Name: how gps satellites find your location
Uploaded: 2025-03-26T15:38:32.000Z
Duration: 1 min 30 s
Channel: JoVE

K12 Standards

ohios-learning-standards-and-model-curriculum

Ohio’s Learning Standards and Model Curriculum

9-12

Physical Geology

Plate Tectonics

Plate motion

introduction-to-global-positioning-system

Introduction to Global Positioning System

أحدث نظام تحديد المواقع العالمي (GPS) ثورة في الملاحة من خلال توفير مواقع دقيقة من خلال إشارات الأقمار الصناعية. تم تطويره في البداية من قبل وزارة الدفاع الأمريكية في السبعينيات للاستخدام العسكري، وأصبح متاحا للتطبيقات المدنية في الثمانينيات، حيث يقدم خدمة عالمية مجانية وموثوقة.<p style="margin-left:.5in;text-align:justify;">GPS يعمل من خلال ثلاثة مكونات. يتكون الجزء الفضائي من كوكبة من 24 ساتلا تشغيليا والعديد من النسخ الاحتياطية ، تدور حول الأرض على ارتفاع 2000 20 كيلومتر تقريبا. تحافظ هذه الأقمار الصناعية على مسارات دقيقة باستخدام أنظمة متقدمة. يتضمن قطاع التحكم ست محطات مراقبة عالمية تتعقب مواقع الأقمار الصناعية وتنقل التصحيحات لحساب تأثيرات الجاذبية والشمسية. يتضمن مقطع المستخدم أجهزة استقبال تحدد المواقع عن طريق معالجة الإشارات من ثلاثة أقمار صناعية على الأقل.GPS له تطبيقات متنوعة. وهي تدعم الملاحة الآمنة وتوجيه الصواريخ وعمليات الإنقاذ في السياقات العسكرية.  يستفيد المسح من رسم الخرائط الدقيقة للبناء واستخدام الأراضي. بالنسبة للجمهور ، يدعم نظام تحديد المواقع العالمي (GPS) إدارة الأسطول ، والملاحة في المركبات ، والأنشطة الخارجية ، ومزامنة الوقت لصناعات مثل البنوك والاتصالات وشبكات الطاقة. يتكامل نظام تحديد المواقع العالمي الحديث مع GLONASS و Galileo و BeiDou, مما يعزز الدقة والموثوقية العالمية, حتى في البيئات الصعبة.

مقدمة في نظام تحديد المواقع العالمي

أحدث النظام العالمي لتحديد المواقع (GPS) ثورة في تحديد المواقع على الأرض ، حيث قدم بيانات دقيقة عن الموقع من خلال تحديد الأقمار الصناعية. تم تطوير نظام GPS في عام 1978 من قبل وزارة الدفاع  الأمريكية للاستخدام العسكري ، وأصبح متاحا للتطبيقات المدنية في عام 1983 ، مما أدى إلى تحويل المجالات بما في ذلك الملاحة وإدارة الأسطول ومزامنة الوقت لأنظمة الاتصالات. يتكون نظام تحديد المواقع العالمي (GPS) من أقمار صناعية في مدار أرضي متوسط ، على ارتفاع حوالي 20,200 كيلومتر فوق السطح ، ويكمل مدارا كل 11 ساعة و 58 دقيقة. وتكفل كوكبة مكونة من 24 ساتلا تعمل بكامل طاقتها، أنشئت في عام 1994، تغطية عالمية. يشمل الدعم الأرضي محطات المراقبة التي تتعقب وتضبط مواقع الأقمار الصناعية للحفاظ على الدقة ضد تأثيرات الجاذبية والشمس. كجزء من نظام الملاحة العالمي عبر الأقمار الصناعية (GNSS) ، يتكامل نظام تحديد المواقع العالمي مع أنظمة مثل GLONASS الروسية ، و Galileo الأوروبية ، و BeiDou الصينية. يعمل هذا التعاون على تحسين التغطية وتوفير التكرار وتحسين الدقة في البيئات الصعبة. تم تصميم نظام تحديد المواقع العالمي (GPS) في البداية للتطبيقات العسكرية ، ويدعم الملاحة الآمنة للطائرات والسفن والمركبات البرية وتوجيه الصواريخ وعمليات البحث والإنقاذ. إنه يتيح المسح الفعال للأراضي والبناء ، مما يلغي قيود خط الرؤية ويقلل من وقت المسح. يمكن الآن إكمال المهام التي كانت تستغرق أسابيع في يوم واحد. تشمل التطبيقات العامة لنظام تحديد المواقع العالمي (GPS) الملاحة وإدارة الأسطول والترفيه والخدمات الهامة مثل مزامنة الوقت للخدمات المصرفية والاتصالات. يعتمد تحديد المواقع GPS على تحديد المواقع عبر الأقمار الصناعية ، وقياس الوقت الذي تنتقل فيه إشارات الراديو من قمر صناعي إلى جهاز استقبال. يتم حساب المسافات باستخدام التأخير الزمني للإشارات التي تنتقل بسرعة الضوء. تحدد ثلاثة أقمار صناعية على الأقل موقعا ، مع رابع لتصحيح أخطاء التوقيت. تضمن الساعات الذرية ، التي تصل إلى جزء من المليار من الثانية ، أن نظام GPS يوفر موقعا موثوقا وفعالا من حيث التكلفة للتطبيقات العالمية المتنوعة.

