Experiment and Validation System for X-ray Pulsar-Based Navigation
Due to the huge costs, space flight experiment cannot be realized in the preliminary step of X-ray pulsar based navigation (XPNAV) research. So, a kind of XPNAV experiment and validation system is designed in this paper. This system is composed of two par
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Experiment and Validation System for X-ray Pulsar-Based Navigation Zhe Su, Yansong Meng, Qibing Xu, Xiaoliang Wang and Xingang Feng
Abstract Due to the huge costs, space flight experiment cannot be realized in the preliminary step of X-ray pulsar based navigation (XPNAV) research. So, a kind of XPNAV experiment and validation system is designed in this paper. This system is composed of two parts: the simulation of the pulsar signals and the calculation of navigation parameters. In the first part, the time at which X-ray photon arrive the solar system barycentre is modelled by non-homogeneous Poisson process, then the output pulse of X-ray detector while the observation of pulsars can be simulated by time transformation. In the second part, navigation information included in the pulsar signals which are simulated in the first part can be reached using the Delta-Correction method. This system can simulate four pulsar signals and the process of XPNAV at photo level. This system has the advantage of low costs and high simulation accuracy, and provides a reference for the design of prototype for space flight experiments.
Keywords Pulsar navigation Experiment and validation system homogeneous poisson process Time transfer
Non-
46.1 Introduction X-ray pulsar-based navigation (XPNAV) is a kind of new spacecraft automatic navigation technology, which is suitable for near earth orbit, deep space and inter stars spacecraft [1]. Because of the absorbing of earth’s atmosphere, we hardly can observe X-ray pulsar signal on the ground. Thus, the flight experiment of XPNAV should be implemented on the satellite out of earth’s atmosphere [2]. But the flight Z. Su (&) Y. Meng Q. Xu X. Wang X. Feng Academy of Space Information System, Xian 710100, China e-mail: [email protected]
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 245, DOI: 10.1007/978-3-642-37407-4_46, Ó Springer-Verlag Berlin Heidelberg 2013
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experiment on the satellite costs hugely. Before the space experiment on the satellite, we firstly should develop the cheap and simple XPNAV experiment and validation system in the laboratory to evaluate the principle and precision of XPNAV [3, 4]. This paper designs an X-ray pulsar-based navigation experiment and validation system (XPNAV-EVS). This system is composed of pulsar signal simulator and navigation parameter calculator. In the pulsar signal simulator, the X-ray pulsar photon arrival satellite time is simulated through the follow steps: firstly, the photon arrival solar system barycenter (SSB) time is simulated by the nonhomogeneous poisson process model, and the arrival time is then transferred to the arrival satellite time. In navigation parameter calculator, the position of satellite is calculated by the simulated arrival time of photons through the process of time transfer, period folding of photons and time delay measurement. This XPNAVEVS can simulate the XPNAV algorithm on photons level, and is
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