WSF_EXISTING_PLATFORM_GRID

grid WSF_EXISTING_PLATFORM_GRID
grid <name> WSF_EXISTING_PLATFORM_GRID
   ... Common Grid Commands ...
   platform ...
end_grid

Overview

The WSF_EXISTING_PLATFORM_GRID is a coverage grid formed from a number of user-specified platforms. This will not modify the specified platforms in any way. These platforms are not required to be stationary and are not required to form some pattern in their locations.

Common Grid Commands

grid_data_file <file-name>

Specify the name of an output file that will be created containing details of the points in this grid. The specified file is created at the end of the simulation.

central_body … end_central_body
central_body <central-body-type>
   polar_offset_angles
end_central_body

Specify the central body and related ellipsoid model to be used by simulation platforms. Options for <central body type> are the following:

  • earth_wgs72 (Earth World Geodetic System 1972): The central body ellipsoid is defined according to the WGS-72 standard.

  • earth_wgs84 (Earth World Geodetic System 1984): The central body ellipsoid is defined according to the WGS-84 standard.

  • earth_egm96 (Earth Gravity Model 1996): The central body ellipsoid is defined according to the EGM-96 standard.

  • moon: The central body ellipsoid is defined according to published lunar parameters.

  • sun: The central body ellipsoid is defined according to published solar parameters.

  • jupiter: The central body ellipsoid is defined according to published Jovian parameters.

Default earth_wgs84

polar_offset_angles <angle-value> <angle-value>

Specify the central_body’s polar offset angles (x_p and y_p, respectively) of the Celestial Intermediate Pole (CIP) with respect to the WCS (ITRS) coordinate system. Providing these values (of the order of tenths of arc-seconds) enables very highly accurate conversions between ECI and WCS coordinates.

Default 0.0 rad 0.0 rad

Note

WCS->LLA conversions are affected by central body choice, as well as sidereal motion transforms calculated in inertial (ECI) coordinate conversions.

suppress_grid_platforms <boolean-value>

This command allows for the suppression of grid asset platforms in DIS output and in distributed simulations. This suppression only applies for platforms created by a grid. This suppression is enabled by default.

Commands

platform <platform-name> <device-name>

Specify that the platform with the given <platform-name> should be added the grid and use device with the given <device-name> for the coverage computation. This command can be used for as many platforms as desired.