Accurate and Robust Synchronous Extraction Algorithm for Star Centroid and Nearby Celestial Body Edge

Zhang, Yong; Jiang, Jie; Zhang, Guangjun; Lu, Yan

doi:10.1109/access.2019.2939148

Cited by 16 publications

(10 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The celestial body imaging model is the convolution of the cumulative energy distribution of the optical sensor system with the PSF [3],…”

Section: Simulated Images Of Celestial Bodiesmentioning

confidence: 99%

“…Light-small is the development direction of the optical sensor system in deep space exploration [1][2][3]. This requires the system to execute multiple functions on the same hardware platform [2].…”

Section: Introductionmentioning

confidence: 99%

“…This requires the system to execute multiple functions on the same hardware platform [2]. In our previous work, we proposed a miniaturized independent optical sensor system that can provide altitude and navigation information for spacecraft based on optical imaging measurement [3]. Those remotely sensed astronomical images are crucially important for future studies of celestial bodies [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compression of Remotely Sensed Astronomical Image Using Wavelet-Based Compressed Sensing in Deep Space Exploration

2021

Self Cite

View full text Add to dashboard Cite

Compression of remotely sensed astronomical images is an essential part of deep space exploration. This study proposes a wavelet-based compressed sensing (CS) algorithm for astronomical image compression in a miniaturized independent optical sensor system, which introduces a new framework for CS in the wavelet domain. The algorithm starts with a traditional 2D discrete wavelet transform (DWT), which provides frequency information of an image. The wavelet coefficients are rearranged in a new structured manner determined by the parent–child relationship between the sub-bands. We design scanning modes based on the direction information of high-frequency sub-bands, and propose an optimized measurement matrix with a double allocation of measurement rate. Through a single measurement matrix, higher measurement rates can be simultaneously allocated to sparse vectors containing more information and coefficients with higher energy in sparse vectors. The double allocation strategy can achieve better image sampling. At the decoding side, orthogonal matching pursuit (OMP) and inverse discrete wavelet transform (IDWT) are used to reconstruct the image. Experimental results on simulated image and remotely sensed astronomical images show that our algorithm can achieve high-quality reconstruction with a low measurement rate.

show abstract

“…The celestial body imaging model is the convolution of the cumulative energy distribution of the optical sensor system with the PSF [3],…”

Section: Simulated Images Of Celestial Bodiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compression of Remotely Sensed Astronomical Image Using Wavelet-Based Compressed Sensing in Deep Space Exploration

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…It shows three different authors’ [ 15 , 16 , 17 ] data on how the Grid algorithm [ 18 ] behaves with the presence of positional noise, using different test configurations for field of view (

), resolution (

), maximum visual magnitude (

), and grid size g . Different star simulators were also used, and the implementation of Grid likely differs between researches [ 19 , 20 ].…”

Section: Related Workmentioning

confidence: 99%

Universal Verification Platform and Star Simulator for Fast Star Tracker Design

Schulz

Marcelino

Seman

et al. 2021

Sensors

View full text Add to dashboard Cite

Developing star trackers quickly is non-trivial. Achieving reproducible results and comparing different algorithms are also open problems. In this sense, this work proposes the use of synthetic star images (a simulated sky), allied with the standardized structure of the Universal Verification Methodology as the base of a design approach. The aim is to organize the project, speed up the development time by providing a standard verification methodology. Future rework is reduced through two methods: a verification platform that us shared under a free software licence; and the layout of Universal Verification Methodology enforces reusability of code through an object-oriented approach. We propose a black-box structure for the verification platform with standard interfaces, and provide examples showing how this approach can be applied to the development of a star tracker for small satellites, targeting a system-on-a-chip design. The same test benches were applied to both early conceptual software-only implementations, and later optimized software-hardware hybrid systems, in a hardware-in-the-loop configuration. This test bench reuse strategy was interesting also to show the regression test capability of the developed platform. Furthermore, the simulator was used to inject specific noise, in order to evaluate the system under some real-world conditions.

show abstract

“…In this paper, a kind of classical celestial measurements, starlight angles, are used for CBCS orientation. This angle can be measured by combining a wide field-of-view camera and a startracker, which, respectively, measures the line-of sight of the central body and the remote stars [21][22] . The measurement schematic is shown in Fig.3.…”

Section: B Orientation Determination Based On Starlight Measurementsmentioning

confidence: 99%

Fully Decentralized Cooperative Navigation for Spacecraft Constellations

Qin

Macdonald

Dong

2021

IEEE Trans. Aerosp. Electron. Syst.

View full text Add to dashboard Cite

This paper proposes a method to decentralize the navigation burden, and improve the fault tolerance for a spacecraft constellation. The constellation body reference system is introduced, which is the perifocal frame of one satellite in the constellation. The structure of the proposed navigation method is constructed to enable each spacecraft to estimate its own orbit in this body reference system. This step is essentially the relative orbit determination based on inter-satellite range measurements. Thereafter, the approach to transfer an orbit from the constellation body reference system to inertial reference system is developed. The essential requirements on absolute

show abstract

Accurate and Robust Synchronous Extraction Algorithm for Star Centroid and Nearby Celestial Body Edge

Cited by 16 publications

References 34 publications

Compression of Remotely Sensed Astronomical Image Using Wavelet-Based Compressed Sensing in Deep Space Exploration

Compression of Remotely Sensed Astronomical Image Using Wavelet-Based Compressed Sensing in Deep Space Exploration

Universal Verification Platform and Star Simulator for Fast Star Tracker Design

Fully Decentralized Cooperative Navigation for Spacecraft Constellations

Contact Info

Product

Resources

About