To: alberto@ipac.caltech.edu Cc: chad@as.arizona.edu, dhines@as.arizona.edu, latter@ipac.caltech.edu, jkeene@sirtfweb.jpl.nasa.gov, dlp@ipac.caltech.edu Subject: weeks 9-10 campaign structures Hi, The following discussion covers the proposed sequence of MIPS tasks for weeks 9-10, campaigns O,P,Q. Doug --------------------------------------------------------------------- MIPS CAMPAIGN O Time since Start-up activities, Si and Ge MIPS-905 35 Ge anneal IOC Darks, 160um MIPS-912 15 24 IOC Darks, 70um MIPS-911 30 39 IOC Darks, 24um MIPS-910 15 69 24um Flat - routine, Scan AOR MIPS-914 13 84 160um IC - routine, Scan AOR MIPS-916 13 97 70um IC - routine, Scan AOR MIPS-915 13 110 SED Slit Illumination Function MIPS-299 20 123 Slew State Validation MIPS-220 45(70/160phot) 143 Periodic PCRS/STA alignment filter updatesPCS-105 12 188 70um Dark Position Test MIPS-080 40 200 Ge Anneal and recovery MIPS-930 12 240 Read Noise Stability 1 MIPS-261 67 10 Electronic Nonlinearities Verification MIPS-180 60 77 SED Mode Slit Profile MIPS-140 40 137 SED Throughput Dependence on CSMM Pos. MIPS-148 30 177 AOT Cluster Option Validation MIPS-355 50(70SED)207 Ge Anneal and recovery MIPS-930 12 257 Flux Calibration 2 MIPS-351 83 10 Total Power Skeleton AOT Validation MIPS-330 55(70/160tp) 93 CSMM Gain Measurement Test MIPS-081 30(70NF) 148 Periodic PCRS/STA alignment filter updatesPCS-105 12 178 24um Ph/SR AOT Validation, Final MIPS-321 144 190 Cosmic Ray Limits on Int. Times, 24um MIPS-250 80 334 Ge Anneal and recovery MIPS-930 12 414 Read Noise Stability 2 MIPS-262 67 10 160um Frame Table Update Sanity Check MIPS-963 11 77 Photometry of a Circumstellar Disk MIPS-275 30(70/160phot) 88 Shutdown activities, Ge and Si MIPS-992 19 118 Downlink tuning and slews 84 Downlink data 24 Periodic PCRS/STA alignment filter updatesPCS-105 12 Periodic IRU Calibration updates PCS-055 36 Margin 115 Time allocation for PCRS and IRU calibrations 72 Comments: This is our first campaign run using an OPST generated master. There is no overriding theme to this campaign, and the Ge tasks are the only thing that drives the schedule. The first 6 tasks follow the normal startup sequence, plus an SED-mode IC, which probably ought to be a part of the standard sequence. The flats and ICs are measured in bright sky regions. The slew state validation task requires performing photometry on calibration stars on either side of a very bright source such as Orion, with a slew over the bright source in between. This likely requires observations at low Galactic latitudes, which is why I propose putting it right after the ICs. This also allows completion of the task within 3h after an anneal, which is necessary because the task includes 160um photometry. The 70um dark position test requires very bright sky regions so it is scheduled next. After the anneal, the first task is the read noise stability test, which is required to come right after a thermal anneal. The second running of this test occurs immediately after the third anneal of the campaign. The time separation between the two trials is about 8 hours. The electronic nonlinearities test must be run while the cosmic ray damage is minimal, so it is scheduled right after the first read noise test. It uses internal stims for illumination and is best run in a dark sky region. It is being run well after the CE power-on, so the electronics ought to be thermally stable. The next three tasks all involve SED mode observations and are likely to be run while pointing at the CVZ. The first task after the second thermal anneal is flux calibration task MIPS-351, which is a repeat of task MIPS-350 from campaign K. This task is a superset of the usual flux standard tasks MIPS-920,922,924, which are performed right after an anneal in the standard startup sequence. To match the usual sequence and to assure best array performance, it would be best if