Russian “Rassvet” satellites, developed by the aerospace company Bureau 1440, are currently providing at least two daily “communication windows” over Ukraine, each lasting more than an hour. Satellite communications expert Volodymyr Stepanets told Militarnyi that, as of July 31, 2026, the first operational batch of Bureau 1440 satellites, launched in late March, has largely completed its deployment into an operational formation.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. Twelve of the 16 launched satellites have reached their operational altitude of 550 kilometers, three are gradually ascending, and one burned up, likely due to a manufacturing defect. “We see that a chain with good coverage has effectively already been formed, which provides this good coverage approximately twice a day,” Stepanets said. “In reality, there are more of these flyovers; meaning several such chains can pass with coverage of certain regions at intervals of approximately once every hour and a half. But what is important is that these satellites are already providing fairly dense coverage.” According to the N2YO tracking service, the Russian satellites are in orbits that allow them to pass over Ukraine four times a day. However, during only two or three of these passes do the satellites rise high enough above the horizon to ensure a stable connection with ground terminals. During each pass, which lasts about an hour to an hour and a half for the full formation, a “communication window” is created.