# Load Field Data From an ASCII Text File

When the data is read from an ASCII input file, the data must be given in a specific format.

Note: Each line in the ASCII file represents one point and the values are space
delimited.

## Planar Apertures

For planar apertures each line (point definition) must contain the following four
parameters:

- absolute value of the field component in the ${\widehat{u}}_{2}$ direction
- phase of the field component in the ${\widehat{u}}_{2}$ direction
- absolute value of the field component in the ${\widehat{u}}_{3}$ direction
- phase of the field component in the ${\widehat{u}}_{3}$ direction

## Cylindrical Apertures

For cylindrical apertures each line (point definition) must contain the following
five parameters:

- angle $\phi $ in degrees
- absolute value of the $\widehat{\phi}$ component
- phase of the $\widehat{\phi}$ component
- absolute value of the $\widehat{z}$ component
- phase of the $\widehat{z}$ component.

## Spherical Apertures

For spherical apertures it must contain the following six parameters:

- $\vartheta $ angle
- $\phi $ angle
- absolute value of the $\widehat{\vartheta}$ component
- phase of the $\widehat{\vartheta}$ component
- absolute value of the $\widehat{\phi}$ component
- phase of the $\widehat{\phi}$ component.