Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446948
Andrew Jenkins, Sebastian Kuzminsky, Kevin K. Gifford, R. Pitts, Kelvin Nichols
The University of Colorado is working with NASA to extend Earth's internet into outer space and across the solar system. The new networking technology is called Disruption Tolerant Networking (DTN), and is being tested on the International Space Station. DTN will enable NASA and other space agencies around the world to better communicate with international fleets of spacecraft that will be used to explore the moon and Mars. This technology is evolving into an Interplanetary Internet. In this paper we describe the design and features of the DTN-on-ISS implementation as well as reporting initial results from the experimental deployment. 1,2
{"title":"Delay/Disruption-Tolerant Networking: Flight test results from the international space station","authors":"Andrew Jenkins, Sebastian Kuzminsky, Kevin K. Gifford, R. Pitts, Kelvin Nichols","doi":"10.1109/AERO.2010.5446948","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446948","url":null,"abstract":"The University of Colorado is working with NASA to extend Earth's internet into outer space and across the solar system. The new networking technology is called Disruption Tolerant Networking (DTN), and is being tested on the International Space Station. DTN will enable NASA and other space agencies around the world to better communicate with international fleets of spacecraft that will be used to explore the moon and Mars. This technology is evolving into an Interplanetary Internet. In this paper we describe the design and features of the DTN-on-ISS implementation as well as reporting initial results from the experimental deployment. 1,2","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126359624","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446998
S. Mukherjee, M. De Sanctis, T. Rossi, E. Cianca, M. Ruggieri, R. Prasad
In this paper an analysis on the use of Adaptive Coding and Modulation (ACM) techniques for EHF satellite communications is presented with reference to the DVB-S2 standard. The analysis is focused on W-band communication links and includes an optimization of DVB-S2 ACM thresholds of the received Signal to Noise Ratio (SNR) for Extremely High Frequency (EHF) links. The simulation model includes rain fading and amplifier nonlinearities which can not be neglected for the performance analysis and optimization of real systems in W-band. 1 2
{"title":"On the optimization of DVB-S2 links in EHF bands","authors":"S. Mukherjee, M. De Sanctis, T. Rossi, E. Cianca, M. Ruggieri, R. Prasad","doi":"10.1109/AERO.2010.5446998","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446998","url":null,"abstract":"In this paper an analysis on the use of Adaptive Coding and Modulation (ACM) techniques for EHF satellite communications is presented with reference to the DVB-S2 standard. The analysis is focused on W-band communication links and includes an optimization of DVB-S2 ACM thresholds of the received Signal to Noise Ratio (SNR) for Extremely High Frequency (EHF) links. The simulation model includes rain fading and amplifier nonlinearities which can not be neglected for the performance analysis and optimization of real systems in W-band. 1 2","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121539857","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446821
E. Sheybani, O. Mengshoel, S. Poll
Many diagnostic datasets suffer from the adverse effects of spikes that are embedded in data and noise. For example, this is true for electrical power system data where the switches, relays, and inverters are major contributors to these effects. Spikes are mostly harmful to the analysis of data in that they throw off real-time detection of abnormal conditions, and classification of faults. Since noise and spikes are mixed together and embedded within the data, removal of the unwanted signals from the data is not always easy and may result in losing the integrity of the information carried by the data. Additionally, in some applications noise and spikes need to be filtered independently. The proposed algorithm is a multi-resolution filtering approach based on Haar wavelets that is capable of removing spikes while incurring insignificant damage to other data. In particular, noise in the data, which is a useful indicator that a sensor is healthy and not stuck, can be preserved using our approach. Presented here is the theoretical background with some examples from a realistic testbed.1 2
