Wolfram Language & System 10.4 (2016)|Legacy Documentation
returns the gravitational field data for the current location.
returns the gravitational field data for a location.
returns the component of the gravitational field.
- GeogravityModelData makes use of $GeoLocation to determine your location.
- locationspec can be specified as latitude and longitude coordinates , coordinates with a height , GeoPosition[…], or as a named Entity[…]. h can be input as a numeric object in meters or as a Quantity.
- locationspec can also be a region as specified by a named Entity[…] or a listed pair of specific locations or .
- Location can also be specified as Association["Location"->locationspec].
- For regions, results are returned as arrays or an Association of arrays of gravitational fields by default. Arrays are calculated at the geographic height of a specific coordinate point of the grid above the reference datum unless otherwise specified. If that data is not available, it uses a default height of 0 meters.
- Components include , , , , , , and . Components are measured relative to the reference ellipsoid .
- is measured relative to the perpendicular to the reference ellipsoid where positive values are downward. is the field parallel to the surface at that point. is the angle between the north and east components. is the angle between the horizontal component and the vertical component. is the total magnitude of the field. is the gravitational potential.
- Components and are returned in meters per second squared. and are returned in angular degrees. is returned in joules per kilogram.
- All gravitational field components are returned as an Association unless a specific component is requested.
- GeogravityModelData[locationspec,component,func] is used to specify the format of output when extended locations are specified.
- Possible settings for func include:
All return all values for extended locations Interval return intervals for extended locations Max return maximum values for extended locations Mean return mean value for extended locations Min return minumum values for extended locations StandardDeviation return standard deviation for extended locations
- GeogravityModelData takes the following options:
Method Automatic specific components to include in the calculation GeoZoomLevel Automatic level of detail for gravitational field arrays
- Method takes a suboption that controls the order of the gravitational model used. It can be set to integer values between 2 and 360 inclusive.
- Method also takes a suboption that can be set to True to include the effects of the Earth's rotation in the calculation of the acceleration field components.
- The spatial resolution of the requested gravitational field data can be selected with GeoZoomLevel, where GeoZoomLevel is a positive integer.
- Data is based on EGM96 (Earth Gravitational Model 1996) on the WGS 84 ellipsoid.