Notes on MIPS IOC/SV campaign structures: General philosophies: 1) Seek consistency in the timing of calibration measurements 2) Place tasks that are sensitive to telescope and electronics temperature changes (focus check, focal plane survey) towards the ends of campaigns 3) Schedule all Ge tasks with an awareness of the time since the last thermal anneal. For 70um, data should ideally be taken within about 4h after an anneal, for 160um within 2h. For Ge tasks less sensitive to cosmic ray induced responsivity changes, these times increase to 6h and 3h. 4) When possible, minimize slew overheads 5) If an extra downlink is scheduled during a campaign, identify tasks for which the data turnaround time is demanding and run those tasks before the first downlink 6) Schedule tasks to minimize risk. If a tricky AOT or IER is to be run, place it towards the end of the campaign. When there are no other criteria for ordering tasks, schedule the ones that have been run successfully before to run first. The thinking here is that new tasks introduce some risk of an instrument suspend, and we would like to complete as much of a campaign as possible before this unfortunate event. --------------------------------------------------------------------- MIPS CAMPAIGN D1 Start-up activities, Si MIPS-900 30 Scattered background monitor MIPS-950 30 24um First Light MIPS-100 13 24um Voffset Adjustment test MIPS-125 10 Shutdown activities, Si only MIPS-990 12 Comments: The scattered background monitor was the only task between startup and shutdown in campaigns B and C. Putting it first after power-up provides consistency in the timing of this task within a campaign and increases the likelihood of it being run. The 24um first light test involves the first MIPS-PCS interactions and the first use of an AOT, so it introduces some risk of failure. The Voffset test can safely be run after MIPS-100 because we will collect RAW data in MIPS-950, which will let us accomplish the goals of MIPS-125 even if that task does not get run. The nominal requirement for this campaign is a telescope temperature of 40K or lower. The scattered background monitor should be run regardless. The first light task can probably be run successfully at up to 45K. If this criterion is not met, the campaign should probably be deferred until the telescope gets below 45K. --------------------------------------------------------------------- MIPS CAMPAIGN D2 Start-up activities, Si MIPS-900 30 Scattered background monitor MIPS-950 30 IOC Darks, 24um MIPS-910 15 24um Onboard data processing algorithms MIPS-110 33 24um Flat - routine, Phot AOR, field 1 MIPS-917 10 24um Flat - routine, Phot AOR, field 2 MIPS-917 10 24um Ph/SR AOT validation, preliminary MIPS-320 30 24um Focus confirmation MIPS-121 32 Shutdown activities, Si only MIPS-990 12 Comments: For the 24um array, it is not essential that calibration tasks happen at the same time every campaign. As a result, we have flexibility in the scheduling of the 24um darks and flats. The two flat fields are close to each other on the sky, so it makes sense to schedule them back-to-back. The scattered background monitor is virtually identical to IOC darks so the two tasks should be done back-to-back at the same spacecraft pointing. The Ph/SR AOT validation is the one fundamentally new task, so I list it next-to-last to minimize risk. The focus confirmation task is deferred to last to maximize the temperature settling time. The requirement for obtaining generally usable 24um data is a telescope temperature of 33K or lower. The focus check is the only temperature-sensitive task in this campaign, and time pressure to obtain a focus confirmation precludes our postponing this campaign if the 33K temperature requirement is not met. --------------------------------------------------------------------- MIPS CAMPAIGN E Start-up activities, Si MIPS-900 30 Scattered background monitor MIPS-950 30 IOC Darks, 24um MIPS-910 15 24um Flat - routine, Phot AOR, field 1 MIPS-917 10 24um Flat - routine, Phot AOR, field 2 MIPS-917 10 24um Detector response to stims MIPS-115 20 24um Stim cal. with celestial sources MIPS-120 50 24um Focus confirmation MIPS-121 32 Shutdown activities, Si only MIPS-990 12 Comments: Again, it makes sense to put MIPS-950 and MIPS-910 back-to-back, and likewise for the two runnings of MIPS-917. The focus check is again placed last to maximize settling time. Other than that, there is no compelling reason for any of the task ordering in this campaign, so we can shuffle the tasks to reduce slew overheads. --------------------------------------------------------------------- MIPS CAMPAIGN F Start-up activities, Si MIPS-900 30 Scattered background monitor MIPS-950 30 IOC Darks, 24um MIPS-910 15 24um Flat - routine, Phot AOR MIPS-917 10 