A system includes an antenna of a ground station. The antenna is configured to generate a plurality of signal beams. The plurality of signal beams defines a plurality of cells in the sky. The antenna is mechanically fixed to a particular orientation. The antenna includes a phased array antenna. The system also includes a processor coupled to the antenna. The processor is configured to initiate concurrent communications with a plurality of spacecraft via the plurality of signal beams. The plurality of spacecraft is located within the plurality of cells.