Volumetric SAR File Format | XFdtd

Learn about binary file format.

XFsolver writes multiple output files of volumetric SAR data per steady-state frequency. Each file includes the SAR value—either raw or averaged—for any Yee cell where SAR was computed in a single planar slice of the mesh. The file is then written to the appropriate steady-state frequency directory.

The files utilize the following naming systems:

The [SliceDirection] in the above file names indicates the planar direction of the associated mesh slice with either xy, yz, or xz. The [SliceIndex] indicates the magnetic calculation grid index of that planar slice. For instance, SAR_Raw_Sensor.xy_5.sar.bin contains raw SAR data for the Yee cells with magnetic calculation grid index k = 5.

The [ModifiedSensorName] is the sensor's name as it appears in the XF project, with a [_] symbol replacing all characters other than letters and numbers. SAR averaging sensors are typically named SAR_Averaging_Sensor, although a different name may be assigned during SAR post-processing. The [uniqueNumber] is an XF-generated integer.

Users can read each planar slice SAR data file—either raw or averaged—as follows:

Only version numbers 0 and 1 are defined. All SAR values reported in the file are contained in a single planar slice of Yee cells. Grid index i, j, or k is constant for the file.

Users can read the remaining file data as follows:

Users should note that the SAR records are not in any predefined order. Additionally, some Yee cells within the plane have no corresponding value for SAR, such as cells in freespace or cells that touch a perfect conductor edge, and are therefore omitted.