Pub Date : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218387
E. Koyuncu, E. Garcia, G. Inalhan
AUTOFLY-Aid Project aims to develop and demonstrate novel automation support algorithms and tools to the flight crew for flight critical collision avoidance using “dynamic 4D trajectory management”. The automation support system is envisioned to improve the primary shortcomings of TCAS, and to aid the pilot through add-on avionics/head-up displays and reality augmentation devices in dynamically evolving collision avoidance scenarios. The main theoretical innovative and novel concepts to be developed by AUTOFLY-Aid project are a) design and development of the mathematical models of the full composite airspace picture from the flight deck's perspective, as seen/measured/informed by the aircraft flying in SESAR 2020, b) design and development of a dynamic trajectory planning algorithm that can generate at real-time (on the order of seconds) flyable (i.e. dynamically and performance-wise feasible) alternative trajectories across the evolving stochastic composite airspace picture (which includes new conflicts, blunder risks, terrain and weather limitations) and c) development and testing of the Collision Avoidance Automation Support System on a Boeing 737 NG FNPT II Flight Simulator with synthetic vision and reality augmentation while providing the flight crew with quantified and visual understanding of collision risks in terms of time and directions and countermeasures.
AUTOFLY-Aid项目旨在开发和演示新的自动化支持算法和工具，为机组人员使用“动态4D轨迹管理”进行飞行关键碰撞避免。预计自动化支持系统将改善TCAS的主要缺点，并通过附加的航空电子设备/平视显示器和现实增强设备在动态发展的避碰场景中帮助飞行员。AUTOFLY-Aid项目将开发的主要理论创新和新颖概念是:a)从飞行甲板的角度设计和开发由SESAR 2020飞行的飞机看到/测量/获知的全复合空域图像的数学模型;B)设计和开发一种动态轨迹规划算法，该算法可以在不断发展的随机复合空域图(包括新的冲突、失误风险、c)在波音737 NG FNPT II飞行模拟器上开发和测试防撞自动化支持系统，该系统具有合成视觉和现实增强功能，同时为机组人员提供时间、方向和对策方面的碰撞风险量化和视觉理解。
{"title":"Flight deck automation support with dynamic 4D trajectory management for ACAS: AUTOFLY-Aid","authors":"E. Koyuncu, E. Garcia, G. Inalhan","doi":"10.1109/ICNSURV.2012.6218387","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218387","url":null,"abstract":"AUTOFLY-Aid Project aims to develop and demonstrate novel automation support algorithms and tools to the flight crew for flight critical collision avoidance using “dynamic 4D trajectory management”. The automation support system is envisioned to improve the primary shortcomings of TCAS, and to aid the pilot through add-on avionics/head-up displays and reality augmentation devices in dynamically evolving collision avoidance scenarios. The main theoretical innovative and novel concepts to be developed by AUTOFLY-Aid project are a) design and development of the mathematical models of the full composite airspace picture from the flight deck's perspective, as seen/measured/informed by the aircraft flying in SESAR 2020, b) design and development of a dynamic trajectory planning algorithm that can generate at real-time (on the order of seconds) flyable (i.e. dynamically and performance-wise feasible) alternative trajectories across the evolving stochastic composite airspace picture (which includes new conflicts, blunder risks, terrain and weather limitations) and c) development and testing of the Collision Avoidance Automation Support System on a Boeing 737 NG FNPT II Flight Simulator with synthetic vision and reality augmentation while providing the flight crew with quantified and visual understanding of collision risks in terms of time and directions and countermeasures.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116143263","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218459
E. Chang
Presents a collection of slides from the author's conference presentation. • Rates discounting construction provide the most accurate rate of risk of ground collision during normal operations • Second part of the study analyzed the likelihood of an airborne collision • Results delivered in November 2011 • Analysis represents an example of growing application of large scale data systems in providing quantitative support to the SRM process
{"title":"Development of safety metrics using ASDE-X surveillance data for evaluation of ground collision risk","authors":"E. Chang","doi":"10.1109/ICNSURV.2012.6218459","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218459","url":null,"abstract":"Presents a collection of slides from the author's conference presentation. • Rates discounting construction provide the most accurate rate of risk of ground collision during normal operations • Second part of the study analyzed the likelihood of an airborne collision • Results delivered in November 2011 • Analysis represents an example of growing application of large scale data systems in providing quantitative support to the SRM process","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"18 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116167267","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218395
W. Chung, D. Linse, O. Alaverdi, C. Ifarragurrie, D. Salvano, S. Seifert
This study investigates the effects of two technical enablers, Automatic Dependent Surveillance - Broadcast (ADS-B) and digital data link communication, of the Federal Aviation Administration's Next Generation Air Transportation System (NextGen) under two separation assurance (SA) system architectures, ground-based SA and airborne SA, on overall separation assurance performance. Data link performance such as successful reception probability in both surveillance and communication messages, and surveillance accuracy are examined in various operational conditions. Required SA performance is evaluated as a function of subsystem performance, using availability, continuity, and integrity metrics to establish overall required separation assurance performance, under normal and off-nominal conditions. A Monte Carlo simulation was developed with data link performance attributes, i.e., availability, continuity, and integrity to evaluate tradeoffs of the separation assurance performance.
