22Years of AJISAI spin period determination from standard SLR and kHz SLR data

Kucharski, D.; Kirchner, Georg; Otsubo, Toshimichi; Koidl, Franz

doi:10.1016/j.asr.2009.05.007

Cited by 17 publications

(6 citation statements)

References 15 publications

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“…В статті [7] автори наводять подібні дослідження даного супутника за 22 роки існування його на орбіті. При цьому кое-фіцієнти функції відрізняються від отри-маних нами та становлять а=1.488586, b=0.0149802.…”

Section: вступunclassified

Studying of the own rotation period changes of satellite "Ajisai" on the interval 1986-2017

Кудак¹,

Perig²,

Найбауер³

2017

Sci.Herald.Uzh.Univ.Ser.Phys

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Section: вступunclassified

Studying of the own rotation period changes of satellite "Ajisai" on the interval 1986-2017

Кудак¹,

Perig²,

Найбауер³

2017

Sci.Herald.Uzh.Univ.Ser.Phys

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“…The satellite was placed in a quasi-circular orbit at a height of 1490 km (inclination 50º). The spin parameters of Ajisai have been investigated scientifically (Kucharski et al, 2009b, 2010a, 2010b, Otsubo et al, 19982000) showing an exponential decrease of the spin rate and a precession of its spin axis. The knowledge of the spin parameters of the passive satellites allows for the investigation and improvement of physical models of the perturbing forces and torques which are of magnetic, gravitational and non-gravitational nature (Andrés et al, 2004, Bertotti et al, 1991.…”

Section: The Experimental Geodetic Satellitementioning

confidence: 99%

“…-slowly spinning LAGEOS-1, LAGEOS-2 (Kucharski et al, 2007, Kucharski et al, 2009a, -High Earth Orbiting Etalon-1 and Etalon-2 (Kucharski et al, 2008), -fast spinning Ajisai (Kirchner et al, 2007;Kucharski et al, 2009bKucharski et al, , 2010aKucharski et al, , 2010b, -active Gravity Probe -B, equipped with a small CCR panel, -the first spherical lens type satellite BLITS (Kucharski et al, 2011).…”

Section: Techniques For Spin Measurementsmentioning

confidence: 99%

Spectral Analysis of Borowiec SLR Data For Spin Determination Of Geodetic Satellite EGP

Kucharski¹,

Schillak²,

Lim³

et al. 2013

Artificial Satellites

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Borowiec 10 Hz Satellite Laser Ranging (SLR) station is capable to measure spin of the Japanese Experimental Geodetic Satellite (EGP). Spectral analysis of 391 passes measured from March 10, 1994 to November 27, 2009 gives frequency signal representing the 3 rd and the 6 th harmonics of the satellite spin rate. Analysis of this signal, corrected for the apparent effects, indicates en exponential slowing down of the satellite: the spin rate decreases according to the equation f = 671.115907 • exp(-4.08324 x 10 -5 • D) [mHz], where D is a day after launch. More than 15 years of the SLR measurements allowed investigating the initial spin rate of the satellite f ini = 671.116, RMS = 0.203 [mHz] (initial spin period T ini = 1.49006, RMS = 0.0007 [s]).

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“…Objective of the mission is the precise positioning of fiducial points on the Japanese Islands and testing of NASDA's two-stage launch vehicle (Otsubo et al, 1994). The satellite is equipped with 1440 uncoated fused silica corner cube reflectors for SLR (see Figure 2), arranged in the form of 15 rings around the symmetry axis (Kucharski et al, 2009). AJISAI is also equipped with 318 mirrors used for the optical/CCD observations.…”

Section: Ajisaimentioning

confidence: 99%

Impact of the Atmospheric Drag on Starlette, Stella, Ajisai, and Lares Orbits

Sośnica

2015

Artificial Satellites

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ABSTRACT.The high-quality satellite orbits of geodetic satellites, which are determined using Satellite Laser Ranging (SLR) observations, play a crucial role in providing, e.g., low-degree coefficients of the Earth's gravity field including geocenter coordinates, Earth rotation parameters, as well as the SLR station coordinates. The appropriate modeling of non-gravitational forces is essential for the orbit determination of artificial Earth satellites. The atmospheric drag is a dominating perturbing force for satellites at low altitudes up to about 700-1000 km. This article addresses the impact of the atmospheric drag on mean semi-major axes and orbital eccentricities of geodetic spherical satellites: Starlette, Stella, AJISAI, and LARES. Atmospheric drag causes the semi-major axis decays amounting to about Δa = −1.2, −12, −14, and −30 m/year for LARES, AJISAI, Starlette, and Stella, respectively. The density of the upper atmosphere strongly depends on the solar and geomagnetic activity. The atmospheric drag affects the along-track orbit component to the largest extent, and the out-of-plane to a small extent, whereas the radial component is almost unaffected by the atmospheric drag.

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22Years of AJISAI spin period determination from standard SLR and kHz SLR data

Cited by 17 publications

References 15 publications

Studying of the own rotation period changes of satellite "Ajisai" on the interval 1986-2017

Studying of the own rotation period changes of satellite "Ajisai" on the interval 1986-2017

Spectral Analysis of Borowiec SLR Data For Spin Determination Of Geodetic Satellite EGP

Impact of the Atmospheric Drag on Starlette, Stella, Ajisai, and Lares Orbits

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