Lunar and Solar Perturbations on Satellite Orbits

Upton, E.; Bailie, A.; Musen, P.

doi:10.1126/science.130.3390.1710

Cited by 18 publications

(23 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To test this, primary cultures of trypsin-dispersed monkey-kidney cells were prepared in a medium similar to that of Healy et ah (3), containing 15 percent of beef serum. Subcultures were prepared with populations which allowed about a sixfold increase in cell numbers, and growth and virus studies were made with the various cultures.…”

Section: Monkey-kidney Cellsmentioning

confidence: 99%

Virus Production by Subcultured Monkey-Kidney Cells

Lieberman

Youngner

Ove

1960

Science

View full text Add to dashboard Cite

show abstract

Section: Monkey-kidney Cellsmentioning

confidence: 99%

Virus Production by Subcultured Monkey-Kidney Cells

Lieberman

Youngner

Ove

1960

Science

View full text Add to dashboard Cite

show abstract

“…The perturbing gravitational forces of the Moon and the Sun acting on Earth satellites cause both secular and fast periodic variations to the orbital elements (Upton et al, 1959;Hughes, 1980). For near-Earth satellites the effects of these distant perturbing bodies are often negligible,comparison to that of the Earth's oblateness, but for satellite orbits that are very elongated or have semimajor axes of several Earth radii, these third-body gravitational perturbations can change the elements of the orbit to a measurable extent, albeit on longer timescales than the Earth's oblateness.…”

Section: Dynamical Modelmentioning

confidence: 99%

Dynamical cartography of Earth satellite orbits

Rosengren

Skoulidou

Tsiganis

et al. 2019

Advances in Space Research

View full text Add to dashboard Cite

We have carried out a numerical investigation of the coupled gravitational and non-gravitational perturbations acting on Earth satellite orbits in an extensive grid, covering the whole circumterrestrial space, using an appropriately modified version of the SWIFT symplectic integrator, which is suitable for long-term (120 years) integrations of the non-averaged equations of motion. Hence, we characterize the long-term dynamics and the phase-space structure of the Earth-orbiter environment, starting from low altitudes (400 km) and going up to the GEO region and beyond. This investigation was done in the framework of the EC-funded ''ReDSHIFT" project, with the purpose of enabling the definition of passive debris removal strategies, based on the use of physical mechanisms inherent in the complex dynamics of the problem (i.e., resonances). Accordingly, the complicated interactions among resonances, generated by different perturbing forces (i.e., lunisolar gravity, solar radiation pressure, tesseral harmonics in the geopotential) are accurately depicted in our results, where we can identify the regions of phase space where the motion is regular and long-term stable and regions for which eccentricity growth and even instability due to chaotic behavior can emerge. The results are presented in an ''atlas" of dynamical stability maps for different orbital zones, with a particular focus on the (drag-free) range of semimajor axes, where the perturbing effects of the Earth's oblateness and lunisolar gravity are of comparable order. In some regions, the overlapping of the predominant lunisolar secular and semi-secular resonances furnish a number of interesting disposal hatches at moderate to low eccentricity orbits. All computations were repeated for an increased area-to-mass ratio, simulating the case of a satellite equipped with an on-board, area-augmenting device. We find that this would generally promote the deorbiting process, particularly at the transition region between LEO and MEO. Although direct reentry from very low eccentricities is very unlikely in most cases of interest, we find that a modest ''delta-v" (DV ) budget would be enough for satellites to be steered into a relatively short-lived resonance and achieve reentry into the Earth's atmosphere within reasonable timescales (50 years).

show abstract

“…To test this, primary cultures of trypsin-dispersed monkey-kidney cells were prepared in a medium similar to that of Healy et al (3), containing 15 percent of beef serum. Subcultures were prepared with populations which allowed about a sixfold increase in cell numbers, and growth and virus studies were made with the various cultures.…”

Section: Virus Production By Subcultured Monkey-kidney Cellsmentioning

confidence: 99%

Perturbations in Perigee Height of Vanguard I

Musen

Bryant

Bailie

1960

Science

Self Cite

View full text Add to dashboard Cite

The effect of solar radiation pressure on the perigee height of satellite 1958ss(2) (Vanguard I) has been considered. Previous consideration of the effect of the third hairmonic and the lunar and solar gravitational perturbations left an unexplained discrepancy between the observed and calculated values of perigee height. The inclusion of the effect of radiation pressure leads to close agreement between the orbit data and the theoretical results for Vanguard I.

show abstract

Lunar and Solar Perturbations on Satellite Orbits

Cited by 18 publications

References 2 publications

Virus Production by Subcultured Monkey-Kidney Cells

Virus Production by Subcultured Monkey-Kidney Cells

Dynamical cartography of Earth satellite orbits

Perturbations in Perigee Height of Vanguard I

Contact Info

Product

Resources

About