24um Focal plane survey (coarse) MIPS-130 126 24um Focus confirmation MIPS-121 32 24um Optimum bias setting MIPS-245 120 Shutdown activities, Si only MIPS-990 12 Comments: This campaign is tricky. MIPS-245 is disruptive to the array so I list it last. This is a change from our usual approach of putting focal plane survey measurements towards the end of a campaign. Since this is a first coarse measurement, I figure that we can tolerate a small amount of temperature drift. This is our only focus check after the focus change, so I put the focus confirmation after the focal plane survey. If Jocelyn insists on putting MIPS-121 and MIPS-130 after MIPS-245, MIPS-245 should be put right after MIPS-950 and the order of MIPS-910 and MIPS-917 should be swapped. This campaign includes our only focus check after the focus change, so MIPS-121 should be deferred to a later campaign if the focus was not updated before this campaign. --------------------------------------------------------------------- MIPS CAMPAIGN G time since Start-up activities, Si and Ge MIPS-905 35 Ge anneal Scattered background monitor MIPS-950 30 24 IOC Darks, 24um MIPS-910 15 54 70um First light and Ph/SR AOT val.(Prel)MIPS-322 18 69 70um Stim response MIPS-247 20 87 70um Voffset adjustment test MIPS-126 5 107 24um Spectral leak check MIPS-240 50 112 70um On-board data processing algorithms MIPS-111 15 162 24um Flat - routine, Phot AOR MIPS-917 10 177 24um Focal plane survey (coarse) MIPS-130 126 187 Shutdown activities, Ge and Si MIPS-992 19 313 Comments: It still makes sense to put the scattered background monitor test first so that the Ge arrays have a little settling time before first operations. The 24um dark is scheduled next to maximize our pointing efficiencies. Since no thermal anneals are scheduled during the campaign, I scheduled all Ge tasks early, before much radiation damage will occur. The Ge tasks run a total of an hour. I placed MIPS-240 before MIPS-111 so that we could measure the effects of radiation damage over nearly a 2-hour window. MIPS-111 completes less than 3h after the 70um thermal anneal, so the radiation damage should be reasonable. Other than that, there is no justification for the detailed ordering of the 70um tasks. The focal plane survey is listed last to maximize the settling time. The telescope should be about 9K during this test, with a requirement for 70um first operations of 15K. If the telescope is still above 15K, the 70um tasks should be postponed. --------------------------------------------------------------------- MIPS CAMPAIGN H time since Start-up activities, Si and Ge MIPS-905 35 Ge anneal Routine 24um flux standard MIPS-920 11 24 Scattered background monitor MIPS-950 30 35 Routine 24um flux standard MIPS-920 11 65 160um First light and Ph/SR AOT val.(Prel)MIPS-324 18 76 160um Stim response MIPS-248 10 94 Routine 24um flux standard MIPS-920 11 104 IOC Darks, 160um MIPS-912 9 115 IOC Darks, 24um MIPS-910 15 124 Routine 24um flux standard MIPS-920 11 139 IOC Darks, 70um MIPS-911 30 150 160um Voffset adjustment test MIPS-127 5 180 Routine 24um flux standard MIPS-920 11 185 70um Spectral leak check MIPS-241 50 196 Ge Anneal and recovery MIPS-930 12 246 160um IC - routine, Phot AOR MIPS-919 21 10 70um IC - routine, Phot AOR MIPS-918 21 31 160um On-board data processing algorithmsMIPS-112 15 52 Calibration stars against different bkgdsMIPS-921 60 67 70um WF Focal plane survey (coarse) MIPS-132 126 127 24um Flat - routine, Phot AOR MIPS-917 10 253 24um Flat - routine, Phot AOR MIPS-917 10 24um Scan AOT validation (Preliminary) MIPS-326 18 24um Frame table update sanity check MIPS-960 8 Periodic IRU Calibration updates PCS-055 36 Periodic PCRS/STA alignment filter updatesPCS-105 12 Shutdown activities, Ge and Si MIPS-992 19 Comments: The driving factor at the start of this campaign is the multiple runs of MIPS-920. These 5 repeats are designed to study the stability of the 24um array response over the first several hours after instrument power-up. To accomplish this, we need to run MIPS-920 right after MIPS-905 and then again at semi-regular intervals over the next several hours. The other big influencing factor is the need to schedule 227m of 70um, 78m of 160um activities, and 90m of tasks covering all 3 arrays (MIPS-950 and MIPS-921) within the windows of good Ge operations following the anneals. The Ge anneals occur fairly early during the startup activities, further restricting the available Ge test time. The result of all this is a 3-part campaign structure, with a mix of 24um responsivity checks and Ge tasks during the first part, with a variety of Ge tasks and the FPS in the second part, and with the remainder of the 24um tasks in the third part. ---------------------------------------------------------------------