The first satellite of the federal project "Sphere" "Skif-D" was delivered to a given orbit, Roskosmos reports.
"Skif-D" became the first in historydomestic satellite industry by a spacecraft, which was launched into a medium circular orbit at a height of 8,070 km with a polar inclination of 90°. Its choice is due to the following features. First, the ability to serve northern latitudes that are inaccessible to traditional satellites in geostationary orbit, including the regions of the Far North, the Arctic, the Northern Sea Route and cross-polar air routes. Secondly, the need for a small number of satellites for sustainable service of the territory of Russia. Thirdly, the optimal balance between the height of the orbit, the visibility time of spacecraft for the subscriber and the number of satellites needed to serve Russia,” said Ivan Zimin, chief designer of the Skif-D spacecraft.