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

Wang, Yusong; Wang, Yidi; Zheng, Wei

doi:10.3390/aerospace8040095

Cited by 10 publications

(3 citation statements)

References 30 publications

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“…The relation between the pulsar vector observation system and the spacecraft can be measured by the spacecraft's onboard inertial sensors. The position of terminal B can be estimated by an X-ray pulsar-based navigation (XPNAV) system [29,30]. Assuming the proximal end (terminal A) is a satellite and the position of terminal A is known, then, the pointing vector of the XCOM link can be estimated with the obtained information.…”

Section: Basic Conceptsmentioning

confidence: 99%

A Pulsar Vector Observation-Based Link Acquisition Method for X-Ray Communications

Song,

Lu,

Wang

2023

International Journal of Aerospace Engineering

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X-ray communication (XCOM) is an emerging laser communication technique for deep space applications. Traditional link acquisition of laser communications depends significantly on Earth support and shows little autonomy. For XCOM, a pulsar vector observation-based link acquisition method is proposed, which utilizes noncooperative pulsars in deep space as beacons to acquire absolute attitude information and accomplish link acquisition. Firstly, a pulsar vector observation model was established based on the coordinate definition of the X-ray detector and X-ray collimator model. Secondly, a modified “success-failure” pulsar vector search algorithm with two degrees of freedom was proposed to acquire the pulsar vector. With the pulsar vector and the relative attitude obtained from inertial sensors, the link acquisition pointing vector could be determined. Finally, the performance of the proposed method was evaluated using numerical experiments, and factors that influence the performance are discussed and analyzed.

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Section: Basic Conceptsmentioning

confidence: 99%

A Pulsar Vector Observation-Based Link Acquisition Method for X-Ray Communications

Song,

Lu,

Wang

2023

International Journal of Aerospace Engineering

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“…We investigated three Earth-orbit spacecraft with the orbital elements shown in Table 1 [24]. We take the PSR B1821-24 pulsar as the observed pulsar, for which the simulation parameters are listed in Table 2 [39]. The template profile of this pulsar is given in Figure 5.…”

Section: Simulationsmentioning

confidence: 99%

Stellar Angle-Aided Pulse Phase Estimation and Its Navigation Application

Wang

Zheng

et al. 2021

Aerospace

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X-ray pulsar-based navigation (XNAV) is a promising autonomous navigation method, and the pulse phase is the basic measurement of XNAV. However, the current methods for estimating the pulse phase for orbiting spacecraft have a high computational cost. This paper proposes a stellar angle measurement-aided pulse phase estimation method for high Earth orbit (HEO) spacecraft, with the aim of reducing the computational cost of pulse phase estimation in XNAV. In this pulse phase estimation method, the effect caused by the orbital motion of the spacecraft is roughly removed by stellar angle measurement. Furthermore, a deeply integrated navigation method using the X-ray pulsar and the stellar angle is proposed. The performances of the stellar angle measurement-aided pulse phase estimation method and the integrated navigation method were verified by simulation. The simulation results show that the proposed pulse phase estimation method can handle the signals of millisecond pulsars and achieve pulse phase estimation with lower computational cost than the current methods. In addition, for HEO spacecraft, the position error of the proposed integrated navigation method is lower than that of the stellar angle navigation method.

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“…problem until the United States performed the XNAV onboard demonstration with the Neutron Star Interior Composition Explorer (NICER) on the International Space Station (ISS) in 2018 [6], [7]. China also verified the orbit determination performance of XNAV with the Crab pulsar data from Insight-Hard X-ray Modulation Telescope (Insight-HXMT) in 2019 [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Fast On-Orbit Pulse Phase Estimation of X-Ray Crab Pulsar for XNAV Flight Experiments

Wang

Zhang

et al. 2023

IEEE Trans. Aerosp. Electron. Syst.

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The recent flight experiments with Neutron Star Interior Composition Explorer (NICER) and Insight-Hard Xray Modulation Telescope (Insight-HXMT) have demonstrated the feasibility of X-ray pulsar-based navigation (XNAV) in the space. However, the current pulse phase estimation and navigation methods employed in the above flight experiments are computationally too expensive for handling the Crab pulsar data. To solve this problem, this paper proposes a fast algorithm of on-orbit estimating the pulse phase of Crab pulsar called Xray pulsar navigaTion usIng on-orbiT pulsAr timiNg (XTITAN). The pulse phase propagation model for Crab pulsar data from Insight-HXMT and NICER are derived. When an exposure on the Crab pulsar is divided into several sub-exposures, we derive an on-orbit timing method to estimate the hyperparameters of the pulse phase propagation model. Moreover, XTITAN is improved by iteratively estimating the pulse phase and the position and velocity of satellite. When applied to the Crab pulsar data from NICER, XTITAN is 58 times faster than the grid search method employed by NICER experiment. When applied to the Crab pulsar data from Insight-HXMT, XTITAN is 180 times faster than the Significance Enhancement of Pulse-profile with Orbitdynamics (SEPO) which was employed in the flight experiments with Insight-HXMT. Thus, XTITAN is computationally much efficient and has the potential to be employed for onboard computation.

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

Cited by 10 publications

References 30 publications

A Pulsar Vector Observation-Based Link Acquisition Method for X-Ray Communications

A Pulsar Vector Observation-Based Link Acquisition Method for X-Ray Communications

Stellar Angle-Aided Pulse Phase Estimation and Its Navigation Application

Fast On-Orbit Pulse Phase Estimation of X-Ray Crab Pulsar for XNAV Flight Experiments

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