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une constellation orbitale de satellites qui apparaît virtuellement géosynchrone.
fixed satellite constellation system that employs non-geostationary satellites in sub-geosynchronous eilliptical orbits with common ground tracks. in elliptical orbits, the satellites emulate geosynchronous satellites when they are near the apogee of the elliptical orbits. the satellites will only be active during this portion of the orbit near the apogee and the remainder of the orbit shut down most functions to conserve electrical energy.
iii) observation de petits objets en orbite géosynchrone et détermination des caractéristiques orbitales;
(iii) observation of smaller objects in geosynchronous earth orbit (geo), and determination of orbital characteristics;