{"title":"Removing spikes while preserving data and noise using wavelet filter banks","authors":"E. Sheybani, O. Mengshoel, S. Poll","doi":"10.1109/AERO.2010.5446821","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446821","url":null,"abstract":"Many diagnostic datasets suffer from the adverse effects of spikes that are embedded in data and noise. For example, this is true for electrical power system data where the switches, relays, and inverters are major contributors to these effects. Spikes are mostly harmful to the analysis of data in that they throw off real-time detection of abnormal conditions, and classification of faults. Since noise and spikes are mixed together and embedded within the data, removal of the unwanted signals from the data is not always easy and may result in losing the integrity of the information carried by the data. Additionally, in some applications noise and spikes need to be filtered independently. The proposed algorithm is a multi-resolution filtering approach based on Haar wavelets that is capable of removing spikes while incurring insignificant damage to other data. In particular, noise in the data, which is a useful indicator that a sensor is healthy and not stuck, can be preserved using our approach. Presented here is the theoretical background with some examples from a realistic testbed.1 2","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121618620","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446891
M. Hart, D. Bearden, J. Skratt
This paper summarizes the findings of several assessments of the technical, cost, and schedule feasibility of replacing the Ares I with a human-rated evolved expendable launch vehicle (EELV), and its first-order effects on the overall Constellation architecture. 12The paper examines if an EELV, specifically the Delta IV Heavy (Delta IV H), could serve the crew launch function, and if so, determine the impacts to the launch vehicle, production, and launch-base processing, and fabrication. Also included is an assessment of the effects on the Constellation architecture elements of replacing Ares I with a humanrated version of Delta IV H (HR Delta IV H), estimates of the associated cost and schedule (including impacts to Ares V cost and development time), and identification of impacts on national security space (NSS) if NASA utilizes an HR Delta IV H for low Earth orbit (LEO) human missions.
本文总结了用载人级演化一次性运载火箭(EELV)取代战神1号的技术、成本和进度可行性的几项评估结果，以及它对整个星座结构的一级影响。本文研究了EELV，特别是德尔塔IV重型(德尔塔IV H)，是否可以服务于机组发射功能，如果是这样，确定对运载火箭、生产、发射基地加工和制造的影响。还包括用载人版本的德尔塔IV H (HR德尔塔IV H)取代战神1号对星座结构要素的影响评估，相关成本和时间表的估计(包括对战神5号成本和开发时间的影响)，以及如果美国宇航局利用HR德尔塔IV H进行低地球轨道(LEO)载人任务对国家安全空间(NSS)的影响。
{"title":"Human rated Delta IV Heavy Constellation architecture impacts","authors":"M. Hart, D. Bearden, J. Skratt","doi":"10.1109/AERO.2010.5446891","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446891","url":null,"abstract":"This paper summarizes the findings of several assessments of the technical, cost, and schedule feasibility of replacing the Ares I with a human-rated evolved expendable launch vehicle (EELV), and its first-order effects on the overall Constellation architecture. 12The paper examines if an EELV, specifically the Delta IV Heavy (Delta IV H), could serve the crew launch function, and if so, determine the impacts to the launch vehicle, production, and launch-base processing, and fabrication. Also included is an assessment of the effects on the Constellation architecture elements of replacing Ares I with a humanrated version of Delta IV H (HR Delta IV H), estimates of the associated cost and schedule (including impacts to Ares V cost and development time), and identification of impacts on national security space (NSS) if NASA utilizes an HR Delta IV H for low Earth orbit (LEO) human missions.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122251101","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5447024
J. Keim, S. Mobasser, D. Kuang, Yang Cheng, Tonislav Ivanov, Andrew E. Johnson, H. Goldberg, G. Khanoyan, D. Natzic
From May 2 through May 7 of 2008, the Autonomous Landing and Hazard Avoidance Technology (ALHAT) Exploration Technology Development Program carried out a helicopter field test to assess the use of a flash LIDAR as a primary sensor during lunar landing. The field test data has been used to evaluate the performance of the LIDAR system and of algorithms for LIDAR Hazard Detection and Avoidance, Hazard Relative Navigation, and Passive Optical Terrain Relative Navigation. Reported here is a comprehensive description of the field test hardware, ground infrastructure and trajectory reconstruction methodologies1,2.