The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was ...

Education

JoVE Core

Civil Engineering

الهندسة المدنية

Unit 1

الوحدة الأولى

Global Positioning System (GPS)

نظام تحديد المواقع العالمي (GPS)

KEY TERMS AND CONCEPTS

المصطلحات والمفاهيم الرئيسية

how gps satellites find your location

The Global Positioning System, or GPS, finds a location on Earth by using satellites and radio signal timing. It changed how people navigate and how many industries work. GPS was developed in 1978 by the U.S. Department of Defense for military use. It became available for civilian use in 1983.

GPS satellites orbit in medium Earth orbit about 20,200 kilometers above Earth. Each satellite takes about 11 hours and 58 minutes to complete one orbit. A full GPS constellation has 24 satellites, which was established in 1994. Ground monitoring stations track these satellites and adjust their positions to keep the system accurate. They help correct for changes caused by gravitational and solar influences.

GPS is part of the Global Navigation Satellite System, or GNSS. It works alongside Russia’s GLONASS, Europe’s Galileo, and China’s BeiDou. This cooperation improves coverage, adds backup, and increases accuracy in difficult places. GPS supports aircraft, ships, land vehicles, missile guidance, and search-and-rescue operations. It is also used for secure navigation in military and civilian settings.

The system is useful in surveying for land and construction. It removes line-of-sight limits and cuts survey time. Work that once took weeks can often be completed in a day. GPS is also used for navigation, fleet management, recreation, and time synchronization in banking and telecommunications.

GPS position finding depends on satellite ranging. This means it measures how long radio signals take to travel from a satellite to a receiver. The distance is calculated from that time delay at the speed of light. At least three satellites are needed to determine a position, and a fourth satellite corrects timing errors. Atomic clocks, accurate to a billionth of a second, help make GPS reliable and cost-effective for many global uses.

How GPS Satellites Find Your Location

introduction to global positioning system

The Global Positioning System, or GPS, finds a location on Earth by using satellites and radio signal timing. It changed how people navigate and how many industries work. GPS was developed in 1978 by the U.S. Department of Defense for military use. It became available for civilian use in 1983. GPS satellites orbit in medium Earth orbit about 20,200 kilometers above Earth. Each satellite takes about 11 hours and 58 minutes to complete one orbit. A full GPS constellation has 24 satellites, which...

errors in global positioning system

GPS Error Sources and Accuracy Limits

GPS accuracy can change because of signal delays, reflections, and device problems. These errors come from the atmosphere, nearby surfaces, satellites, and the receiver itself. To get reliable positioning, GPS systems must reduce these effects as much as possible. As GPS signals pass through the ionosphere and troposphere, they slow down. The ionosphere contains charged particles and is strongly affected by solar activity. The troposphere contains water vapor, which also changes how the signal...

