Глобальная спутниковая система

This animation shows the initial build-out of the Starlink (v1.0) constellation, starting on 2019/11/17 up to 2020/05/21.

The x-axis shows the anomaly past the ascending node, while the y-axis shows the longitude of the ascending node (or more precisely its complement) of each satellite. The data is plotted in the frame of reference of a satellite in operational orbit in order to correct for nodal precession.

The TLE-data was obtained from www.space-track.org and processed in Python. For each time step, the most recent TLE-file of each individual satellite was used. For the time in between (usually 8 hours) the orbits were propagated and smoothed out.

Китайская автоматическая станция «Чанъэ-2» провела съемку мест посадок американских пилотируемых кораблей по программе «Аполлон».