This file is produced by EMOD3D and contains a timeseries of ground motions on the XY plane. Unlike the LF seis files, this contains data at all grid points and may have a decimated resolution specified when running EMOD3D through the e3d.par file with the parameters dxts and dyts.
Numbers are 4 bytes in length and may be little or big endian.
File size can be derived knowing the format and the shape of time-series (all necessary values are at the beginning of the file).
The gridpoints are based on a model which is an area with equidistant gridpoints in the X, Y, and Z directions. It is centred on a position (longitude, latitude) and may be rotated.
- simulation metadata
- INTEGERS
- number of first x gridpoint
- number of first y gridpoint
- number of first z gridpoint
- number of first timestep
- number of x gridpoints
- number of y gridpoints
- number of z gridpoins (always 1 by definition of X-Y file)
- number of timesteps
- FLOATS
- x spacing between given gridpoints (km)
- y spacing between given gridpoints (km)
- original (pre-decimated) grid spacing between gridpoints used in simulation (km)
- timestep in timeseries (s)
- model rotation of gridpoints (degrees)
- model centre latitude (degrees)
- model centre longitude (degrees)
- INTEGERS
- timeseries
- float array of velocities in the dimentions of timesteps, components (x, y, z), y grid positions, x grid positions.