5.17 Exposure-level Special Requirements [Special_Requirements]

A variety of exposure-level Special Requirements may be chosen; these requirements apply to individual exposures in a visit (visit-level Special Requirements are discussed in Chapter 7, Special Requirements [Visit and Exposure Special_Requirements], on page 111). These requirements will be interpreted by the computer software that is used to schedule the observations; therefore it is essential that the formats of the keyword values shown in Chapter 7 are followed precisely. If none of the allowed Special Requirements appears to be sufficient, you can describe the requirements with a text explanation using the “Comments” keyword. You should contact your Program Coordinator prior to entering such a comment in your proposal.

Several of these Special Requirements require the use of limited resources or may impose serious constraints on the scheduling system (e.g., RT ANALYSIS, REQ UPLINK). These Special Requirements should be used with care.

Text Proposal File

If you are using a Text Proposal File to modify your program, please be aware that only the shortest form of the special requirements will be accepted by APT (e.g., POSition TARGet must be entered as POS TARG). Also, new lines will not be sufficient delimeters for a list of special requirements. You must use semicolons to separate special requirements items.