We wish to encourage observers to use this facility and will entertain suggestions to make these catalogs easier to install and use. The telescope operator can enter coordinates at the keyboard. These coordinates may then be used immediately for pointing the telescope or they may be entered into the Scratch catalog for later retrieval. The Scratch catalog has room for up to 100 positions. While this method allows input of new coordinates at any time, it may slow observing if done when the coordinates are actually needed.
Transcription errors are also possible.
The coordinates may then be entered into the Scratch catalog. The TCS can calculate the position for the object at an arbitrary time within the 24-hour window. This is done by a simple linear interpolation. The position may be used immediately for observations, or it may be saved in the Scratch catalog for later use. Each record consists of a series of whitespace-delimited fields.