Anisotropic reflection effect on satellite, Ajisai

Sengoku, A.; Cheng, M. K.; Schutz, B. E.

doi:10.1007/bf00943689

Cited by 22 publications

(13 citation statements)

References 7 publications

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“…This result comes from • the fact that the normal component becomes largest and the satellite occasionally enters the shadow of the Moon in this month. As Sengoku et al (1995) showed, effect of the normal component on the orbit appears more definitely during the shadowing periods. For example, averaged along-track acceleration due to normal component over one revolution doesn't vanish during the shadowing periods, and hence, the perturbation in semimajor axis appears from zero-th order in eccentricity.…”

Section: Simulation Of the Tracking Data Reduction Of The Relay Satelmentioning

confidence: 88%

Solar radiation pressure model for the relay satellite of SELENE

Kubota¹,

Sengoku²

2014

Earth Planet Sp

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A new radiation pressure model of the relay satellite of SELENE has been developed. The shape of the satellite was assumed to be a combination of a regular octagonal pillar and a column. Radiation forces acting on each part of the spacecraft were calculated independently and summed vectorially to obtain the mean acceleration of the satellite center of mass. We incorporated this new radiation pressure model into the orbit analysis software GEODYN-II and simulated the tracking data reduction process of the relay satellite. We compared two models: one is the new radiation pressure model developed in this work and the other a so-called "cannonball model" where the shape of the satellite is assumed to be a sphere. By the analysis of simulated two-way Doppler tracking data, we found that the new radiation pressure model reduces the observation residuals compared to the cannonball model. Moreover, we can decrease errors in the estimated lunar gravity field coefficients significantly by use of the new radiation pressure model.

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Section: Simulation Of the Tracking Data Reduction Of The Relay Satelmentioning

confidence: 88%

Solar radiation pressure model for the relay satellite of SELENE

Kubota¹,

Sengoku²

2014

Earth Planet Sp

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“…The Drag Temperature Model (DTM) (Barlier et al, 1978) was adopted in the analysis since its accuracy is supposed to be superior to other models for Ajisai (Cheng, private communication, 1994). One component of radiation pressure, the anisotropic reflection model (Sengoku et al, 1995) was used for the solar radiation pressure force. The other components included were associated with the Earth.…”

Section: Force Models Measurement Models and Reference Frames Force mentioning

confidence: 99%

A plate motion study using Ajisai SLR data

Sengoku¹

2014

Earth Planet Sp

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Eight years of Ajisai SLR data were processed to determine the terrestrial reference frame and its time evolution. The typical precision and accuracy of the estimated geocenter position averaged over a year determined from a oneyear Ajisai SLR data set are 1 cm and 1.5 cm, respectively. The baselines between SLR stations away from plate boundaries show rates of change that are in good agreement with NUVEL-1A, ITRF93 and LAGEOS results but significant deviations from geologically determined plate motion models are found for stations in plate boundary regions. Velocities of the observation stations were estimated by a weighted least squares method. The Simosato SLR station, located 100 km away from the plate boundary between the Eurasian plate and the Philippine Sea plate, moves in the direction of the subduction of the Philippine Sea plate with respect to the Eurasian plate, which infers strong coupling of the two plates at the boundary. The motion of other stations at plate boundary regions is also discussed. This study is the first attempt to use Ajisai SLR data to determine the global terrestrial reference frame and its variation, thus independent of the previous SLR studies most of which were based on LAGEOS SLR analyses.

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“…The effect of the direct solar radiation pressure on Ajisai has been studied in Sengoku et al (1995). For an axially symmetric, but not spherically symmetric, satellite like Ajisai, there is a component of the radiation pressure acceleration directed along the sun-satellite direction a (iso) ⊙ and another smaller component perpendicular to the sun-satellite direction.…”

Section: The Thermal and Radiative Forcesmentioning

confidence: 99%

On the use of Ajisai and Jason-1 satellites for tests of general relativity

Iorio¹

2006

New Astronomy

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In this paper we analyze in detail some aspects of the proposed use of Ajisai and Jason-1, together with the LAGEOS satellites, to measure the general relativistic Lense-Thirring effect in the gravitational field of the Earth. A linear combination of the nodes of such satellites is the proposed observable. The systematic error due to the mismodelling in the uncancelled even zonal harmonics would be ∼ 1% according to the latest present-day CHAMP/GRACE-based Earth gravity models. In regard to the non-gravitational perturbations especially affecting Jason-1, only relatively high-frequency harmonic perturbations should occur: neither semisecular nor secular bias of non-gravitational origin should affect the proposed combination: their maximum impact is evaluated to ∼ 4% over 2 years. Our estimation of the root-sum-square total error is about 4-5% over at least 3 years of data analysis required to average out the uncancelled tidal perturbations.

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Anisotropic reflection effect on satellite, Ajisai

Cited by 22 publications

References 7 publications

Solar radiation pressure model for the relay satellite of SELENE

Solar radiation pressure model for the relay satellite of SELENE

A plate motion study using Ajisai SLR data

On the use of Ajisai and Jason-1 satellites for tests of general relativity

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