Predictive filtering-based fast reacquisition approach for space-borne acquisition, tracking, and pointing systems

Bai, Shan; Wang, Yunlong; Qiang, Jia; Zhang, Liang; Wang, Juanjuan

doi:10.1364/oe.22.026462

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…As the Tiangong-2 space lab circles the earth with a speed of about 7.7 km/s and the beam divergence is only 35 𝜇rad, a high-precision acquisition, tracking and pointing (ATP) system [25] becomes an essential component to establish the link between the space lab and the ground station. Both the transmitter and the receiver have a two-stage ATP system, which has a coarse tracking loop and a fine tracking loop.…”

Section: -2mentioning

confidence: 99%

Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab

Liao

Lin

Ren

et al. 2017

Chinese Phys. Lett.

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Quantum technology establishes a foundation for secure communication via quantum key distribution (QKD). In the last two decades, the rapid development of QKD makes a global quantum communication network feasible. In order to construct this network, it is economical to consider small-sized and low-cost QKD payloads, which can be assembled on satellites with different sizes, such as space stations. Here we report an experimental demonstration of space-to-ground QKD using a small-sized payload, from Tiangong-2 space lab to Nanshan ground station. The 57.9-kg payload integrates a tracking system, a QKD transmitter along with modules for synchronization, and a laser communication transmitter. In the space lab, a 50 MHz vacuum + weak decoy-state optical source is sent through a reflective telescope with an aperture of 200 mm. On the ground station, a telescope with an aperture of 1200 mm collects the signal photons. A stable and high-transmittance communication channel is set up with a high-precision bidirectional tracking system, a polarization compensation module, and a synchronization system. When the quantum link is successfully established, we obtain a key rate over 100 bps with a communication distance up to 719 km. Together with our recent development of QKD in daylight, the present demonstration paves the way towards a practical satellite-constellation-based global quantum secure network with small-sized QKD payloads.

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Section: -2mentioning

confidence: 99%

Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab

Liao

Lin

Ren

et al. 2017

Chinese Phys. Lett.

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“…In this paper, the simple model B of IAU2000 nutation model is adopted, in which the time T represents the mechanical time starting from the J2000.0 standard epoch, taking the Julian century as the unit. [10] The calculation of Huangjing nutation and inclination nutation is as follows.…”

Section: Nutationmentioning

confidence: 99%

“…In the traditional sense, signal sampling and processing will go through a complex process, in which the sampling frequency cannot be less than twice the highest frequency of the signal spectrum [10] . The emergence of compressed sensing can distinguish and measure the signal according to the reconstruction algorithm on the basis of collecting the measured value of the signal by combining compression and sampling [13] as shown in Fig.…”

Section: Modulation Matrix Designmentioning

confidence: 99%

Coded aperture compressive imaging using dynamic range modulation for optical communication

Jia

2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

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The establishment of satellite-to-ground high-speed laser communication link needs to maintain high speed, high precision and high sensitivity, but the beacon signal becomes weaker following the ultra-long-distance transmission between the sending end and receiving end. Considering the problem of rapid attenuation of free space communication optical signals in the future development of high-orbit inter-satellite and inter-satellite transmission, this paper proposes a method of dynamic range compression modulation of coded aperture to improve the accuracy, rate and sensitivity of optical signal imaging acquisition in high-speed laser communication links. Further combined with coordinate system correction, highspeed, high-sensitivity and high-precision satellite-to-ground laser tracking and communication link maintenance can be achieved. Finally, the feasibility of dynamic range compression modulation of coded aperture for optical communication measurement is verified by the design and simulation of laser communication beacon optical modulation matrix, which provides the possibility for its wide application.

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“…Then the incident angle βy of the beam in the Y direction can be expressed by using (2) sin arctan cos The schematic diagram for the downward case is shown in Fig. 2(b).…”

Section: A For the Pitch And Yaw Anglesmentioning

confidence: 99%

A Lens-Array-Based Measurement Technique for Spatial Angle

et al. 2022

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The accurate measurement of spatial angle is the key technology for the plane flatness and guide rail straightness detections. This paper presents a lens-array-based optical system and an analytical model for micro spatial angle measurement. In this system, a collimated light beam passes through a fourarray-lenses arranged in pyramid shape and forms a regular array spots on CCD (Charge Coupled Device) sensor. The angels with respect to the axes of X, Y are calculated by analyzing the distance of these spots on the CCD, the distance between adjacent apertures on the lens array and the inclination angle between the lens array and the CCD. Using the Coordinate value of array spots on CCD, the angle around Z axis also can be calculated simultaneously. Finally, the accuracy of the proposed method is verified by comparing the measured results with the autocollimator, and it is shown that the proposed approach enabled to achieve RMS≤0.1″. Additionally, this measurement system which is consists of a laser source, lens arrays and CCD, compared with other methods, is smaller in volume and more convenient to carry.INDEX TERMS Image edge detection, Measurement by laser beam, Optical arrays.

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Predictive filtering-based fast reacquisition approach for space-borne acquisition, tracking, and pointing systems

Cited by 11 publications

References 13 publications

Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab

Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab

Coded aperture compressive imaging using dynamic range modulation for optical communication

A Lens-Array-Based Measurement Technique for Spatial Angle

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