Results 11 to 20 of about 91,187 (349)

Analytical propagation on relative motion of geostationary earth orbit satellites with orbital perturbations

open access: yesIET Control Theory & Applications, 2023
An accurate description of the relative motion of satellites is critical for space missions in the complex geostationary earth orbit space environment. Here, a new relative motion model is established considering major perturbations.
Dali Zhang   +4 more
doaj   +1 more source

Self-organising satellite constellation in geostationary Earth orbit [PDF]

open access: yes, 2015
This paper presents a novel solution to the problem of autonomous task allocation for a self-organizing satellite constellation in Earth orbit. The method allows satellites to cluster themselves above targets on the Earth’s surface.
Colombo, Camilla   +3 more
core   +1 more source

Multi-function array SAR system on a spaceborne dual platform

open access: yesThe Journal of Engineering, 2019
This study proposes a sparse linear array synthetic aperture radar (LASAR) on a spaceborne dual platform. The transmitting elements are placed at the LASAR tips that form a satellite's dual platform, and the receiving elements are placed on the large ...
Dehua He   +4 more
doaj   +1 more source

THE METHOD FOR FAST DETERMINATION OF GEOSTATIONARY ARTH SATELLITE ORBIT FROM ANGULAR COORDINATES MEASUREMENTS

open access: yesOdessa Astronomical Publications, 2017
Classical Laplas method for determination of Keplerian orbital elements is described. The values obtained are improved by the method of differential corrections.
O. A. Bazyey   +2 more
doaj   +1 more source

Everynight Accounting: Nighttime Lights as a Proxy for Economic Performance of Regions

open access: yesRemote Sensing, 2022
Artificial nighttime lights, emitted from residential, industrial, commercial and entertainment areas, and captured by satellites, have proven to be a reliable proxy for on-ground human activities [...]
Nataliya Rybnikova
doaj   +1 more source

Clutter simulation and characterisation of space-borne GEO-LEO radar

open access: yesThe Journal of Engineering, 2019
Compared with ground radars, space-borne bistatic radar shows great advantages in higher signal-to-noise ratio (SNR) and robuster security. Firstly, this study establishes space-borne geosynchronous satellite-low orbiting satellite (GEO-LEO) space–time ...
Huihui Ding   +3 more
doaj   +1 more source

Effects Of Direct And Indirect Solar Radiation Pressure In Orbital Parameters Of GPS Satelittes

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this paper we determined the variation of the Keplerian orbital elements of a GPS satellite due to the direct and indirect action of solar radiation pressure. For this study, we created a soft program to determine the Keplerian elements.
Lupu Sergiu, Zaharescu Eugen
doaj   +1 more source

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