{"title":"Field test implementation to evaluate a flash LIDAR as a primary sensor for safe lunar landing","authors":"J. Keim, S. Mobasser, D. Kuang, Yang Cheng, Tonislav Ivanov, Andrew E. Johnson, H. Goldberg, G. Khanoyan, D. Natzic","doi":"10.1109/AERO.2010.5447024","DOIUrl":"https://doi.org/10.1109/AERO.2010.5447024","url":null,"abstract":"From May 2 through May 7 of 2008, the Autonomous Landing and Hazard Avoidance Technology (ALHAT) Exploration Technology Development Program carried out a helicopter field test to assess the use of a flash LIDAR as a primary sensor during lunar landing. The field test data has been used to evaluate the performance of the LIDAR system and of algorithms for LIDAR Hazard Detection and Avoidance, Hazard Relative Navigation, and Passive Optical Terrain Relative Navigation. Reported here is a comprehensive description of the field test hardware, ground infrastructure and trajectory reconstruction methodologies1,2.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122256084","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446764
H. Pourfarzaneh, A. Hajilouy-Benisi, M. Farshchi
In the conceptual design phase of a turbocharger, where emphasis is mainly on parametric studies, before manufacturing and tests, a generalized and robust model that applies over a wide range properly, is unavoidable. 12The critical inputs such as turbine maps are not available during the conceptual design phase. Hence, generalized turbine models use alternate methods that work without any supplementary tests and can operate over wide ranges. One of the common and applicable modeling methods in design process is ‘Dimensionless Modeling’ using the constant coefficient scaling (CCS). This method can almost predict the turbine characteristics at the design point. However, at off-design conditions, the error goes up as mass flow and speed parameters increase. Therefore, the results are not reliable at these points. In this paper, a variable coefficient scaling (VCS) method is described. Then, a radial turbine is modeled using the VCS method. To evaluate the model and compare it with the experimental results, some supplementary experiments are performed. Experimental studies are carried out on the turbine of a S2B model of the Schwitzer turbocharger in the turbocharger Lab., at Sharif University of Technology. The comparison between the experimental results and those obtained by the VCS method indicates good agreement. It also suggests that the present model can be used as an effective design tool for all operating conditions.
{"title":"A new analytical model of a radial turbine and validation by experiments","authors":"H. Pourfarzaneh, A. Hajilouy-Benisi, M. Farshchi","doi":"10.1109/AERO.2010.5446764","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446764","url":null,"abstract":"In the conceptual design phase of a turbocharger, where emphasis is mainly on parametric studies, before manufacturing and tests, a generalized and robust model that applies over a wide range properly, is unavoidable. 12The critical inputs such as turbine maps are not available during the conceptual design phase. Hence, generalized turbine models use alternate methods that work without any supplementary tests and can operate over wide ranges. One of the common and applicable modeling methods in design process is ‘Dimensionless Modeling’ using the constant coefficient scaling (CCS). This method can almost predict the turbine characteristics at the design point. However, at off-design conditions, the error goes up as mass flow and speed parameters increase. Therefore, the results are not reliable at these points. In this paper, a variable coefficient scaling (VCS) method is described. Then, a radial turbine is modeled using the VCS method. To evaluate the model and compare it with the experimental results, some supplementary experiments are performed. Experimental studies are carried out on the turbine of a S2B model of the Schwitzer turbocharger in the turbocharger Lab., at Sharif University of Technology. The comparison between the experimental results and those obtained by the VCS method indicates good agreement. It also suggests that the present model can be used as an effective design tool for all operating conditions.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114138324","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446936
Joshua Train, B. Etefia, Harley Green
