# Element Power Loss (.EPL)

The data structure for the .epl files are described to understand and correctly post-process these files externally.

The following fields are available in the header block:

Table 1. Fields in the header block of the .epl file.
Key Required Description
File Type Yes Describes the type of the file. For a transmitted and reflected wave, the value must be Power Loss.
File Format Yes Denotes the file syntax version (such as “5”). If not present it defaults to version 1 (files pre-dating Feko 6.1).
Source Optional Denotes the base filename of the source where this data comes from.
Date Optional Date and time of data export in format “YYYY-MM-DD-hh:mm:ss” (that is 24-hour format).

The following fields are available in the solution block header:

Table 2. Available fields in the Solution Block Header of the .epl file.
Key Required Description
Configuration Name Optional The configuration name, if present.
Frequency Yes Frequency in Hz for which the following data was measured/computed.
No. of Element Loss Samples Yes The number of element loss samples.
Element Type Yes Specify the mesh element type when exporting elemental power loss:
• Segment
• Triangle
• Tetrahedron
• Unidentified
No. of Header Lines: 1 Optional Number of header lines to read. The column header lines must follow this line. If this value is not specified, assume a value of “1”.
Yes For header lines, the following format should be used:
#No. of Header Lines: 1
#"Column 1: Line 1" "Column 2: Line 1" ... "Column 7: Line 1"
#"Column 1: Line 2" "Column 2: Line 2" ... "Column 7: Line 2"
...
#"Column 1: Line M" "Column 2: Line M" ... "Column 7: Line M"
The column headers for element power loss (.epl) file:
Num  X  Y  Z  Loss Power  Size  Label