Initially, SpaceX leaders were discovered to this idea, but then "Ilon told the executives with whom we talked that all LEO (low Earth orbit) communication networks were bankrupt," Hamfris said. And so SpaceX should focus fully to avoid bankruptcy. "We cannot afford any distracting factors," Musk said (according to Hamfris). However, this did not stop the scientist.
According to the researcher, his team has developed a system in which regular signals that send satellites can become the basis of the navigation system without the participation of SpaceX. The researcher says that SpaceX did not reveal the structure of signals, so he had to "start from scratch, building a small radio telescope to track signals.
" Starlink is based on a technology called orthogonal frequency division of channels (ofdm), which makes it possible to pack the largest number of bits per second in a given bandage. It is interesting that the researchers did not even try to break the encryption of Starlink, but instead focused on the sequences of synchronization. Hamfris said they were able to reveal such sequences, but "were pleasantly surprised, finding that the satellites had much more synchronization sequences than needed.
" SpaceX satellites constantly send signals to each other, catching these signals and determining the sequence, the land receiver can determine which satellite the signals were sent from, and then calculate the distance to this satellite. Repeating this process for several satellites, the receiver can determine its location up to 30 m, according to the material.
Hamfris believes that its development on the basis of Starlink can help the army of Ukraine, given the moment that the Armed Forces of the Russian Federation are constantly trying to disable the satellites, which are so necessary for both the Armed Forces and the entire country in these difficult times. "Ukraine's dependence on Starlink is extremely high. Ukraine and its allies in the West are beginning to be aware that they control Starlink and little about it.
All rights reserved IN-Ukraine.info - 2022