Pub Date : 2005-12-19DOI: 10.1109/AERO.2005.1559413
E.E. Jones
Over the past several years, there has been a growing interest within the United States defense department for something called responsive space. This movement is a reaction to a number of factors, the two most significant are: increasingly capable and miniaturized technologies and warfighter's needs for new capabilities in a network centric, system-of-systems age. Through the last 50 years of the military development of space systems, a spiral of increasing redundancy, capability and mission duration coupled with growing costs and schedules has made space increasingly unresponsive. Responsive space hopes to break out of this paradigm with agile and more capable small spacecraft employment. By lowering the cost and correspondingly shortening the timeliness, new niches for space-based systems will open up. These capabilities could be the "pointy end of the spear" with force applications deployed globally through common aero vehicles (CAV) on ready low cost launchers. Or they could they could be used to support intelligence, like a responsively launched and operated hyper spectral imaginary (HSI) payload flying on a common bus that was pulled out of storage and plugged into a payload through common interfaces. These responsive systems do not seek to replace traditional DoD space missions, but merely to augment the national strength with a new subset of capabilities. This will provide the joint war fighters and the national decision makers with new tools. Not every mission will be responsive, such as GPS and missile warning, which are needed in their current static peacetime configuration, but if responsive space is successful in some of its niches, many other systems could benefit from a responsive component of their architecture to supply capability on demand. Within the myriad of responsive space efforts underway, one of the drivers that has often been overlooked is the importance of the commercial market. Specifically, how important it is for driving costs down to make responsive space capabilities affordable to use. Responsive space systems must be simple enough and architected such that they are cost competitive for the function they perform. The overall approach must be incremental, however the initial capabilities must provide something short term that will show obvious utility to get the transformation started. Economies of scale from these initial capabilities will lower costs and increase launch vehicle fleets and satellite launch rates such that we break out of the current paradigms. For this to be possible we must develop highly modular systems to maximize the spacecraft lot size. Large lots are most important at initial stages, when responsive space systems will be easiest to dismiss as too expensive. This is really only achievable by considering commercial needs for the system as well. Satellite buses and launch vehicles that are designed for military purposes need to be flexible enough that they can support commercial needs as well.
{"title":"Architecting industry for responsive space","authors":"E.E. Jones","doi":"10.1109/AERO.2005.1559413","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559413","url":null,"abstract":"Over the past several years, there has been a growing interest within the United States defense department for something called responsive space. This movement is a reaction to a number of factors, the two most significant are: increasingly capable and miniaturized technologies and warfighter's needs for new capabilities in a network centric, system-of-systems age. Through the last 50 years of the military development of space systems, a spiral of increasing redundancy, capability and mission duration coupled with growing costs and schedules has made space increasingly unresponsive. Responsive space hopes to break out of this paradigm with agile and more capable small spacecraft employment. By lowering the cost and correspondingly shortening the timeliness, new niches for space-based systems will open up. These capabilities could be the \"pointy end of the spear\" with force applications deployed globally through common aero vehicles (CAV) on ready low cost launchers. Or they could they could be used to support intelligence, like a responsively launched and operated hyper spectral imaginary (HSI) payload flying on a common bus that was pulled out of storage and plugged into a payload through common interfaces. These responsive systems do not seek to replace traditional DoD space missions, but merely to augment the national strength with a new subset of capabilities. This will provide the joint war fighters and the national decision makers with new tools. Not every mission will be responsive, such as GPS and missile warning, which are needed in their current static peacetime configuration, but if responsive space is successful in some of its niches, many other systems could benefit from a responsive component of their architecture to supply capability on demand. Within the myriad of responsive space efforts underway, one of the drivers that has often been overlooked is the importance of the commercial market. Specifically, how important it is for driving costs down to make responsive space capabilities affordable to use. Responsive space systems must be simple enough and architected such that they are cost competitive for the function they perform. The overall approach must be incremental, however the initial capabilities must provide something short term that will show obvious utility to get the transformation started. Economies of scale from these initial capabilities will lower costs and increase launch vehicle fleets and satellite launch rates such that we break out of the current paradigms. For this to be possible we must develop highly modular systems to maximize the spacecraft lot size. Large lots are most important at initial stages, when responsive space systems will be easiest to dismiss as too expensive. This is really only achievable by considering commercial needs for the system as well. Satellite buses and launch vehicles that are designed for military purposes need to be flexible enough that they can support commercial needs as well. ","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132562732","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 : 2005-12-19DOI: 10.1109/AERO.2005.1559662
