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Technology@lemmy.zipEnglish · 11 天前

How The U.S. Will Track EVERY Vehicle from Space: SAR GMTI/AMTI

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How The U.S. Will Track EVERY Vehicle from Space: SAR GMTI/AMTI

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Samskara@sh.itjust.works to

Technology@lemmy.zipEnglish · 11 天前

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Samskara@sh.itjust.worksOP
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11 天前
GPS is a passive system. Your phone is only a receiver and sends nothing to the satellite.
- RecursiveParadox@piefed.social
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  But AIS and MMSI do broadcast to the birds.

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