{"title":"Surveillance and data link communication performance analysis for NextGen","authors":"W. Chung, D. Linse, O. Alaverdi, C. Ifarragurrie, D. Salvano, S. Seifert","doi":"10.1109/ICNSURV.2012.6218395","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218395","url":null,"abstract":"This study investigates the effects of two technical enablers, Automatic Dependent Surveillance - Broadcast (ADS-B) and digital data link communication, of the Federal Aviation Administration's Next Generation Air Transportation System (NextGen) under two separation assurance (SA) system architectures, ground-based SA and airborne SA, on overall separation assurance performance. Data link performance such as successful reception probability in both surveillance and communication messages, and surveillance accuracy are examined in various operational conditions. Required SA performance is evaluated as a function of subsystem performance, using availability, continuity, and integrity metrics to establish overall required separation assurance performance, under normal and off-nominal conditions. A Monte Carlo simulation was developed with data link performance attributes, i.e., availability, continuity, and integrity to evaluate tradeoffs of the separation assurance performance.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115804240","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218476
Trip Delays, L. Sherry, A. Samant
Presents a collection of slides from the author's conference presentation.
展示了作者会议演讲的幻灯片集合。
{"title":"Anatomy of airline passenger","authors":"Trip Delays, L. Sherry, A. Samant","doi":"10.1109/ICNSURV.2012.6218476","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218476","url":null,"abstract":"Presents a collection of slides from the author's conference presentation.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126430588","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218413
Zheng Tao, M. Simons
The Federal Aviation Administration (FAA) plans to modernize the National Airspace System (NAS) through the implementation of new capabilities in the form of procedures, avionics equipage, infrastructure improvements, and automation tools. Some of these capabilities are intended to address operational shortfalls associated with Air Traffic Control (ATC) operations in the Terminal Radar Approach Control (TRACON) domain. This paper describes the methodology applied to TRACON ATC operations for identifying and ranking their shortfalls as well as capabilities that could address those shortfalls. The content in this paper is based upon work that the MITRE Corporation's Center for Advanced Aviation System Development (CAASD) has conducted in collaboration with the FAA to develop and adopt a strategy for addressing, ranking, and planning the implementation of new capabilities for terminal operations [1]. The methodology described in this paper includes an analysis of current shortfalls in the TRACON domain along with examples of capabilities intended to address these shortfalls. It also includes examples of the evaluation and ranking of these capabilities based on three key factors: relative value or benefit to operations; the feasibility or schedule achievability of the capability; and the amount of prerequisites the capability needs (e.g. new systems or system change). The paper presents examples of shortfalls and capabilities associated with the TRACON domain that resulted from the application of this methodology.
