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This Knowledge Database is a collection of links to websites, videos and papers that support facts like that the earth is a rotating globe, that space and satellites exist, that man landed on the moon and many more.
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WGS84 Earth model, Accuracy and Role in Aviation

⇒ www.youtube.com

#52 | 2/9/2017 | Author: Wolfie6020 | Type: Youtube | Keywords: WGS84, Aviation, GPS, Navigation, WAAS, LPV

The World Geodetic System WGS84 is the Globe Model implemented in GPS and is used not only by Google Earth and other map applications, but is also the model used for flight planing and aircraft navigation. It has cm accuracy worldwide. Using Wide Area Augmentation System WAAS it is used to fly thousands of km, even without visibility to the ground, to find the destination runway to m accurcy everywhere on earth.

I show how GPS and the WGS84 model is used in daily flight planing and navigation.

World Geodetic System 1984 (WGS84)

⇒ World Geodetic System 1984 (WGS84)

The WGS 84 represents the best global geodetic reference system for the Earth available at this time for practical applications of mapping, charting, geopositioning and navigation.

  • WGS 84 COORDINATE SYSTEM: Definition, Realization, Agreement with the ITRF, Mathematical Relationship Between the Conventional Celestial Reference System (CCRS) and the WGS 84 Coordinate System
  • WGS 84 ELLIPSOID: Defining Parameters, Earth’s Gravitational Constant (GM), Angular Velocity of the Earth, Derived Geometric and Physical Constants
  • ELLIPSOIDAL GRAVITY FORMULA, EGM96 GRAVITATIONAL MODELING, EGM96 GEOID

Original Link: https://earth-info.nga.mil/GandG/publications/tr8350.2/wgs84fin.pdf

Rainy Lake Experiment: WGS84 Calculator

⇒ Rainy Lake Experiment: WGS84 Calculator

Calculator for WGS84 based transformations of vectors between ECEF cartesian and geodetic coordinates (lat,long,height). All equations are provided.

Download Geoids, Earth Gravitational Model

⇒ earth-info.nga.mil

This division in the Office of Geomatics at NGA is responsible for collecting, processing, and evaluating gravity data. These data are then used to compute gravimetric quantities such as mean gravity anomalies, Geoid heights, deflections of the vertical, and gravity disturbances. All of these quantities are used in World Geodetic System 1984 (WGS84) support, navigation systems, mapping projects, and different types of surveys.

An Earth Gravitational Model (EGM) is set of geopotential coefficients used in a spherical harmonic expansion to create a global potential surface to coincide with Mean Sea Level (MSL). This surface is called a Geoid and it fluctuates above and below the Reference Ellipsoid surface established by WGS 84.

Earth Gravity Calculator

⇒ Earth Gravity Calculator

#36 | 9/1/2018 | Author: Walter Bislin | Type: Website | Keywords: Calculator, Equations, Gravity, Centrifugal, Reference Ellipsoid, WGS84

This calculator can be used to compute the effective gravitational acceleration, the pure gravitational acceleration and the centrifugal acceleration for any point on the Reference Ellipsoid of the earth for both surface and at altitude according to the model WGS84.

 

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