Resilient PNT Concept Frame

The concept of resilient positioning,navigation and timing (PNT) is described.The definition of resilient PNT is given from the point of view of sensors integration,functional model and stochastic model.The relationship between the integrated (or comprehensive) PNT and resilient PNT is analyzed. It is pointed out that the integrated PNT is the foundation of the resilient PNT.The resilient PNT should be divided into the resilient sensors integration,resilient functional model and resilient stochastic model.The strategy and the principle of resilient integration of sensors are discussed.The resilient integration of sensors should be designed following the optimal,available and compatible as well as interoperable principles.The concepts of resilient functional model and the possible modification strategies of the resilient functional model are also described.Several possible optimal routes for resilient stochastic model improvements are also set forth.It is also pointed out that the optimal improvements of stochastic models for multi PNT sources should follow the same variance scale.At last,the resilient PNT data fusion for state parameters are given based on the resilient functional and stochastic models. © 2018, Surveying and Mapping Press. All right reserved.