the MIPS-351 observations were performed in the sequence 160um first, then 24um and 70um. The next task is the total power skeleton AOT validation. This calls for observing a field containing a calibration star, which is why it is naturally paired with the flux calibration task. The CSMM gain measurement test also involves observations of calibration stars, so it is placed next. The 24um PH/SR AOT validation will probably also involve observations of flux standards, so it is a natural task to put next. I am putting the 24um tasks here rather than after the last anneal to maximize the time between the two read noise stability tests. The last task of this anneal set is the 24um cosmic ray limits on integration times task. It involves observing low brightness sky so will involve pointing at the CVZ, the same as the tasks that precede and follow it. The first task after the last anneal is the second part of the read noise stability test. This is followed by a 160um frame table sanity check. This involves a 160um photometry observation and will probably be performed in the CVZ. The last task is to perform photometry on a circumstellar disk. This task includes 160um photometry so it needs to be done soon after a thermal anneal. --------------------------------------------------------------------- MIPS CAMPAIGN P Time since Start-up activities, Si and Ge MIPS-905 35 Ge anneal IOC Darks, 160um MIPS-912 15 24 IOC Darks, 70um MIPS-911 30 39 IOC Darks, 24um MIPS-910 15 69 24um Flat - routine, Scan AOR MIPS-914 13 84 160um IC - routine, Scan AOR MIPS-916 13 97 70um IC - routine, Scan AOR MIPS-915 13 110 70um NF Illumination correction MIPS-313 19 123 Periodic PCRS/STA alignment filter updatesPCS-105 12 142 Periodic IRU Calibration updates PCS-055 36 154 Ge Anneal and recovery MIPS-930 12 190 Flux Calibration 3 MIPS-352 83 10 Cosmic Ray Limits on Integration Times MIPS-251 45 93 Ge Anneal and recovery MIPS-930 12 138 70um Ph/SR AOT Validation - final MIPS-323 186 10 24um Red Cross Calibration MIPS-353 24 196 Periodic PCRS/STA alignment filter updatesPCS-105 12 220 Ge Anneal and recovery MIPS-930 12 232 Scan AOT Validation - med speed MIPS-327 300 10 Shutdown activities, Ge and Si MIPS-992 19 310 Downlink tuning and slews 84 Downlink data 12 Margin 96 Time allocation for PCRS and IRU calibrations 60 Ge Anneal and recovery - delete this one MIPS-930 12 Comments: The main tasks in this campaign are the medium speed scan AOT validation, which builds off of the 24um preliminary scan AOT validation from campaign H, and the 70um Ph/SR AOT validation, which builds off of the preliminary validation from campaign G. The campaign starts with a standard suite of startup tasks, including darks, ICs, and flux standards. The cosmic ray limits to integration times involves 70um and 160um observations of dark sky. It is likely to be near the CVZ so involves minimal slew time after the standards. Placing it here also gets the test completed soon enough after the thermal anneal for good 160um array behavior. If we are pressed to save some time, we could place MIPS-323 and MIPS-353 next and eliminate another thermal anneal. The long scanmap is the highest risk activity in the campaign so I am inclined to save it for last. That means running the Ph/SR AOT and red cross calibrations next. The PCRS task timing would be better if I ran the scanmap first, so we ought to consider swapping these tasks around. There is no reason for a 4th Ge anneal during this campaign. --------------------------------------------------------------------- MIPS CAMPAIGN Q Time since Start-up activities, Si and Ge MIPS-905 35 Ge anneal IOC Darks, 160um MIPS-912 15 24 IOC Darks, 70um MIPS-911 30 39 IOC Darks, 24um MIPS-910 15 69 Dark Verification, 24um MIPS-190 21 84 Dark Verification, 160um MIPS-192 16 105 Periodic PCRS/STA alignment filter updatesPCS-105 12 121 160um IC - detailed, Scan