Building Sequence Database Files for the
Hopkins Ultraviolet Telescope
Target Procedures (which for historical reasons are sometimes called
ALTs; here we will call them TPs) are special instructions needed to
modify the normal set up or observing procedure.
TPs are needed for handling contingencies
that might occur (e.g. a cataclysmic variable star that may be found
in its high state,), for instrument safety (e.g. door states or
changes), or calibration activities. Also, if predicted count rates
are close to the maximum allowed for a given SP mode, TPs are
available to instruct the operators to change the SP to the proper
mode, based on the measured count rate. Likewise, acquisition
procedures might have to be changed on selected targets for a variety
of reasons. Because of the numerous potential reasons for needing TPs,
we will not go into detail here. The reader is instead referred to
Appendix C for a listing of the current TPs available, including
descriptive material on when each TP might be used. Users should read
through this appendix before finalizing their SFD entries.
Only two TPs can be specified for each observation. Occasionally more than
two TPs are needed. This has been handled by creating some TPs that are
really just combinations of two others. If you see the need to do this
for other TPs, or think additional TPs may be necessary for your program,
contact a HUT PI team member immediately for additional help.
This document was translated by mm2html v1.3 on 13.07.94.
Jon