Antenna radiation effects on the orbits of GPS and INTELSAT satellites

Heilmann, Armando; Ferreira, Luiz Danilo Damasceno; Dartora, C. A.; Nóbrega, K.Z.

doi:10.1016/j.actaastro.2013.02.009

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…The thermal reemission perturbations deviations, from the differences between reference orbit and perturbed orbit, can be better visualized in the RNT coordinate system with the origin at the satellite center of mass. In this system, the radial component R is defined in the direction and sense of the satellite geocentric radius vector, the normal component N is perpendicular to the orbital plane and the component along track T is perpendicular to R and N and is also along the velocity vector (Seeber 2003, pp.87;Heilmann et al 2013). The equations of the deviations produced on RNT components are presented in Appendix A.…”

Section: Equations Of Motionmentioning

confidence: 99%

A procedure for assessing the thermal reemission effects on CBERS 04A

FERREIRA

Moraes

2022

Bol. Ciênc. Geod.

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Thermal reemission affects satellite orbits when a recoil force results from the emission of radiation from the satellite surface. In this study, the analysis of the thermal reemission force on the satellite is made separately, that is, when the satellite (CBERS 04A's main body and the solar panels) are hit by the sunlight and when the satellite is into the shadow. Thus, it is presented an expression in an exponential form in order to explain the behavior of the perturbation due to thermal reemission on the panels when they are inside the Earth's shadow. Both the time spent into the shadow and the relaxation time of the solar panels allowed an analysis of the behavior of the disturbing acceleration and of the orbital elements, during cooling and heating processes. The results presented in this study are promising in terms of practical applications.

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Section: Equations Of Motionmentioning

confidence: 99%

A procedure for assessing the thermal reemission effects on CBERS 04A

FERREIRA

Moraes

2022

Bol. Ciênc. Geod.

View full text Add to dashboard Cite

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Perturbation of Electromagnetic Radiation of Downlink in Orthogonal Components on the GOES 16 Satellite by Planar Antenna Phase Array

Heilmann

Filho

Dartora

et al. 2019

J. Phys.: Conf. Ser.

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The Geostationary Operational Environmental Satellite - GOES 16 has an arrangement of planar antennas for uplink and downlink communications in the L-band range, UHF frequency (1694,3/1694,9 MHz), 16 W transmission power and a planar antenna array gain of 28 dBi, for communication operations and data scanning. The structure of antennas in the form of arrangement combines high directivity in the electromagnetic signal and reduction of the broadside, which corresponds to a smaller angular variation. Assuming a communication channel for the GOES 16, from the phase arrangement of planar antennas using 4 rectangular radiant elements of 30 cm × 30 cm (patch) in the transmission (downlink), we defined an expression for the gain of the array of planar antennas and model an acceleration for the satellite, due to the effect of the electromagnetic perturbation it admits, antenna theory and the energy-momentum conservation laws. For a state vector - 04/02/2019, at 18h 40m 12.44s, we implemented a routine using numerical methods with the equation of movement in the form of Cartesian components, which can be used for both keplerian movement as well as adding the desired disturbing accelerations. We propagate its orbit over a period of 5 days, with a step of 10 minutes, and correlate the results of this propagation in the propagated orbital model without disturbance and with the disturbance of the acceleration on the satellite of electromagnetic origin, centered in the phase arrangement of flat antennas. The perturbative effect of this model is applied on GOES 16 taking into account satellite mass, antenna characteristics, radiated power and maximum antenna gain. The numerical integrator used for the solution of the satellite motion equation is based on the fourth and fifth degree Runge-Kutta method, and the results shows that the phase arrangement of planar antennas with the described configuration implies a significant electromagnetic disturbance, changing the components in the direction (radial, transverse and normal) and the coordinates XYZ.

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