L. Nasser, R. Tryon, A. Dey
Electronic systems, such as power supplies, are complex multilayered devices consisting of different materials with inherent variability. Thermal gradient cycling occurs during system operation which eventually results in thermo-mechanical fatigue induced failure. Such failures can result in immediate electronic system shutdown with no advanced fault or warning signals; thus preventing the use of conventional fault-to-failure detection approaches as a means of predicting maintenance need. This NAVAIR sponsored SBIR project uses state-of-the-art material modeling to predict degradation of circuit board elements as a means for "simulated fault detection." This effort has been focused on the specific aspect of solder fracture and fatigue since electronic industry statistics have attributed this failure issue as a driving factor in system reliability. This project demonstrates feasibility for using conventional, off-the-shelf sensing, to predict solder degradation due to thermal cycling as a means to prognosticate electronic device reliability
{"title":"Material simulation-based electronic device prognosis","authors":"L. Nasser, R. Tryon, A. Dey","doi":"10.1109/AERO.2005.1559662","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559662","url":null,"abstract":"Electronic systems, such as power supplies, are complex multilayered devices consisting of different materials with inherent variability. Thermal gradient cycling occurs during system operation which eventually results in thermo-mechanical fatigue induced failure. Such failures can result in immediate electronic system shutdown with no advanced fault or warning signals; thus preventing the use of conventional fault-to-failure detection approaches as a means of predicting maintenance need. This NAVAIR sponsored SBIR project uses state-of-the-art material modeling to predict degradation of circuit board elements as a means for \"simulated fault detection.\" This effort has been focused on the specific aspect of solder fracture and fatigue since electronic industry statistics have attributed this failure issue as a driving factor in system reliability. This project demonstrates feasibility for using conventional, off-the-shelf sensing, to predict solder degradation due to thermal cycling as a means to prognosticate electronic device reliability","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"22 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114034885","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 : 2005-12-19DOI: 10.1109/AERO.2005.1559458
Y. Krikorian, H.T. Tan, N. Feldman, M. Ardeshiri, J. Kreng, M. Hart
The Jupiter icy moons orbiter (JIMO) high capability instrument (HCI) concept study examined a hypothetical suite of remote-sensing instruments that could take advantage of the large amounts of power available from a space nuclear reactor, and provide orders of magnitude of improvement in resolution and data return. A team of engineers at The Aerospace Corporation carried out an analysis to provide telecommunication considerations for data return from this candidate instrument suite that may be applicable to JIMO or other high-power space missions. This paper provides the communication system options that were proposed by our team. These options were based on instrument data rates, visibility time of the satellites to Earth, the time lines of the missions, and the appropriate technology readiness level (TRL) of the systems proposed. Three viable options for JIMO data return are presented in this paper
{"title":"Telecommunication considerations for Jupiter icy moons orbiter (JIMO)","authors":"Y. Krikorian, H.T. Tan, N. Feldman, M. Ardeshiri, J. Kreng, M. Hart","doi":"10.1109/AERO.2005.1559458","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559458","url":null,"abstract":"The Jupiter icy moons orbiter (JIMO) high capability instrument (HCI) concept study examined a hypothetical suite of remote-sensing instruments that could take advantage of the large amounts of power available from a space nuclear reactor, and provide orders of magnitude of improvement in resolution and data return. A team of engineers at The Aerospace Corporation carried out an analysis to provide telecommunication considerations for data return from this candidate instrument suite that may be applicable to JIMO or other high-power space missions. This paper provides the communication system options that were proposed by our team. These options were based on instrument data rates, visibility time of the satellites to Earth, the time lines of the missions, and the appropriate technology readiness level (TRL) of the systems proposed. Three viable options for JIMO data return are presented in this paper","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126495493","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559746
M. J. Baxter