geoid and ellipsoid

Earth Shape and GPS Height Models

Earth shape and GPS height models are explained using the ellipsoid, the geoid, and modern coordinate systems. The Earth is best described as an ellipsoid, which is a slightly flattened sphere formed by rotating an ellipse around its minor axis. This flattening makes the polar axis about 21 kilometers shorter than the equatorial axis. The geoid shows a different side of Earth’s shape. It is the Earth’s gravitational shape and matches mean sea level, or MSL. The geoid is an irregular...

field application of global positioning system

field-application-of-global-positioning-system

GPS Field Mapping for Surveying Sites

Global Positioning System (GPS) helps map field locations for surveying, navigation, and infrastructure work. Satellite signals let a GPS receiver find an object’s position very quickly, often in less than a second. This speed makes GPS a practical tool for fieldwork. Modern GPS receivers are small, light, and energy efficient. They are built for portable use in real field conditions. GPS signals use the microwave spectrum, so they can work in rain and fog. Even so, ionospheric disturbances...

types of global positioning system surveys

types-of-global-positioning-system-surveys

GPS Surveying for Accuracy and Speed

GPS surveying uses different methods to balance accuracy, speed, and field conditions. The main approaches are static GPS, kinematic GPS, and real-time kinematic (RTK) surveying. Each one collects position data in a different way, so each fits a different kind of surveying and mapping job. Static GPS uses two receivers. One stays at a known reference point, and the other is placed at the target point. It measures several satellite ranges over a long time, which can give centimeter-level...

design example: identifying the locations of monuments in the field using global positioning system device

design-example-identifying-locations-monuments-field-using-global

GPS Surveying for Park Monument Coordinates

Global Positioning System (GPS) surveying can be used to find the coordinates and elevations of park monuments. Surveyors use this method to measure precise points on Earth. In this survey, GPS receivers were used to locate two monument markers and record their height above the ground model. The work began with mission planning. Surveyors checked satellite visibility and tried to reduce Position Dilution of Precision, or PDOP, which is a measure of how satellite geometry can affect accuracy. A...

key terms and concepts

Learn how GPS satellites use signal timing, atomic clocks, and satellite ranging to find location on Earth and support navigation, surveying, and more.

How GPS Satellites Find Your Location | JoVE K12

JoVE Core Civil Engineering provides a foundational exploration of essential construction materials in civil engineering, focusing on bricks, stones, steel, wood, and concrete through easy-to-understand animated videos. This collection covers the properties, manufacturing processes, and practical applications of these materials. Additionally, the accompanied science-in-action videos demonstrate the research experiments performed in laboratories.

civil engineering

Glacial Geology

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Determining Spatial Orientation of Rock Layers with the Brunton Compass

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Igneous rocks are the products of cooling and crystallization of magma. Volcanic rocks ...

Making a Geologic Cross Section

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Geologic maps were first made and utilized in Europe, in the mid-to-late 18th century. ...

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Using Topographic Maps to Generate Topographic Profiles

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An Overview of Alkenone Biomarker Analysis for Paleothermometry

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Internal Earth
• Seismic waves
    ◦ S and P waves
    ◦ Velocities, reflection, refraction of waves

Content elaboration: This unit builds upon a variety of topics studied in middle school. In the Earth and Space Science strand, plate tectonics is studied in grade 8. Topics include plate motion (evidence and causes, characteristics of oceanic and continental plates), seismic waves, continental drift, seafloor spreading, the structure of Earth's surface and interior (including specific layers) and paleomagnetism. In the Life Science strand, fossils and depositional environments are included. In the Physical Science strand, density, convection, conductivity, motion, kinetic energy, radiometric dating, seismic waves, thermal energy, pressure and gravity are explored. In this course, Earth's interior and plate tectonics are investigated at greater depth using models, simulations, actual seismic data, real-time data, satellite data and remote sensing. Relationships between energy, tectonic activity levels and earthquake or volcano predictions, and calculations to obtain the magnitude, focus and epicenter of an earthquake are included. Evidence and data analysis are key in understanding this part of the Earth system. For example, GIS/GPS and/or satellite data provide evidence for moving plates and changing landscapes (due to tectonic activity). The causes for plate motion, the evidence of moving plates and the results of plate tectonics must be related to Earth's past, present and future. The use of evidence to support conclusions and predictions pertaining to plate motion is an important part of this unit.

