1996 IEEE Aerospace Applications Conference. Proceedings最新文献_第10页

A long-range synthetic vision system combining a pyrotechnic-pumped laser and range-gated camera 一种远程合成视觉系统，结合了烟火泵浦激光器和距离门控摄像机

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495918

P. Pencikowski, Phil Csik

{"title":"A long-range synthetic vision system combining a pyrotechnic-pumped laser and range-gated camera","authors":"P. Pencikowski, Phil Csik","doi":"10.1109/AERO.1996.495918","DOIUrl":"https://doi.org/10.1109/AERO.1996.495918","url":null,"abstract":"Natural phenomena, such as clouds and man-made obscuration such as smoke, compromise the ability of satellites and high-flying aircraft to provide high-resolution imagery, Operations conducted at night also tend to yield reduced-resolution of images. The Northrop Grumman Corporation has recently begun a major sensor-development program of a pyrotechnic-pumped laser (PPL) illuminator and a range-gated camera. The near-term goal is a system that would deliver a penetration of 30,000 feet of atmospheric/obscuration. The PPLs under test have single-pulse power values that are orders-of-magnitude more powerful than conventional laser-pumping methodologies. The cost of these PPL's places them in the category of single use/disposable. This concept can likely be put in use for long-range operations in the mid-term (perhaps the year 2005). The system could provide all-weather, day and night earth imaging at very high resolutions. Since this long-range system would be required to image through approximately 30,000 feet of obscurant to be effective, PPL power levels and camera sensitivity is being scaled accordingly. This paper explores the concept, reports on progress to date (PPL and camera), and illustrates the proposed high altitude application.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"157 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":"116027155","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: 3

Summary of science results from spaceborne imaging radar (SIR-C/X-SAR) 星载成像雷达(SIR-C/X-SAR)科学成果综述

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495911

J. Plaut

{"title":"Summary of science results from spaceborne imaging radar (SIR-C/X-SAR)","authors":"J. Plaut","doi":"10.1109/AERO.1996.495911","DOIUrl":"https://doi.org/10.1109/AERO.1996.495911","url":null,"abstract":"SIR-C/X-SAR (Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar) is the most advanced imaging radar system to fly in Earth orbit. Carried in the cargo bay of the Space Shuttle Endeavour in April and October, 1994, SIR-C/X-SAR simultaneously records SAR data at three wavelengths (L-, C-, and X-bands; 23.5, 5.8 and 3.1 cm, respectively). In addition, the full polarimetric scattering matrix may be obtained at L- and C-band. Scientific investigations are continuing using SIR-C/X-SAR data in topics in geology, hydrology, ecology, oceanography and radar remote sensing techniques. Vegetation classification, biomass measurement, forest-floor flood imaging, snow cover distribution and wetness, and soil moisture estimation are some of the quantitative measurements that can be conducted using SIR-C/X-SAR data. In addition, a number of longer-term processes bearing on global change are being studied, including conditions of alpine glaciers, forest ecosystem health, volcanic activity, and desert processes. The October flight included acquisition of experimental repeat-pass interferometry data that have been used to generate digital elevation models and for detection of surface motions in volcanic, tectonic and glacial terrains.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"70 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":"123551722","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

Hyperspectral imaging payload for the NASA small satellite technology initiative program NASA小卫星技术计划的高光谱成像有效载荷

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495966

C. T. Willoughby, J. Marmo, M. Folkman

引用次数: 10

Modal analysis of segmented, laminated, anisotropic, inhomogeneous beams 分段、层压、各向异性、非均匀梁的模态分析

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.499664

R. Shorthill, R. A. Decker, B. Rice

引用次数: 0

Susceptibility of controller computers to environmental disruptions and its effects on system stability 控制计算机对环境干扰的敏感性及其对系统稳定性的影响

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495892

Hagbae Kim, A.L. White, K. Shin

{"title":"Susceptibility of controller computers to environmental disruptions and its effects on system stability","authors":"Hagbae Kim, A.L. White, K. Shin","doi":"10.1109/AERO.1996.495892","DOIUrl":"https://doi.org/10.1109/AERO.1996.495892","url":null,"abstract":"Electromagnetic Interference (EMI) causes controller upsets manifested as control-law computation errors in digital computers or transmission disturbances between sensor and/or actuator lines. Though its effects are likely to be transient, frequent occurrences of these upsets may lead to the loss of system stability. In this paper, we compute the stationary probability of those upsets induced due to EMI by using parameters accounting for EMI behavior and the conditional probabilities of upsets in the presence of EMI. The latter represents susceptibility to EMI depending upon the electrical shielding properties of controllers against various intensities and frequencies of EMI. We use a Markov-chain model to describe burst upsets when EMI is present. We then modify a system dynamic equation by including the stochastic features (occurrences/magnitudes) of these upsets, and examine the condition of system stability for the mean behaviors of the modified equation. The derived information about the required level of the stationary probability of upsets is a key to the design and verification of the integrity of reliable controllers. We also present a simple experiment emulating EMI on data transmission to estimate the necessary parameters and a demonstration example about system stability.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"45 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":"125346124","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: 12

Satellite data system architectures: a comparison of architecture performance 卫星数据系统架构:架构性能的比较

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495895

T. Spinney, A. N. Sorensen

引用次数: 0

Application of cryogenic thermal switch technology to dual focal plane concept for Brilliant Eyes sensor payload 低温热开关技术在“亮眼”传感器载荷双焦平面概念中的应用

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495920

D. Glaister, D. Curran, V. Mahajan, M. Stoyanof

{"title":"Application of cryogenic thermal switch technology to dual focal plane concept for Brilliant Eyes sensor payload","authors":"D. Glaister, D. Curran, V. Mahajan, M. Stoyanof","doi":"10.1109/AERO.1996.495920","DOIUrl":"https://doi.org/10.1109/AERO.1996.495920","url":null,"abstract":"Through the use of cryogenic thermal switch technology, the Brilliant Eyes (BE) government baseline payload configuration for the Flight Demonstration System (FDS) has been enhanced to provide infrared sensing capability with and without a running cryogenic refrigerator. This paper presents a summary of the baseline cooling configurations, assesses the advantages and disadvantages of the candidate thermal switch designs, and describes the requirements and configuration for a validation demonstration utilizing a sorption bed gas source. The primary infrared focal plane array (IRFPA) is cooled by a pair of cryogenic refrigerators at 60 K and a co-located second infrared focal plane assembly operating at a higher temperature is passively cooled by a cryogenic radiator at 135 K. The configuration relies on a cryogenic switch to thermally isolate the two cooling systems. The cryogenic thermal switch also has application to the Objective Flight System to reduce heat load parasitics from a redundant refrigerator system. Several thermal switch designs (including a gas gap switch, with remote storage or sealed gas, and a diode heat pipe) were evaluated. A configuration and requirements were developed for a validation demonstration program utilizing a gas gap sorption switch. The requirements were also flowed into an existing cryogenic flexible diode heat pipe technology program.","PeriodicalId":262646,"journal":{"name":"1996 IEEE Aerospace Applications Conference. Proceedings","volume":"197 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":"114270044","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

How the Department of the Navy translates space support requirements into program plans 海军部如何将空间支持需求转化为项目计划

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496051

D. Denson

引用次数: 0

X-33-taking the first step x -33迈出了第一步

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.495883

W.A. Gaubatz

引用次数: 0

Systems architecting: an emergent discipline? 系统架构:一门新兴学科?

1996 IEEE Aerospace Applications Conference. Proceedings Pub Date : 1996-02-03 DOI: 10.1109/AERO.1996.496066

M. Maier

引用次数: 15