Satellite payloads and wireless cell/broadband towers are being designed and deployed to simultaneously provide backbone network connectivity for hundreds to thousands of end-user networks. Hence, large wireless “hub and spoke” networks are created. In order to allow user-networks to utilize their own IP address space, hub nodes must distribute user routes throughout the hub and spoke network utilizing a common network routing protocol such as Border Gateway Protocol (BGP). RFC 4271 compliant BGP, also known as BGPv4, is not optimized to take advantage of the multicast capabilities of a wireless channel. In this paper we show that given a wireless hub and spoke network running BGP with N spokes, system wide bandwidth savings from O(N2) to O(N) can be gained through multicasting the BGP routing messages. We will first present an analytical model with equations that explain our hypothesis, and then introduce a multicast version of BGP called Hub and Spoke BGP. We present a comparison study of large scale hub and spoke emulations utilizing both standard BGP and our multicast-capable version, validating the bandwidth savings.1 2
正在设计和部署卫星有效载荷和无线蜂窝/宽带塔，以同时为数百到数千个最终用户网络提供骨干网络连接。因此，大型无线“集线器和辐射式”网络应运而生。为了允许用户网络利用自己的IP地址空间，集线器节点必须使用通用的网络路由协议(如边界网关协议(BGP))在整个集线器和spoke网络中分发用户路由。RFC 4271兼容的BGP，也称为BGPv4，没有优化利用无线信道的多播功能。在本文中，我们证明了给定一个运行有N条辐条的BGP的无线集线器和辐条网络，通过组播BGP路由消息可以获得从O(N2)到O(N)的系统带宽节省。我们将首先提出一个解析模型，用方程来解释我们的假设，然后介绍一种称为Hub and Spoke BGP的多播版本。我们提出了一个大型集线器和辐条模拟的比较研究，利用标准BGP和我们的多播功能版本，验证带宽节省。1 2
{"title":"Hub and Spoke BGP: Leveraging multicast to improve wireless inter-domain routing","authors":"Joshua Train, B. Etefia, Harley Green","doi":"10.1109/AERO.2010.5446936","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446936","url":null,"abstract":"Satellite payloads and wireless cell/broadband towers are being designed and deployed to simultaneously provide backbone network connectivity for hundreds to thousands of end-user networks. Hence, large wireless “hub and spoke” networks are created. In order to allow user-networks to utilize their own IP address space, hub nodes must distribute user routes throughout the hub and spoke network utilizing a common network routing protocol such as Border Gateway Protocol (BGP). RFC 4271 compliant BGP, also known as BGPv4, is not optimized to take advantage of the multicast capabilities of a wireless channel. In this paper we show that given a wireless hub and spoke network running BGP with N spokes, system wide bandwidth savings from O(N2) to O(N) can be gained through multicasting the BGP routing messages. We will first present an analytical model with equations that explain our hypothesis, and then introduce a multicast version of BGP called Hub and Spoke BGP. We present a comparison study of large scale hub and spoke emulations utilizing both standard BGP and our multicast-capable version, validating the bandwidth savings.1 2","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"75 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114161101","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446860
S. Bortolami, K. Duda, N. Borer
Pilot interaction with complex vehicles involves information perception and understanding, as well as decision making to select and execute the desired action. These decisions and actions are often time-critical and require an accurate response. When designing a complex system, the analysis of human-in-the-loop system performance is important during early-stage system design to assess the impact of varying levels of automation, redundancy, and task allocation. We have integrated several human performance models with a model of a piloted vehicle to analyze human-in-the-loop performance using Draper Laboratory's Performance and Reliability Analysis via Dynamic Modeling (PARADyM) toolkit. This approach provides a framework for understanding the effects of a vehicle component failure or human error as it propagates through a complex system. Vehicle and human performance models, which include a model of the Space Shuttle Orbiter lateral flight dynamics, visual and vestibular perception, rule-based judgment and decision making, and pilot action, were implemented using MATLAB/Simulink?. Trajectory scenarios were simulated for analysis with and without instrumentation failures, and with and without human errors. The resulting pilot-vehicle performance during scenarios with a component failure was compared to a baseline (no failure) trajectory. Performance thresholds were specified to determine whether the resulting vehicle trajectory represented degraded performance that was within the specified bounds (operational) or outside the bounds (resulting in system loss). At the present stage, this analysis methodology is viable as an early-stage design tool. However, if associated with experimentally validated models for both the human performance and vehicle dynamics, this approach has the potential for a mission and configuration design analysis tool.