This paper presents a general methodology for integrating modeling and simulation analysis activities with the Department of Defense (DoD) space systems acquisition process. Integration is accomplished by linking the classes of systems engineering problems encountered in developing technical requirements and specifications with the use of modeling and simulation to address these problems. The paper is organized as follows. After a brief introduction, the DoD space acquisition process is reviewed. In addition, the acquisition problems to which MS&A is applied are developed and described. Next, the structure and use of these problems in the acquisition process and a corresponding MS&A methodology are presented. Finally, the document summarizes the past trends in applying modeling and simulation to support DoD acquisitions and contrasts it with the emerging trends in supporting future capability-based acquisitions. The paper is intended to provide both acquisition planners and supporting engineers a structured approach to implementing MS&A in DoD space acquisitions
{"title":"A methodology for modeling, simulation, and analysis support of DoD space acquisitions","authors":"M. J. Baxter","doi":"10.1109/AERO.2005.1559746","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559746","url":null,"abstract":"This paper presents a general methodology for integrating modeling and simulation analysis activities with the Department of Defense (DoD) space systems acquisition process. Integration is accomplished by linking the classes of systems engineering problems encountered in developing technical requirements and specifications with the use of modeling and simulation to address these problems. The paper is organized as follows. After a brief introduction, the DoD space acquisition process is reviewed. In addition, the acquisition problems to which MS&A is applied are developed and described. Next, the structure and use of these problems in the acquisition process and a corresponding MS&A methodology are presented. Finally, the document summarizes the past trends in applying modeling and simulation to support DoD acquisitions and contrasts it with the emerging trends in supporting future capability-based acquisitions. The paper is intended to provide both acquisition planners and supporting engineers a structured approach to implementing MS&A in DoD space acquisitions","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115412280","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559711
J. Jaap, S. Phillips
As humankind embarks on longer space missions farther from home, the requirements and environments for scheduling the activities performed on these missions are changing. As we begin to prepare for these missions it is appropriate to evaluate the merits and applicability of the different types of scheduling engines. Scheduling engines temporally arrange tasks onto a timeline so that all constraints and objectives are met and resources are not overbooked. Scheduling engines used to schedule space missions fall into three general categories: batch, mixed-initiative, and incremental. This paper presents an assessment of the engine types, a discussion of the impact of human exploration of the moon and Mars on planning and scheduling, and the applicability of the different types of scheduling engines. This paper pursues the hypothesis that incremental scheduling engines may have a place in the new environment; they have the potential to reduce cost, to improve the satisfaction of those who execute or benefit from a particular timeline (the customers), and to allow astronauts to plan their own tasks
{"title":"On using an incremental scheduler for human exploration task scheduling","authors":"J. Jaap, S. Phillips","doi":"10.1109/AERO.2005.1559711","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559711","url":null,"abstract":"As humankind embarks on longer space missions farther from home, the requirements and environments for scheduling the activities performed on these missions are changing. As we begin to prepare for these missions it is appropriate to evaluate the merits and applicability of the different types of scheduling engines. Scheduling engines temporally arrange tasks onto a timeline so that all constraints and objectives are met and resources are not overbooked. Scheduling engines used to schedule space missions fall into three general categories: batch, mixed-initiative, and incremental. This paper presents an assessment of the engine types, a discussion of the impact of human exploration of the moon and Mars on planning and scheduling, and the applicability of the different types of scheduling engines. This paper pursues the hypothesis that incremental scheduling engines may have a place in the new environment; they have the potential to reduce cost, to improve the satisfaction of those who execute or benefit from a particular timeline (the customers), and to allow astronauts to plan their own tasks","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115505478","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559386
R. Wallis, G. Weaver, M. Reinhart, Sheng Cheng
Current ultra-stable oscillator (USO) technology relies on highly precise quartz resonators that are selected based on the desired output frequency and stability. These constraints on the crystal specifications significantly increase the lead time and expense of each USO. Recent research and development efforts in USOs by The Johns Hopkins University Applied Physics Laboratory (JHU/APL) have focused on a frequency synthesized USO based on a standardized, fixed-frequency resonator. The result of these efforts is a synthesized USO that will provide a frequency reference for transponders and other on-board users on future space missions. The frequency reference is stable enough for radio-science and navigation applications (Allan deviation <1.5 /spl times/ 10/sup -13/ at /spl tau/ = 10 s), and is electronically adjustable to cover the entire deep-space communications band. This frequency agility allows in flight re-assignment of the transponder frequencies. The synthesized USO offers low mass and DC power consumption yet maintains world-class noise performance and frequency stability performance.
