Single-Star SNAFU at Cassegrain

 

Perform a Single star SNAFU in order to determine a software zeropoint for the Pointing Model (see section for a full description). It is recommended to use a star within 2 degrees from the zenith if afterwards the finder zeropoint has to be determined (using the same star).

The SNAFU at the Cassegrain Focus is done as follows:

1. Move the telescope to the SNAFU star.
2. Wait until the telescope is tracking accurately.
3. Type at User Interface:-

   SNAFU

4. Turn up the gain of the Cassegrain TV until the star is clearly visible and use the handset to place the star at the reference position on the spectrograph slit.
5. Press the ACK button.