Gravitational wave detection in space

Ni, Wei-Tou

doi:10.1142/9789814635134_0012

Cited by 6 publications

(4 citation statements)

References 66 publications

(96 reference statements)

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“…The TDI was first used in the study of ASTROD mission concept. [27,28,45] In the deep-space interferometry, long distances are invariably involved. Due to long distances, laser light is attenuated to a great extent is needed.…”

Section: Basics Of Time Delay Interferometrymentioning

confidence: 99%

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Orbit optimization and time delay interferometry for inclined ASTROD-GW formation with half-year precession-period

Wang

2015

Chinese Phys. B

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ASTROD-GW (ASTROD [Astrodynamical Space Test of Relativity using OpticalDevices] optimized for Gravitational Wave detection) is a gravitational-wave mission with the aim of detecting gravitational waves from massive black holes, extreme mass ratio inspirals (EMRIs) and galactic compact binaries, together with testing relativistic gravity and probing dark energy and cosmology. Mission orbits of the 3 spacecrafts forming a nearly equilateral triangular array are chosen to be near the Sun-Earth Lagrange points L3, L4 and L5. The 3 spacecrafts range interferometrically with one another with arm length about 260 million kilometers. For 260 times longer arm length, the detection sensitivity of ASTROD-GW is 260 fold better than that of eLISA/NGO in the lower frequency region by assuming the same acceleration noise.Therefore, ASTROD-GW will be a better cosmological probe. In previous papers, we have worked out the time delay interferometry (TDI) for the ecliptic formation. To resolve the reflection ambiguity about the ecliptic plane in source position determination, we have changed the basic formation into slightly inclined formation with half-year precession-period. In this paper, we optimize a set of 10-year inclined ASTROD-GW mission orbits numerically using ephemeris framework starting at June 21, 2035, including cases of inclination angle is 0° (no inclination), 0.5°, 1.0°, 2 1.5°, 2.0°, 2.5° and 3.0°. We simulate the time delays of the first and second generation TDI configurations for the different inclinations, and compare/analyse the numerical results to attain the requisite sensitivity of ASTROD-GW by suppressing laser frequency noise below the secondary noises. To explicate our calculation process for different inclination cases, we take the 1.0° as example to show the orbit optimization and TDI simulation.

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Section: Basics Of Time Delay Interferometrymentioning

confidence: 99%

“…The TDI was first used in the study of ASTROD mission concept. [27,28,46] In the deep-space interferometry, long distances are invariably involved. Due to long distances, laser light is attenuated to a great extent at the receiving spacecraft.…”

Section: Basics Of Time Delay Interferometrymentioning

confidence: 99%

Orbit optimization and time delay interferometry for inclined ASTROD-GW formation with half-year precession-period

Wang

2015

Chinese Phys. B

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“…除 LISA、太极和天琴计划外，在空间引力波探测发展过程中，为覆盖不同频段，科学家们提出了不同轨道、不同臂长、不同原理的探测计划。如覆盖空间引力波与地面引力波探测间频段空白(0.1~10Hz) 的 DECIGO(DECi-hertz Interferometer Gravitational wave Observatory) [4] ，臂长更长频段更低的 ASTROD-GW ( Astrodynamical Space Test of Relativity using Optical Devices，Gravitational Wave) ，臂长短探测精度更高的中频引力波探测 BBO (Big Bang Observer)，更为宏伟的木星轨道任务 Super-ASTROD，以及地球轨道的 ASTROD-EM/LAGRANGE、OMEGA 等 [28] 。空间引力波探测计划主要分为两种轨道结构，即日心轨道和地心轨道 [26] 。其优缺点如下：日心轨道的主要优点是环境稳定性好、三星编队的呼吸角小，主要缺点是离地球比较远，最近约为5 × 10 [29] 。本章只对干涉仪系统进行介绍，主要包括激光器、望远镜、光学平台以及相关的数据后处理系统(相位计) [30] ，各部件之间的联系如图 4 所示。…”

Section: 其他计划unclassified

面向空间引力波探测的激光干涉技术研究进展及展望

Wang,

Qi,

Wang

et al. 2024

Sci. Sin.-Phys. Mech. Astron.

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“…In these projects, three or more spacecraft are arranged in an equilateral triangle, and lasers are employed to measure the minute distance variations driven by gravitational waves. Compared with the ground detector, the space-based gravitational wave detector has the characteristics of a long baseline distance, fewer noise and interference sources, and the ability to detect gravitational waves from all directions, which make it especially suitable for capturing weaker gravitational wave signals in medium- and low-frequency bands [ 7 ]. However, space gravitational wave detectors present various challenges in their design and operation, among which the configuration maintenance and control of the precision formation flying is the most fundamental and urgent difficulty [ 1 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Continuous Low-Thrust Maneuver Planning for Space Gravitational Wave Formation Reconfiguration Based on Improved Particle Swarm Optimization Algorithm

Wang

Lian

et al. 2023

Sensors

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This study proposes a three-spacecraft formation reconfiguration strategy of minimum fuel for space gravitational wave detection missions in the high Earth orbit (105 km). For solving the limitations of measurement and communication in long baseline formations, a control strategy of a virtual formation is applied. The virtual reference spacecraft provides a desired relative state between the satellites, which is then used to control the motion of the physical spacecraft to maintain the desired formation. A linear dynamics model based on relative orbit elements’ parameterization is used to describe the relative motion in the virtual formation, which facilitates the inclusion of J2, SRP, and lunisolar third-body gravity effects and provides a direct insight into the relative motion geometry. Considering the actual flight scenarios of gravitational wave formations, a formation reconfiguration strategy based on continuous low thrust is investigated to achieve the desired state at a given time while minimizing interference to the satellite platform. The reconfiguration problem is considered a constrained nonlinear programming problem, and an improved particle swarm algorithm is developed to solve this problem. Finally, the simulation results demonstrate the performance of the proposed method in improving the maneuver sequence distribution and optimizing maneuver consumption.

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Gravitational wave detection in space

Cited by 6 publications

References 66 publications

Orbit optimization and time delay interferometry for inclined ASTROD-GW formation with half-year precession-period

Orbit optimization and time delay interferometry for inclined ASTROD-GW formation with half-year precession-period

面向空间引力波探测的激光干涉技术研究进展及展望

Continuous Low-Thrust Maneuver Planning for Space Gravitational Wave Formation Reconfiguration Based on Improved Particle Swarm Optimization Algorithm

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