One reason for routinely launching GPS satellites is simply "constellation replenishment," said Col. Andrew Menschner, deputy commander of the Space Force's Space Systems Command. Old satellites degrade and die, and new ones need to go up and replace them. At least 24 GPS satellites are needed for global coverage, and having additional satellites in the fleet can improve navigation precision. Today, there are 31 GPS satellites in operational service, flying more than 12,000 miles (20,000 kilometers) above the Earth.
Что думаешь? Оцени!
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How to watch: The first episode of CIA is now streaming on Paramount+. New episodes premiere Mondays at 10 p.m. ET and stream the next day on Paramount+.
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「我剛到這裡時，和人同房很難適應，天氣也相當惡劣。前一個月我都在想：『或許這不是適合我的工作。』」他坦言。