On-Orbit Pulse Phase Estimation Based on CE-Adam Algorithm

Pulse phase is the basic measurements of X-ray pulsar-based navigation, and thus how to estimate a pulse for an orbiting spacecraft important. The current methods on-orbit estimation could provide accurate performance enhancing with photon amount, but its central processing unit (CPU) time cost also increases sharply increase amount. In this paper, method based on cross-entropy adaptive moment (CE-Adam) algorithm proposed reduce CPU while retaining decent accuracy. This combines CE Adam algorithms, able obtain global optimum low cost. verified by simulation data real from Neutron Star Internal Composition Detector (NICER). results show that greatly cost, which about 1.5% algorithm, retain similar accuracy algorithm.