Internal Earth

Electrostatic Boundary Conditions

Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it ...

Gravity between Spherical Bodies

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The Carbon Cycle

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Igneous Intrusive Rock

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The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited ...

Newton's Law of Universal Gravitation

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Newton's Law of Gravitation

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Structure of Earth (Note: specific layers were part of grade 8)
• Asthenosphere
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• Mohorovicic boundary (Moho)
• Composition of each of the layers of Earth
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• Thermal energy (geothermal gradient and heat flow)

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Structure of Earth

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An Overview of bGDGT Biomarker Analysis for Paleoclimatology

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Sonication Extraction of Lipid Biomarkers from Sediment

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Soxhlet Extraction of Lipid Biomarkers from Sediment

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Extraction of Biomarkers from Sediments - Accelerated Solvent Extraction

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The distribution of a group of organic biomarkers called glycerol-dialkyl ...

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Conversion of Fatty Acid Methyl Esters by Saponification for Uk'37 Paleothermometry

Source: Laboratory of Jeff Salacup&#160;- University of Massachusetts Amherst
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Historical review (Note: this would include a review of continental drift and seafloor spreading found in grade 8)
• Paleomagnetism and magnetic anomalies
• Paleoclimatology

Content elaboration: This unit builds upon a variety of topics studied in middle school. In the Earth and Space Science strand, plate tectonics is studied in grade 8. Topics include plate motion (evidence and causes, characteristics of oceanic and continental plates), seismic waves, continental drift, seafloor spreading, the structure of Earth's surface and interior (including specific layers) and paleomagnetism. In the Life Science strand, fossils and depositional environments are included. In the Physical Science strand, density, convection, conductivity, motion, kinetic energy, radiometric dating, seismic waves, thermal energy, pressure and gravity are explored. In this course, Earth's interior and plate tectonics are investigated at greater depth using models, simulations, actual seismic data, real-time data, satellite data and remote sensing. Relationships between energy, tectonic activity levels and earthquake or volcano predictions, and calculations to obtain the magnitude, focus and epicenter of an earthquake are included. Evidence and data analysis are key in understanding this part of the Earth system. For example, GIS/GPS and/or satellite data provide evidence for moving plates and changing landscapes (due to tectonic activity). The causes for plate motion, the evidence of moving plates and the results of plate tectonics must be related to Earth's past, present and future. The use of evidence to support conclusions and predictions pertaining to plate motion is an important part of this unit.

Historical review

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Plate motion (Note: introduced in grade 8)
• Causes and evidence of plate motion
• Measuring plate motion
• Characteristics of oceanic and continental plates
• Relationship of plate movement and geologic events
• Mantle plumes

Content elaboration: This unit builds upon a variety of topics studied in middle school. In the Earth and Space Science strand, plate tectonics is studied in grade 8. Topics include plate motion (evidence and causes, characteristics of oceanic and continental plates), seismic waves, continental drift, seafloor spreading, the structure of Earth's surface and interior (including specific layers) and paleomagnetism. In the Life Science strand, fossils and depositional environments are included. In the Physical Science strand, density, convection, conductivity, motion, kinetic energy, radiometric dating, seismic waves, thermal energy, pressure and gravity are explored. In this course, Earth's interior and plate tectonics are investigated at greater depth using models, simulations, actual seismic data, real-time data, satellite data and remote sensing. Relationships between energy, tectonic activity levels and earthquake or volcano predictions, and calculations to obtain the magnitude, focus and epicenter of an earthquake are included. Evidence and data analysis are key in understanding this part of the Earth system. For example, GIS/GPS and/or satellite data provide evidence for moving plates and changing landscapes (due to tectonic activity). The causes for plate motion, the evidence of moving plates and the results of plate tectonics must be related to Earth's past, present and future. The use of evidence to support conclusions and predictions pertaining to plate motion is an important part of this unit.

How GPS Satellites Find Your Location

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