描述一个全球导航卫星系统可用性模型及其在发展要求使用

描述一个全球导航卫星系统可用性模型及其在发展要求使用(中文11000字,英文6200字)
本文讨论了全球导航卫星系统（GNSS）的空中交通业务模型（GATOM），并评估使用全球导航卫星系统可用性。许多模型估计的平均床位[1-5]。除了平均值，输出的GATOM还包括鲜为人知的研究全球导航卫星系统所需的时间和空间特征。这些特点，必须理解这些有意义的业务的可用性=要求可以被定义，全球导航卫星系统的开发扩增，可以使整个系统满足这些要求。
GATOM是一个全面的，马尔可夫过程模型，计算在一个由用户指定地点的所需服务统计的各种措施; 全球导航卫星系统的主要服务是目前模拟导航和接收机自主完整性监测（RAIM算法）的检测和隔离功能。
该模型的最新版本是简要描述的，在与之有关的第一类和非模型精度方法中，对有效性进行了分析介绍。该分析报告的全球定位系统（GPS）的24至32颗卫星星座，并与巴罗，高度计和地球静止卫星增强。

Description of a GNSS Availability Model and Its Use in Developing Requirements
This paper discusses the use of the Global Navigation Satellite System (GNSS) Air Traffic Operations Model (GATOM) to assess GNSS availability. Many models estimate average availability [1—5]. In addition to the average value, the GATOM output also includes the little-studied temporal and spatial characteristics of GNSS availability. These characteristics must be understood so that operationally meaningful availability requirements can be defined, and augmentations to GNSS developed to allow the overall system to meet these requirements.
GATOM is a comprehensive, Markov process model that calculates a variety of statistical measures of the required services at locations specified by the user; the primary GNSS services modeled at present are navigation and the receiver autonomous integrity monitoring (RAIM) detection and isolation functions.
The current version of the model is brief ly described, and then the results are presented of an analysis conducted with the model regarding availability during Category I and non precision approaches. The analysis addresses Global Positioning System (GPS) constellations of 24 to 32 satellites, and augmentation with baro-altimeter and geostationary satellites.