{"title":"An advanced synthesized ultra-stable oscillator for spacecraft applications","authors":"R. Wallis, G. Weaver, M. Reinhart, Sheng Cheng","doi":"10.1109/AERO.2005.1559386","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559386","url":null,"abstract":"Current ultra-stable oscillator (USO) technology relies on highly precise quartz resonators that are selected based on the desired output frequency and stability. These constraints on the crystal specifications significantly increase the lead time and expense of each USO. Recent research and development efforts in USOs by The Johns Hopkins University Applied Physics Laboratory (JHU/APL) have focused on a frequency synthesized USO based on a standardized, fixed-frequency resonator. The result of these efforts is a synthesized USO that will provide a frequency reference for transponders and other on-board users on future space missions. The frequency reference is stable enough for radio-science and navigation applications (Allan deviation <1.5 /spl times/ 10/sup -13/ at /spl tau/ = 10 s), and is electronically adjustable to cover the entire deep-space communications band. This frequency agility allows in flight re-assignment of the transponder frequencies. The synthesized USO offers low mass and DC power consumption yet maintains world-class noise performance and frequency stability performance.","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123093571","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559728
S. Merida, R. Saha
NASA has not undertaken development of a large human spaceflight system since the design of the Space Shuttle System. While recent events have refocused human space flight with the goal of sending humans to Mars, the effort to synthesize a new human space flight architecture has been ongoing for the past five years. With a beginning as NASA's "Space Transportation Architecture Study" (STAS), through the final Orbital Space Plane (OSP) Program, the goals of human space flight have been evolving
{"title":"An operations based systems engineering approach for large-scale systems","authors":"S. Merida, R. Saha","doi":"10.1109/AERO.2005.1559728","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559728","url":null,"abstract":"NASA has not undertaken development of a large human spaceflight system since the design of the Space Shuttle System. While recent events have refocused human space flight with the goal of sending humans to Mars, the effort to synthesize a new human space flight architecture has been ongoing for the past five years. With a beginning as NASA's \"Space Transportation Architecture Study\" (STAS), through the final Orbital Space Plane (OSP) Program, the goals of human space flight have been evolving","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116627167","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559442
Keunjoo Park, D. Mortari, M. Ruggieri
Flower constellation design scheme was applied to design new global navigation system constellations called GNFCs. To investigate the possibility of reduced number of satellites in a GNFC, both genetic algorithms and flower constellation schemes are applied to find optimality. The proposed optimal GNFCs are then compared with GalileoSat constellation. New approach shows the better navigation performance than that of GalileoSat constellation
{"title":"Comparisons between GalileoSat and Global Navigation Flower Constellations","authors":"Keunjoo Park, D. Mortari, M. Ruggieri","doi":"10.1109/AERO.2005.1559442","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559442","url":null,"abstract":"Flower constellation design scheme was applied to design new global navigation system constellations called GNFCs. To investigate the possibility of reduced number of satellites in a GNFC, both genetic algorithms and flower constellation schemes are applied to find optimality. The proposed optimal GNFCs are then compared with GalileoSat constellation. New approach shows the better navigation performance than that of GalileoSat constellation","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116924234","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559726
M. Yukish
This paper presents a number of new, open research topics in design methods emerging from our use of an internally developed method for supporting trade space exploration for complex systems, to include spacecraft. The research topics focus on how the trade space exploration process affects how models are assembled and exercised, how features in the trade space can be traced back to their source in the models, and on how the process of increasing refinement in modeling is itself a tropic of research
{"title":"Research topics in trade space exploration","authors":"M. Yukish","doi":"10.1109/AERO.2005.1559726","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559726","url":null,"abstract":"This paper presents a number of new, open research topics in design methods emerging from our use of an internally developed method for supporting trade space exploration for complex systems, to include spacecraft. The research topics focus on how the trade space exploration process affects how models are assembled and exercised, how features in the trade space can be traced back to their source in the models, and on how the process of increasing refinement in modeling is itself a tropic of research","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117139911","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 : 2005-03-05DOI: 10.1109/AERO.2005.1559513
M. Picciolo, G. N. Schoenig, K. Gerlach, L. Mili
Adaptive radar requires independent and identically distributed (i.i.d.) training data, or snapshots, in order to obtain fast SINR convergence performance in the presence of correlated interference such as jamming and/or clutter returns. Targets, clutter discretes, and impulsive jamming are examples of non i.i.d., real-world data components that corrupt interference training data. Such data are considered to be statistical outliers. Recent outlier detection work for space time adaptive processing (STAP) training data selection has involved use of the generalized inner product (GIP) test statistic. In this paper, we use a prewhitening method followed by a robust projection statistics (PS) algorithm for 2D outlier removal prior to each building block in a reiterative adaptive cascaded canceller. SINR performance is shown to be superior using 2D PS compared to 2D GIP to excise multiple outliers
{"title":"Robust cascaded canceller using projection statistics for adaptive radar","authors":"M. Picciolo, G. N. Schoenig, K. Gerlach, L. Mili","doi":"10.1109/AERO.2005.1559513","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559513","url":null,"abstract":"Adaptive radar requires independent and identically distributed (i.i.d.) training data, or snapshots, in order to obtain fast SINR convergence performance in the presence of correlated interference such as jamming and/or clutter returns. Targets, clutter discretes, and impulsive jamming are examples of non i.i.d., real-world data components that corrupt interference training data. Such data are considered to be statistical outliers. Recent outlier detection work for space time adaptive processing (STAP) training data selection has involved use of the generalized inner product (GIP) test statistic. In this paper, we use a prewhitening method followed by a robust projection statistics (PS) algorithm for 2D outlier removal prior to each building block in a reiterative adaptive cascaded canceller. SINR performance is shown to be superior using 2D PS compared to 2D GIP to excise multiple outliers","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127446608","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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