Design of ASTROD-GW Orbit

Jinrui, Men; Ni, Wei-Tou; Wang, Gang

doi:10.1016/j.chinastron.2010.10.008

Cited by 27 publications

(37 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[38,39] Since the preparation of the mission may take longer time, in our second optimization, we start at noon, June 21, 2028 (JD2461944.0) and optimize for a period of 20 years for doing numerical TDIs. [31][32][33][34] In this paper, we optimize the orbit configurations of ASTROD-GW for 10 years for the cases with the inclination angle 0.5º, 1º, 1.5º, 2º, 2.5º and 3º to the ecliptic plane starting at noon, June 21, 2035 (JD2464500.0) for reason explained in the Introduction.…”

Section: Mission Orbit Optimizationmentioning

confidence: 99%

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

Wang

2015

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Mission Orbit Optimizationmentioning

confidence: 99%

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

Wang

2015

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…LISA orbit configuration has been studied analytically and numerically in various previous works (Vincent and Bender, 1987;Folkner et al, 1997;Cutler, 1998;Hughes, 2002;Hechler and Folkner, 2003;Dhurandhar et al, 2005;Yi et al, 2008;Li et al, 2008;Dhurandhar, Ni, and Wang 2013). We have also used the CGC ephemeris framework to numerically optimize the orbit configuration of eLISA/NGO (Wang and Ni, 2013a) and a LISA-type mission with 2  Gm nominal arm length (Wang and Ni, 2013a), as well as that of ASTROD-GW (Men et al, 2009(Men et al, , 2010Wang and Ni, 2011, 2013b.…”

Section: New Lisa Taiji and Other Lisa-like Mission Orbit Optimizationsmentioning

confidence: 99%

Numerical simulation of time delay interferometry for TAIJI and new LISA

Wang

2019

Res. Astron. Astrophys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[85]; these initial conditions are listed in column 3 of Table 2 in Sec 7.1. With this orbit choice, we started numerical orbit design and used the CGC ephemeris to numerically optimize the orbit configuration in [85] as we have done for ASTROD-GW orbit [134][135][136]139,86,87 design. In this subsection, we review and summarize the procedure following [85].…”

Section: Numerical Orbit Design and Orbit Optimization For Elisa/ngomentioning

confidence: 99%

“…In our first optimization, the time of start of the science part of the mission is chosen to be noon, June 21, 2025 (JD2460848.0) and the optimization is for a period of 3700 days using CGC 2.5 ephemeris. [134][135][136] Since the preparation of the mission may take longer time and there is a potential that the extended mission life time may be longer than 10 years, in later optimizations, 139,86,87 we started at noon, June 21, 2028 (JD2461944.0) and optimize for a period of 20 years using CGC 2.7 ephemeris including more asteroids than those of CGC 2.5. In both of these optimizations, the orbit configuration is set in the ecliptic plane and we have the inclination angle λ = 0.…”

mentioning

confidence: 99%

Gravitational wave detection in space

2017

One Hundred Years of General Relativity

Self Cite

View full text Add to dashboard Cite

Design of ASTROD-GW Orbit

Cited by 27 publications

References 8 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

Numerical simulation of time delay interferometry for TAIJI and new LISA

Gravitational wave detection in space

Contact Info

Product

Resources

About