{"title":"A methodology for addressing operational shortfalls associated with terminal operations","authors":"Zheng Tao, M. Simons","doi":"10.1109/ICNSURV.2012.6218413","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218413","url":null,"abstract":"The Federal Aviation Administration (FAA) plans to modernize the National Airspace System (NAS) through the implementation of new capabilities in the form of procedures, avionics equipage, infrastructure improvements, and automation tools. Some of these capabilities are intended to address operational shortfalls associated with Air Traffic Control (ATC) operations in the Terminal Radar Approach Control (TRACON) domain. This paper describes the methodology applied to TRACON ATC operations for identifying and ranking their shortfalls as well as capabilities that could address those shortfalls. The content in this paper is based upon work that the MITRE Corporation's Center for Advanced Aviation System Development (CAASD) has conducted in collaboration with the FAA to develop and adopt a strategy for addressing, ranking, and planning the implementation of new capabilities for terminal operations [1]. The methodology described in this paper includes an analysis of current shortfalls in the TRACON domain along with examples of capabilities intended to address these shortfalls. It also includes examples of the evaluation and ranking of these capabilities based on three key factors: relative value or benefit to operations; the feasibility or schedule achievability of the capability; and the amount of prerequisites the capability needs (e.g. new systems or system change). The paper presents examples of shortfalls and capabilities associated with the TRACON domain that resulted from the application of this methodology.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116036205","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218490
Nick Lento
{"title":"NextGen test beds (FTB and NIEC)","authors":"Nick Lento","doi":"10.1109/ICNSURV.2012.6218490","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218490","url":null,"abstract":"","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128491603","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218384
Han Zhou, Haoyu Xu, Jiangnan Bian
The traffic load of civil aviation, conjunction with the aircraft density, determines the number of frequency channels and ground radio sites in order to support various levels of future air-to-ground communications services. In the U.S. and Europe, the Very High Frequency (VHF) spectrum is highly congested due to the out of date Double Sideband Amplitude Modulation (DSB-AM) voice communication system. The U.S. and Europe have proceeded to update the DSB-AM voice communication system to confront with the increasing traffic load on the civil aviation system. Currently, DSB-AM voice communication system is still mainly used in Civil Aviation of China for air traffic services and it is still unknown that what the capability of this system is regarding the distribution feature of the traffic in China. Our main contribution of this paper is to establish a mathematical model which is able to allocate the spectrum according to the capability of DSB-AM voice communication system and analyze the spectrum congestion status in China. Based on this model, the spectrum allocation and the timeliness of the need for voice aviation communication system with respect to the impacts of the creation of voice communication can be inferred; the model provides a way to describe the ability of the communication infrastructure to meet the requirements of air traffic services. In this paper, the spectrum congestion status of aerodrome control service for voice communication around Yang Zi Jiang River is analyzed based on the geographic location of the airport sites as well as their traffic movements.
{"title":"Modeling for spectrum congestion analysis of air-to-ground voice communications in China","authors":"Han Zhou, Haoyu Xu, Jiangnan Bian","doi":"10.1109/ICNSURV.2012.6218384","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218384","url":null,"abstract":"The traffic load of civil aviation, conjunction with the aircraft density, determines the number of frequency channels and ground radio sites in order to support various levels of future air-to-ground communications services. In the U.S. and Europe, the Very High Frequency (VHF) spectrum is highly congested due to the out of date Double Sideband Amplitude Modulation (DSB-AM) voice communication system. The U.S. and Europe have proceeded to update the DSB-AM voice communication system to confront with the increasing traffic load on the civil aviation system. Currently, DSB-AM voice communication system is still mainly used in Civil Aviation of China for air traffic services and it is still unknown that what the capability of this system is regarding the distribution feature of the traffic in China. Our main contribution of this paper is to establish a mathematical model which is able to allocate the spectrum according to the capability of DSB-AM voice communication system and analyze the spectrum congestion status in China. Based on this model, the spectrum allocation and the timeliness of the need for voice aviation communication system with respect to the impacts of the creation of voice communication can be inferred; the model provides a way to describe the ability of the communication infrastructure to meet the requirements of air traffic services. In this paper, the spectrum congestion status of aerodrome control service for voice communication around Yang Zi Jiang River is analyzed based on the geographic location of the airport sites as well as their traffic movements.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133955710","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218446
S. Henriksen, Natalie Zelkin, Ward Hall, James Magner, B. Phillips, T. Mitchell, R. Apaza, J. Gana
Presents a collection of slides from the author's conference presentation.
