STIS Instrument Handbook for Cycle 24 . ... Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 24 > Chapter 1: Introduction > 1.5 The Help Desk at STScI . ... STScI has a Help Desk whose staff quickly provide answers on any HST-related topic, including questions regarding STIS and the proposal process. If you have many questions about the implementation of your program, you may send a request to the Help Desk asking for a Contact Scientist (CS) to be assigned to your program. ...