Formationkeeping strategies for GEO halo collocation

Chao, C. C.; Peterson, Glenn E.; Menn, Michael

doi:10.2514/6.2000-4136

Cited by 2 publications

(4 citation statements)

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“…Furthermore, when the right-hand side is integrated over q5 the only remaining term is 1;'). Hence, the integral over , u takes the form (4) where we approximate the integral with a quadrature sum with weights wi and abscissae pi. There are several techniques for determining the optimal values of wi and pi including Gauss quadrature and Chebychev equal weight quadrature [6].…”

Section: How Do We Estimate the Radiative Forcing?mentioning

confidence: 99%

“…Perturbations such as the Earth's oblateness (mainly 52) and atmospheric drag induce secular drifts between the spacecraft which, if not corrected, will cause formation separation. Consequently, we develop maintenance strategies based on work by Chao [4].…”

Section: Av Budgetmentioning

confidence: 99%

“…Therefore, the maneuver strategy focuses on maintaining the argument of periapsis. Chao et al [4] developed a method to fmd the optimal locations of two symmetrical tangential burns to change the argument of periapsis without changing the other orbital elements. The true anomaly to provide an optimal maneuver depends on the desired change in argument of periapsis, and the eccentricity:…”

Section: Formation Maintenancementioning

confidence: 99%

“…A similar strategy, based on work by Chao et,aZ. [4], is used to determine the AV budget for formation-keeping in the presence of perturbations.…”

Section: Introductionmentioning

confidence: 99%

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A preliminary formation flying orbit dynamics analysis for Leonardo-BRDF

Hughes¹,

Mailhe²

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)

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Leonardo-BRDF is a new NASA mission concept proposed to allow the investigation of radiative transfer and its effect on the Earth's climate and atmospheric phenomenon. Enabled by the recent developments in small-satellite and formation flying technology, the mission is envisioned to be composed of an array of spacecraft in carefully designed orbits. The different perspectives provided by a distributed array of spacecraft offer a unique advantage to study the Earth's albedo. This paper presents the flight dynamics analysis performed in the context of the Leonardo-BRDF science requirements. First, the albedo integral is investigated and the effect of viewing geometry on science return is studied. The method used in this paper, based on Gauss quadrature, provides the optimal formation geometry to ensure that the value of the integral is accurately approximated. An orbit design approach is presented to achieve specific relative orbit geometries while simultaneously satisfying orbit dynamics constraints to reduce formation-keeping fuel expenditure. The relative geometry afforded by the design is discussed in terms of mission requirements. An optimal Lambert initialization scheme is presented with the required AV to distribute all spacecraft from a common parking orbit into their appropriate orbits in the formation. Finally, formation-keeping strategies are developed and the associated AV's are calculated to maintain the formation in the presence of perturbations.

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Section: How Do We Estimate the Radiative Forcing?mentioning

confidence: 99%

Section: Av Budgetmentioning

confidence: 99%

Section: Formation Maintenancementioning

confidence: 99%

“…A similar strategy, based on work by Chao et,aZ. [4], is used to determine the AV budget for formation-keeping in the presence of perturbations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations