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Specifies the direction along which the averaging of the variable is performed. Options are North South and East West. For North South, the averaging is weighted by cos(latitude).
Top Level
Anchor Date Min Date Min
Date Min
| Date Min | |
| Date Min |
Specifies the horizontal date minimum value. Default value AUTOMATIC indicates that the minimum value will be taken from the input data.
Date Max
Specifies the horizontal date maximum value. Default value AUTOMATIC indicates that the maximum value will be taken from the input data.
Bottom Level (Vertical Hovm)
Specifies the vertical lower limit valueSpecifies the upper limit of the average cross section, as a pressure level (hPa) or model level (η levels).
Top Level (Vertical
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Hovm)
Specifies the type of vertical axis - Linear or Logarithmic.
Interpolate Values
Specifies whether to interpolate vertically the cross-section values into a regular set of interpolated vertical levels. Choosing not to interpolate returns a cross section data matrix with values at the original levels.
Note - if you need to use the cross section data in calculations further down the stream you should not interpolate.
Area
Specifies the coordinates of the area over which the average profile is calculated. Enter coordinates (lat/long) of an area separated by a "/" (top left lat and long, bottom right lat and long). Alternatively, use the coordinate assist button.
Direction
Specifies the direction along which the averaging of the variable is performed. Options are North South and East West. For North South, the averaging is weighted by cos(latitude).
Horizontal Axis
Specifies the plotting attributes of the horizontal axis. An Axis Plotting icon can be dropped here.
Vertical Axis
Specifies the plotting attributes of the vertical axis. An Axis Plotting icon can be dropped here.
vertical upper limit value, as a pressure level (hPa) or model level (η levels).
Swap Axes
By default, the definition of the vertical and horizontal axes of the Hovmøller diagrams follows pre-defined rules. However, if Swap Axes is set to Yes then the axes will be swapped around.
Resolution
Used to interpolate the data onto a regular grid, and applies to both the horizontal and vertical axes where appropriate. This parameter is essential for creating a Hovmøller diagram from satellite data.
Time Axis
Specifies the characteristics of the time-series axis to be used in the plotting of the data. An Axis Plotting icon can be dropped here. The following Axis parameters are defined by the application; therefore, users cannot change their values directly: Axis Type (set to Date), Axis Date Min Value and Axis Date Max Value (set according to parameters Date Min), and Axis Orientation.
The Axis Orientation parameter is defined according to the following rules:
a) if the selected input pane is Line Hov, the value is set to Horizontal;
b) if the selected input pane is Area Hov and the Average Direction is East West, the value is set to Horizontal
c) if the selected input pane is Area Hov and the Average Direction is North South, the value is set to Vertical.
d) if the selected input pane is Height Hov, the value is set to Horizontal.
However, it is possible to change the Axis Orientation value from its calculated default by setting parameter Swap Axes to Yes; this option is not available for Height Hov.
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