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cinania su celkom ftipni ked chcu China has ordered 18-20 rubidium atomic clocks, a key component of satellite navigation systems. ... The International Telecommunications Union (ITU) database has 36 satellite slots registered to Compass. ... What is Europe to do? The economic returns on Galileo must be protected if the project is to succeed. China could be given rights under the Supervisory Authority, minimizing its need for Compass. However, this would probably allow Chinese companies to build Galileo ground receivers, a potentially lucrative market that Europe would like to keep for itself. It would also give China access to the encrypted, and sensitive, public-safety signals. The stakes are high, but can Europe afford to call China’s bluff? http://www.defensetech.org/archives/002635.html ...virtually all GPS and Galileo frequencies are overlain by Compass. Not only that, but Compass retains additional frequencies that are not touched by either of the U.S. or European systems (a caveat: satellites rarely use all the frequencies included in their ITU registrations, so this needs to be taken with a grain of salt). GPS’s civilian and military channels, Galileo’s open, commercial, and Public Regulated channels are all within those ranges. Only the frequencies used onboard GPS satellites for missile warnings were avoided – at least China was wise enough not to mess with that. Compass could jam GPS or Galileo even if Compass is only a regional system for Asia with a limited number of satellites. In a military flare-up regarding Taiwan, China could certainly benefit from a complete denial of positioning services to the U.S. and its allies. http://www.defensetech.org/archives/002643.html |
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