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How Your Phone Knows Where You Are: The Hidden Satellites, Clocks, and Signals That Put a Blue Dot on Your Map - Tapa blanda
Sinopsis
You glance at your phone, and a small blue dot knows exactly where you are standing—within a few steps, almost anywhere on Earth. It feels like magic, but it is one of the great engineering achievements of our age: a silent conversation between your pocket and a fleet of atomic clocks orbiting 20,000 kilometers overhead. How does a handful of faint signals from space turn into a pin on a map?
In this clear, vivid book, Edward Callenford traces the whole chain that answers the question ‘where am I?’ He explains why every GPS satellite carries an atomic clock, how your phone measures distance by timing radio signals to the billionth of a second, why it takes four satellites and not three to fix your position, and how Einstein’s relativity must be corrected for the system to work at all. From the errors introduced by the ionosphere and by signals bouncing off skyscrapers, to the Wi-Fi networks and cell towers that rescue the blue dot indoors, every idea is grounded in the real technology you use every day.
Featuring original diagrams that make trilateration, timing, and satellite geometry easy to grasp, this is a book for travelers, curious commuters, and anyone who has ever wondered how a machine in their hand can pinpoint them on the surface of a spinning planet. You will never look at that little blue dot the same way again.
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How Your Phone Knows Where You Are
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How Your Phone Knows Where You Are (Paperback)
Impresión bajo demandaLibrería: Grand Eagle Retail, Bensenville, IL, Estados Unidos de America
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Paperback. Condición: new. Paperback. You glance at your phone, and a small blue dot knows exactly where you are standing-within a few steps, almost anywhere on Earth. It feels like magic, but it is one of the great engineering achievements of our age: a silent conversation between your pocket and a fleet of atomic clocks orbiting 20,000 kilometers overhead. How does a handful of faint signals from space turn into a pin on a map?In this clear, vivid book, Edward Callenford traces the whole chain that answers the question 'where am I?' He explains why every GPS satellite carries an atomic clock, how your phone measures distance by timing radio signals to the billionth of a second, why it takes four satellites and not three to fix your position, and how Einstein's relativity must be corrected for the system to work at all. From the errors introduced by the ionosphere and by signals bouncing off skyscrapers, to the Wi-Fi networks and cell towers that rescue the blue dot indoors, every idea is grounded in the real technology you use every day.Featuring original diagrams that make trilateration, timing, and satellite geometry easy to grasp, this is a book for travelers, curious commuters, and anyone who has ever wondered how a machine in their hand can pinpoint them on the surface of a spinning planet. You will never look at that little blue dot the same way again. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability. Nº de ref. del artículo: 9798188692414
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How Your Phone Knows Where You Are: The Hidden Satellites, Clocks, and Signals That Put a Blue Dot on Your Map
Impresión bajo demandaLibrería: California Books, Miami, FL, Estados Unidos de America
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How Your Phone Knows Where You Are
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PAP. Condición: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000. Nº de ref. del artículo: L0-9798188692414
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How Your Phone Knows Where You Are : The Hidden Satellites, Clocks, and Signals That Put a Blue Dot on Your Map
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Amazon Digital Services LLC - Kdp Jul 2026, 2026
ISBN 13: 9798188692414
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Librería: AHA-BUCH GmbH, Einbeck, Alemania
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Taschenbuch. Condición: Neu. Neuware - You glance at your phone, and a small blue dot knows exactly where you are standing-within a few steps, almost anywhere on Earth. It feels like magic, but it is one of the great engineering achievements of our age: a silent conversation between your pocket and a fleet of atomic clocks orbiting 20,000 kilometers overhead. How does a handful of faint signals from space turn into a pin on a map In this clear, vivid book, Edward Callenford traces the whole chain that answers the question 'where am I ' He explains why every GPS satellite carries an atomic clock, how your phone measures distance by timing radio signals to the billionth of a second, why it takes four satellites and not three to fix your position, and how Einstein's relativity must be corrected for the system to work at all. From the errors introduced by the ionosphere and by signals bouncing off skyscrapers, to the Wi-Fi networks and cell towers that rescue the blue dot indoors, every idea is grounded in the real technology you use every day.Featuring original diagrams that make trilateration, timing, and satellite geometry easy to grasp, this is a book for travelers, curious commuters, and anyone who has ever wondered how a machine in their hand can pinpoint them on the surface of a spinning planet. You will never look at that little blue dot the same way again. Nº de ref. del artículo: 9798188692414
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How Your Phone Knows Where You Are (Paperback)
Impresión bajo demandaLibrería: CitiRetail, Stevenage, Reino Unido
Calificación del vendedor: 5 de 5 estrellas
Paperback. Condición: new. Paperback. You glance at your phone, and a small blue dot knows exactly where you are standing-within a few steps, almost anywhere on Earth. It feels like magic, but it is one of the great engineering achievements of our age: a silent conversation between your pocket and a fleet of atomic clocks orbiting 20,000 kilometers overhead. How does a handful of faint signals from space turn into a pin on a map?In this clear, vivid book, Edward Callenford traces the whole chain that answers the question 'where am I?' He explains why every GPS satellite carries an atomic clock, how your phone measures distance by timing radio signals to the billionth of a second, why it takes four satellites and not three to fix your position, and how Einstein's relativity must be corrected for the system to work at all. From the errors introduced by the ionosphere and by signals bouncing off skyscrapers, to the Wi-Fi networks and cell towers that rescue the blue dot indoors, every idea is grounded in the real technology you use every day.Featuring original diagrams that make trilateration, timing, and satellite geometry easy to grasp, this is a book for travelers, curious commuters, and anyone who has ever wondered how a machine in their hand can pinpoint them on the surface of a spinning planet. You will never look at that little blue dot the same way again. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability. Nº de ref. del artículo: 9798188692414
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