I am posting this excerpt from the 4Q1999 preliminary schedule notes to make sure that it is not missed in that massive and routine mailing. See also apo35-general message #370. Ed Turner +++++ IMPORTANT NOTE: Starting this quarter, scheduled telescope time runs from nautical to nautical (-12 deg) twilight rather than being bounded by the astronomical (-18 deg) twilights. This adds approximately one hour of scheduled time per night. In addition, the first and last scheduled program of the night is *assumed* by *default* to have use of the time between sunset or sunrise, respectively, and nautical twilight for either calibration or observing. The first scheduled observer of the night should thus be available to commence operations at the time of APO sunset or should inform site staff in advance if the pre-nautical twilight time is not needed. Likewise, site staff will inform the relevant observer as early as possible if engineering activities will pre-empt the telescope before/after nautical twilight, as will sometimes happen. Neither institutions nor programs will be charged for the use of time between nautical twilight and sunset/sunrise, of course. These changes in policy are intended to formalize what has become our de facto practise. APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 382 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO