PNT智能服务

PNT intelligent services

定位导航定时(PNT)发展的重要方向是智能PNT服务。智能PNT服务必须首先感知用户PNT服务需求,以及用户所处的相关环境,进而实现多源PNT信息智能集成、观测模型智能优化及多源PNT信息智能融合,最终实现PNT信息的智能推送。本文从PNT智能感知、智能模型、智能数据融合到智能服务各个环节论述“智能PNT”的关键技术,并分析其内涵;提出PNT信息智能集成的“可用性准则”,PNT观测函数模型智能优化的“可靠性准则”,PNT多源观测随机模型优化依据的“不确定性准则”,多源PNT信息融合的“精确性准则”,PNT服务的“高效性准则”及高动态用户的“连续性准则”。分析认为,综合PNT是弹性PNT的基础,弹性PNT是智能PNT的基础,智能PNT是PNT服务的重点发展方向。

The important research direction of positioning,navigation and timing(PNT)is PNT intelligent services or smart PNT services.The most significant function of the PNT intelligent services is to sense the environment and the user requirements,to realize the intelligent integration of PNT information,intelligent modification of observation model and the intelligent fusion of multi-PNT information,and then to deliver the PNT service accordingly.This paper describes and analyzes the key techniques of intelligent PNT in different aspects,including the intelligent sensing,intelligent model,intelligent data integration and intelligent service.Additionally,the criteria for the PNT intelligent services are proposed,that is,the“availability criterion”for the intelligent PNT information integration,the“reliability criterion”for the intelligent functional model optimization,the“uncertainty criterion”for the stochastic model intelligent modification,the“accuracy criterion”for the intelligent PNT data fusion,and the“efficiency criterion”for the smart PNT services,as well as the“continuity criterion”for high dynamic users.The study further indicates that the comprehensive(or integrated)PNT is the foundation of the resilient PNT,the resilient PNT is the foundation of the intelligent PNT,and the intelligent PNT is the key development direction of PNT services.