{"title":"Markov analysis of human-in-the-loop system performance","authors":"S. Bortolami, K. Duda, N. Borer","doi":"10.1109/AERO.2010.5446860","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446860","url":null,"abstract":"Pilot interaction with complex vehicles involves information perception and understanding, as well as decision making to select and execute the desired action. These decisions and actions are often time-critical and require an accurate response. When designing a complex system, the analysis of human-in-the-loop system performance is important during early-stage system design to assess the impact of varying levels of automation, redundancy, and task allocation. We have integrated several human performance models with a model of a piloted vehicle to analyze human-in-the-loop performance using Draper Laboratory's Performance and Reliability Analysis via Dynamic Modeling (PARADyM) toolkit. This approach provides a framework for understanding the effects of a vehicle component failure or human error as it propagates through a complex system. Vehicle and human performance models, which include a model of the Space Shuttle Orbiter lateral flight dynamics, visual and vestibular perception, rule-based judgment and decision making, and pilot action, were implemented using MATLAB/Simulink?. Trajectory scenarios were simulated for analysis with and without instrumentation failures, and with and without human errors. The resulting pilot-vehicle performance during scenarios with a component failure was compared to a baseline (no failure) trajectory. Performance thresholds were specified to determine whether the resulting vehicle trajectory represented degraded performance that was within the specified bounds (operational) or outside the bounds (resulting in system loss). At the present stage, this analysis methodology is viable as an early-stage design tool. However, if associated with experimentally validated models for both the human performance and vehicle dynamics, this approach has the potential for a mission and configuration design analysis tool.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116047249","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446664
P. Winterrowd, Chad Orbe, J. Venbrux, S. Whitaker, E. Cameron, R. Nelson, G. Maki, D. Fisher, P. Yeh
A 320 Mbps radiation-tolerant image data compression application specific integrated circuit (ASIC) chip set has been developed. 12The ASIC chip set implements the Consultative Committee for Space Data Systems (CCSDS) recommendation for Image Data Compression. It is applicable to both near-Earth push-broom3 sensors as well as frame sensors used in exploration and deep space applications. The compressor can process sensor data in both lossless and lossy compression modes.
{"title":"A 320 Mbps flexible image data compressor for space applications","authors":"P. Winterrowd, Chad Orbe, J. Venbrux, S. Whitaker, E. Cameron, R. Nelson, G. Maki, D. Fisher, P. Yeh","doi":"10.1109/AERO.2010.5446664","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446664","url":null,"abstract":"A 320 Mbps radiation-tolerant image data compression application specific integrated circuit (ASIC) chip set has been developed. 12The ASIC chip set implements the Consultative Committee for Space Data Systems (CCSDS) recommendation for Image Data Compression. It is applicable to both near-Earth push-broom3 sensors as well as frame sensors used in exploration and deep space applications. The compressor can process sensor data in both lossless and lossy compression modes.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115980592","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}
Pub Date : 2010-03-06DOI: 10.1109/AERO.2010.5446810
R. Ujiie, M. Katahira, Tsutomu Matsumoto, A. Katoh, Shogo Ujihara
The software independent verification and validation (IV&V) is essential, especially in the development of aerospace systems, to improve safety and reliability and to prevent system problems. 12 We have used a hierarchical accident method. This method investigates the latent problems in the development process of a system that have not been thoroughly recognized in past IV&V.
{"title":"Application of hierarchical accident model in independent verification and validation","authors":"R. Ujiie, M. Katahira, Tsutomu Matsumoto, A. Katoh, Shogo Ujihara","doi":"10.1109/AERO.2010.5446810","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446810","url":null,"abstract":"The software independent verification and validation (IV&V) is essential, especially in the development of aerospace systems, to improve safety and reliability and to prevent system problems. 12 We have used a hierarchical accident method. This method investigates the latent problems in the development process of a system that have not been thoroughly recognized in past IV&V.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121166927","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}
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