A timescale specifier (UTC or LST).

Input Format:

One of the following keywords:

• utc - Universal Coordinated Time.
• lst - Local Sidereal Time.

Examples:

The first of the following lines halts script execution until the Universal Coordinated Time is 03:34 (am). The second halts execution until the Local Sidereal Time reaches 03:34.

 until $after(03:34, UTC)

 until $after(03:34, LST)