Representatives of "Bureau 1440", which is creating a high-speed satellite broadband data service, reported on new tests of their satellite constellation. In the West, this system has already been dubbed "the Russian response to Elon Musk's Starlink".
Firstly, the constellation's spacecraft successfully exchanged information with a subscriber terminal on Earth using the 5G NTN protocol. The technical solution that enables this is "Bureau 1440's" own stack, and its own method of optimizing standard 5G protocol signals. Thanks to fine-tuning of the radio frequency equipment, it was possible to overcome the Doppler effect and delays in the communication channel with the satellite, which is moving at a speed of 27,000 km/h at an altitude of 800 km above the Earth's surface.
Secondly, tests of intersatellite laser communication terminals continued. It was possible to transmit data between the system's satellites at a distance of 220 km.
The maximum amount of information transmitted in one session exceeded 450 GB. At the same time, the bit error rate was 2.6*10^-13. This means that during the experiment, we did not receive a single error in the operation of the guidance system and not a single damaged packet during data transmission. In total, since the beginning of testing, 14 intersatellite communication sessions have been conducted at distances from 30 to 220 km, and a total of more than 1.5 TB of data has been transmitted from spacecraft to spacecraft.
According to the satellite builders, they now have to form the elements of the 5G user network and build a laser link between spacecraft at distances of more than 1000 km. This will make it possible to provide global seamless coverage not only in Russia, but also on the entire planet Earth in the future.
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