展示了作者会议演讲的幻灯片集合。
{"title":"C-band airport surface communications system standards development - AeroMACS mobile application testing","authors":"S. Henriksen, Natalie Zelkin, Ward Hall, James Magner, B. Phillips, T. Mitchell, R. Apaza, J. Gana","doi":"10.1109/ICNSURV.2012.6218446","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218446","url":null,"abstract":"Presents a collection of slides from the author's conference presentation.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133207383","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218501
Doug Marek
Presents a collection of slides from the author's conference presentation.
展示了作者会议演讲的幻灯片集合。
{"title":"Innovating and implementing PBN: Greener skies project","authors":"Doug Marek","doi":"10.1109/ICNSURV.2012.6218501","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218501","url":null,"abstract":"Presents a collection of slides from the author's conference presentation.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"456 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124324589","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 : 2012-04-24DOI: 10.1109/ICNSURV.2012.6218406
P. Diffenderfer, D. Osburn
At airports where there is an air traffic control (ATC) dependency between arrival and departure operations, it is challenging for air traffic controllers to maximize airport throughput due to a lack of dynamic information exchange and coordination between arriving and departing flights. This challenge exists at airports that conduct arrival and departure operations to the same runway and airports with crossing or converging runway operations. At airports where such a dependency exists, approach control generally establishes a static arrival interval sufficient to allow aircraft departures in the gaps between successive arrivals. Quite often the interval is only adjusted by means of verbal coordination between controllers in the tower and the Terminal Radar Approach Control (TRACON). At these airports, arrival/departure throughput may be improved by providing dynamic arrival spacing guidance to approach controllers based on the type of aircraft in the departure queue. The MITRE Corporation's Center for Advanced Aviation System Development (CAASD) is exploring a concept, Arrival - Departure Runway Integration Schedule, which provides automated arrival spacing guidance to approach controllers based on the aircraft queued or taxing to a dependent runway. Identifying the precise type and order of aircraft in the departure queue and the time required for each to enter the runway and depart allows for arrival spacing guidance to be provided to the approach controller. The guidance conveys the appropriate arrival intervals to accommodate aircraft in the departure queue, or may indicate that no gap beyond minimum allowable spacing is needed in the case that no flights are ready to depart. Airport throughput, departure queue wait time, and the time arrival aircraft spend in terminal airspace all stand to benefit from this concept. This paper reviews current operations, details the proposed concept, discusses how it might be applied, identifies parameters of interest, and highlights when benefits are likely to be realized.
{"title":"Improving throughput at airports with a dependency between arrival and departure operations","authors":"P. Diffenderfer, D. Osburn","doi":"10.1109/ICNSURV.2012.6218406","DOIUrl":"https://doi.org/10.1109/ICNSURV.2012.6218406","url":null,"abstract":"At airports where there is an air traffic control (ATC) dependency between arrival and departure operations, it is challenging for air traffic controllers to maximize airport throughput due to a lack of dynamic information exchange and coordination between arriving and departing flights. This challenge exists at airports that conduct arrival and departure operations to the same runway and airports with crossing or converging runway operations. At airports where such a dependency exists, approach control generally establishes a static arrival interval sufficient to allow aircraft departures in the gaps between successive arrivals. Quite often the interval is only adjusted by means of verbal coordination between controllers in the tower and the Terminal Radar Approach Control (TRACON). At these airports, arrival/departure throughput may be improved by providing dynamic arrival spacing guidance to approach controllers based on the type of aircraft in the departure queue. The MITRE Corporation's Center for Advanced Aviation System Development (CAASD) is exploring a concept, Arrival - Departure Runway Integration Schedule, which provides automated arrival spacing guidance to approach controllers based on the aircraft queued or taxing to a dependent runway. Identifying the precise type and order of aircraft in the departure queue and the time required for each to enter the runway and depart allows for arrival spacing guidance to be provided to the approach controller. The guidance conveys the appropriate arrival intervals to accommodate aircraft in the departure queue, or may indicate that no gap beyond minimum allowable spacing is needed in the case that no flights are ready to depart. Airport throughput, departure queue wait time, and the time arrival aircraft spend in terminal airspace all stand to benefit from this concept. This paper reviews current operations, details the proposed concept, discusses how it might be applied, identifies parameters of interest, and highlights when benefits are likely to be realized.","PeriodicalId":126055,"journal":{"name":"2012 Integrated Communications, Navigation and Surveillance Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122514862","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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