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  2. Geopotential spherical harmonic model - Wikipedia

    en.wikipedia.org/wiki/Geopotential_spherical...

    As P 0 n (x) = −P 0 n (−x) non-zero coefficients J n for odd n correspond to a lack of symmetry "north–south" relative the equatorial plane for the mass distribution of Earth. Non-zero coefficients C n m, S n m correspond to a lack of rotational symmetry around the polar axis for the mass distribution of Earth, i.e. to a "tri-axiality" of ...

  3. Google Earth - Wikipedia

    en.wikipedia.org/wiki/Google_Earth

    Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.

  4. Error analysis for the Global Positioning System - Wikipedia

    en.wikipedia.org/wiki/Error_analysis_for_the...

    That is the satellites' clocks are slower than Earth's clocks by 7214 nanoseconds a day due to their velocity. Note that this speed of 3874 m/s is measured relative to Earth's center rather than its surface where the GPS receivers (and users) are. This is because Earth's equipotential makes net time dilation equal across its geodesic surface. [18]

  5. Dynamic amplification factor - Wikipedia

    en.wikipedia.org/wiki/Dynamic_amplification_factor

    Dynamic Amplification Factor (DAF) or Dynamic Increase Factor (DIF), is a dimensionless number which describes how many times the deflections or stresses should be multiplied to the deflections or stresses caused by the static loads when a dynamic load is applied on to a structure.

  6. Impact Field Studies Group - Wikipedia

    en.wikipedia.org/wiki/Impact_Field_Studies_Group

    The submitter should download the Impact Database or KML (Google Earth) version of it to verify that the site has not already been included, and possibly rejected. If the submitter is not familiar with the science behind recognition of impact craters, they must read Traces of Catastrophe .

  7. Earth mover's distance - Wikipedia

    en.wikipedia.org/wiki/Earth_mover's_distance

    C++ and Matlab and Java wrappers code for the Earth Mover's Distance, especially efficient for thresholded ground distances; Java implementation of a generic generator for evaluating large-scale Earth Mover's Distance based similarity analysis; Demonstration of Minkowski additivity, convex monotonicity, and other properties of the Earth Movers ...

  8. Dynamic height - Wikipedia

    en.wikipedia.org/wiki/Dynamic_height

    Dynamic height is a way of specifying the vertical position of a point above a vertical datum; it is an alternative for orthometric height or normal height. It can be computed by dividing the location's geopotential number by the normal gravity at 45 degree latitude and zero height, a constant value (9.806199203 m/s 2 ). [ 1 ]

  9. Earth System Dynamics - Wikipedia

    en.wikipedia.org/wiki/Earth_System_Dynamics

    Earth System Dynamics is a peer-reviewed [1] open access scientific journal [2] published by Copernicus Publications on behalf of the European Geosciences Union. [3] The journal publishes articles describing original research on the geology, climate change, and atmospheric science.