### Radio-SkyPipe Help

# Apply Equations Set Up

### Pro Version Only

Application of equations to incoming data is a powerful
feature. With it you may scale data in most any fashion. You can even create
channels which are the result of mathematical manipulations of the data in
multiple other channels. For example, you might use the data in Channel 1 to
offset the data Channel 2 and create a third channel that is the product of the
values in Channels 1 and 2. For a good example of equations applied
to convert to degrees Kelvin equivalent antenna temperature see Jim
Brown's example at the NJ3BRO observatory.

The Apply Equations to Channels set up panel is accessed from the Options/
Data Source panel. This is is where you write and set equations to be
applied to the various channels. Click
here for information on how write equations for use with SkyPipe.
Equations were introduced in version 1.2.11 so older versions of SkyPipe will
not have this feature.

A checkbox and equation text box is present for each channel. If the
checkbox to the left of the equation text box is not checked, the equation will
not be applied to the data from that channel. In addition there is a checkbox
that can over-ride these individual checkboxes. It is labeled **Apply to
Server / Stand Alone Incoming Data**. If this box is unchecked then none
the equations will be applied to live data.

Equations are written as a single line in the appropriate equation text box.
You must carefully follow the rules for writing
equations. You can copy an
equation down or up to an adjacent equation text box by right clicking on the
box and selecting **Copy Up ** or **Copy Down**. You may also test
the equation in the box by right clicking and selecting **Test** from the
drop down menu. You cannot test equations with time offset values in this way.

The **OK** button applies any changes you have made in the equation
configuration.

You must press the **Save as Defaults** button to have these settings
re-appear the next time you load Radio-SkyPipe.

The **Load Defaults** button reloads the last set of equations saved in
this way.

**Save File** and **Load File** buttons facilitate saving and loading
of equation sets from files.

Help Index | Radio-Sky
Publishing Home