AOR MIPS-307 66 133 70um IC - detailed, Scan AOR MIPS-306 66 199 24um Flat - detailed, Scan AOR MIPS-305 66 265 Ge Anneal and recovery MIPS-930 12 331 160um Flux standards MIPS-924 20 10 Routine 24um Flux standard MIPS-920 11 30 70um Flux standards MIPS-922 12 41 Scan Map of Large PN or SNR MIPS-285 125 53 Ge Anneal and recovery MIPS-930 12 178 Observing Mode Relative Throughputs MIPS-150 180 10 Periodic PCRS/STA alignment filter updatesPCS-105 12 190 Ge Anneal and recovery MIPS-930 12 202 Scan AOT Validation - slow speed MIPS-328 450 10 Ge Anneal and recovery - during scan AOT MIPS-930 12 160 Ge Anneal and recovery - during scan AOT MIPS-930 12 150 Periodic PCRS/STA alignment filter updatesPCS-105 12 150 Periodic IRU Calibration updates PCS-055 36 162 Ge Anneal and recovery MIPS-930 12 198 Off-axis Glints MIPS-317 900 10 Ge Anneal and recovery - during MIPS317 MIPS-930 12 190 Periodic PCRS/STA align - during MIPS317 PCS-105 12 180 Ge Anneal and recovery - during MIPS317 MIPS-930 12 192 Ge Anneal and recovery - during MIPS317 MIPS-930 12 180 Periodic PCRS/STA align - during MIPS317 PCS-105 12 180 Ge Anneal and recovery - during MIPS317 MIPS-930 12 192 Ge Anneal and recovery MIPS-930 12 180 70um WF Focal Plane Survey (Fine) MIPS-133 252 10 Periodic PCRS/STA alignment filter updatesPCS-105 12 262 Periodic IRU Calibration updates PCS-055 36 274 Ge Anneal and recovery - delete? MIPS-930 12 310 24um Focal Plane Survey (Fine) #1 MIPS-131 402 10 or 322 Periodic PCRS/STA alignment filter updatesPCS-105 12 412 or 724 Shutdown activities, Ge and Si MIPS-992 19 424 or 736 Downlink tuning and slews 231 Downlink data 22 Margin 377 Time allocation for PCRS and IRU calibrations 168 Comments: This campaign is dominated by several very long tasks. The FPS tasks are deferred until late to ensure good CE temperature stability. The standard startup routines had to be altered. The darks follow the usual pattern. By imposing the dark verification tests (which check to see if dark current is independent of integration time) between the darks and the ICs, I guarantee that sufficient time has elapsed to allow the Ge fast/slow behavior to settle out. The detailed flats and ICs take much longer than usual so the 160um IC had to be placed first based on anneal considerations. The 70um IC was placed next for similar reasons. The 24um flats are run last. The flux standard observations follow the standard startup routine. This leaves about 2h available for Ge observations before the next thermal anneal is needed. The PN/SNR scanmap observation fits nicely into this window, which is why I placed it next. Besides, it is my favorite task in this campaign. MIPS-150 involves observations of a couple of point sources and of one extended source with all three arrays. It needs to be run right after an anneal to ensure good 160um data, and it takes up the entire anneal cycle. The scanmap AOT validation and off-axis glint tests are both long enough that no special scheduling constraints need be considered. They will both require thermal anneals in the middle of the test. Due to their length, each test will likely comprise several AORs with thermal anneals in between. These long tests are higher risk than the tasks that came earlier in the campaign, which is why I didn't schedule them earlier. The focal plane survey tasks come next. They were scheduled this late in the campaign to ensure good thermal stability. I put the 70um FPS first for anneal considerations. The anneal after this task is optional. I think we would be better served by skipping the anneal and treating this as a complementary test to MIPS-160, 70um and 160um thermal anneal behavior. We would accumulate 11h of cosmic ray damage, and we could see how the 70um and 160um response to the sky changes during that time, including a responsivity check and checks for spiking and nonlinear behavior.