Return the current azimuth of a given source.

Arguments:

Source source

The source of interest.

Example 1:

The following example displays the azimuth of mars.

  print $azimuth(mars)

An example of the resulting output would be:

  LOG: 326:05:11.7270

Example 2:

The following example halts script execution until Mars is in the western hemisphere.

 until $azimuth(mars) > 180

Context:

The returned azimuths have been corrected for precession and nutation, but not for atmospheric refraction or tilts in the telescope axes.