Frequency stability analysis of pulsar‐aided clocks

Autor:	Walid A. Majid, Po-Ting Chen, Jason L. Speyer
Rok vydání:	2019
Předmět:	Steady state Computer science Aerospace Engineering Spectral density Kalman filter 01 natural sciences Stability (probability) Signal Noise (electronics) Pulsar Hadamard transform 0103 physical sciences Electrical and Electronic Engineering 010303 astronomy & astrophysics 010301 acoustics Algorithm
Zdroj:	NAVIGATION. 66:621-632
ISSN:	2161-4296 0028-1522
DOI:	10.1002/navi.325
Popis:	This paper discusses the use of a pulsar signal in clock calibration. The analysis method is presented from the perspective of filtering theory, where Hadamard variance is used to analyze the frequency stability of both the stand-alone and the pulsar-aided clock systems. The aided clock is constructed using a steady state Kalman filter and accounts for the fractional power spectral density of the pulsar timing noise. The results of this simplified analysis indicate that the frequency stability of the aided clock has noticeable improvement at large averaging time due to the suppression of the random walk frequency noise in the stand-alone clock.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f4d897f7cf1314a48310caa1b09e251d https://doi.org/10.1002/navi.325 Zobrazit plný text záznamu Plný text