R. Zebulum, V. Duong

引用次数: 1

Proactive rideshare opportunity brokering services (PROBS) for secondary payloads 主动拼车机会中介服务(PROBS)为次要有效载荷

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931711

B. Horais, R. Twiggs, C. Byvik

引用次数: 0

Technology development for the Space Interferometry Mission (SIM)-status and plans 空间干涉测量任务(SIM)技术发展现状与计划

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931541

R. Laskin

引用次数: 1

Converting from a lab experiment to a flight instrument 将实验室实验转化为飞行仪器

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931539

Brian Cox, Parviz Danesh, E. Konefat

引用次数: 0

Transport protocols and applications for Internet use in space 空间因特网使用的传输协议和应用

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931277

E. Criscuolo, K. Hogie, R. Parise

{"title":"Transport protocols and applications for Internet use in space","authors":"E. Criscuolo, K. Hogie, R. Parise","doi":"10.1109/AERO.2001.931277","DOIUrl":"https://doi.org/10.1109/AERO.2001.931277","url":null,"abstract":"An Internet datagram delivery service between space systems only provides end-to-end addressability. Building systems and performing actual spacecraft operations requires a variety of services operating over the Internet datagram delivery service. This paper discusses ways to use the capabilities of the upper layer Internet protocols to support the varied communication needs of satellites. It focuses on protocols in the transport layer (layer 4) and application layer (layer 7) which use the basic packet delivery capabilities of the Internet Protocol (IP) and the network layer (layer 3). The transport layer primarily adds data stream multiplexing and reliable data delivery options for use by applications. Data stream multiplexing is provided by the port mechanism in the User Datagram Protocol (UDP) and the Transport Control Protocol (TCP). UDP provides a basic packet delivery service similar to that used in today's spacecraft while TCP provides an automatic retransmission capability for reliable data stream delivery. Data streaming is also supported by the Real Time Protocol (RTP) which operates over UDP. Each of these protocols has benefits and limitations in various space communication environments with a range of link errors, propagation delays, and bit rates. Transport protocol selection and operational usage are discussed with respect to satellite communication requirements. Finally, actual spacecraft operations are performed by using applications running over transport protocols. The use of standard Internet applications such as NTP, FTP, SMTP, and telnet is discussed with respect to satellite operational requirements. The actual use and performance of many of these protocols by the Operating Missions as Nodes on the Internet (OMNI) project at NASA/GSFC on orbit with the UoSAT-12 spacecraft is also described.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"19 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":"128792543","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: 25

DS1 ion propulsion emissions characterization DS1离子推进排放特性

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931211

M. Henry, D. Brinza

引用次数: 1

Multicasting with advantaged resources 具有优势资源的组播

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931424

M.J. Zukoski, Robert C. Durst

引用次数: 0

Web-based flight test training & mishap investigation support 基于网络的飞行测试训练和事故调查支持

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931221

D. Carico, Chengjian He, P. Blemel

引用次数: 0