Abstract
Confined spaces such as polar regions,deep earth and deep ocean are crucial navigation scenarios where traditional navigation techniques have difficulty in obtaining external signals for positioning.The cosmic ray muons,which carry the spatial and energetic information,are easy to penetrate these confined spaces.Therefore,the unique muon characteristic provides a new per-spective to estimate detector position,which can be considered using in confined spaces navigation.In this paper,a well-developed theory of muon navigation is established by combining a muon pseudorange measurement method.Moreover,an Equivalent Velocity Calculation Model(EVCM)and a Muon Sequence Matching Technology(MSMT)are proposed.The first model corrects flight pseudorange error caused by the relativistic energy loss and the second technology compensates the random error in pseudorange measurement.Further,a series of simulations are performed to ana-lyze the muon events number which can be received by detector in different scenarios with the vari-ations of zenith angle,detector area,varied detector plates gap,and muon flight distance.Meanwhile,the simulation results demonstrate that the muon navigation update rate every 10 min-utes can reach 5.989 in confined spaces at 100 m,and further pseudorange error analysis indicates that the meter-level positioning accuracy can be acquired.Finally,we construct a muon coincidence measurement scheme and verify that the laws of the muon positioning system for high-energy muons are consistent with the simulation results.
基金项目
Young Scientists Fund,China(62103021)
NETL
NSTL
万方数据