File mdi_sheet5.txt -- Last modified Wed Sep 27 17:33:07 1995 COMMISSIONING PHASE BLOCK SHEET 1. INSTRUMENT AND BLOCK NUMBER: MDI, Block 5 2. BLOCK IDENTIFICATION: MDI Scientific Observations 3. PURPOSE: First Science Observations 4. SUB-BLOCKS: (see Note 1) NR. IDENTIFICATION 5.1 27-day Structure Program Continuous medium-rate helioseismology observations for one solar rotation. This is a preview of the 2-6 year (near) continuous time series which will begin shortly after Halo orbit commissioning. 5.2 Campaigns with the Structure Program Eight-hour high rate observations with various scientific objectives, which run in parallel with the structure program. 5.3 Special Campaigns Eight-hour high rate observations with various scientific objectives, which cannot run in parallel with the structure program and therefore must be run before the long continuous time series begins. An example is JOP 30 on High Frequency Waves which requires a fast cadence incompatible with parallel operation. Other examples might be observations when the S/C is rolled 90 degrees, for CDS & SUMER studies of polar coronal holes. 5.4 80-hour Dynamics Program A preview of the 2-month continuous Dynamics Program, run both to verify the ground data systems and to study the effects of supergranulation on the seismology measurements. JOP 22 on Dynamics of the Quiet Network might be run concurrently. 5. SUB-BLOCKS TABLE: (see Note 2) NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING 5.1 27 days X 4.2 None M Nom. 5.2 20 x 8 hrs X 4.2 NRT-s H2 Nom. 5.3 6 x 8 hrs X 4.2 NRT-s H2 Nom. or rolled 5.4 80 hrs X 5.1-3 NRT-s H2 Nom. 6. SCHEDULING REQUIREMENTS: (see Note 3) 5.1 continuous nominal observing for 27 days is preferred, but some small gaps (total < 10 %) are tolerable. 5.2 should be done during the high rate passes of the same period as 5.1 5.3 cannot be done during the 5.1 period; the 6 days need not be consecutive--some gaps are preferable. 5.4 can be done simultaneously with 5.1 but this is not required. 7. SPECIAL REQUIREMENTS: (see Note 4) 5.2 & 5.3 on some days will be JOPs coordinated with other experiments. 5.4 needs continuous high rate telemetry (VC3); it is an opportunity for JOP 22 with other experiments. 8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT: MDI acquires scientifically meaningful data. 9. RELEVANT PROCEDURES N/A 10. CROSS-REFERENCE TO TEST SHEETS: (list identifiers for test sheets) TBS 11. RELEVANT SECTION OF TIMELINE (backpage) {Some of the details in this material are now incorrect} BLOCK5 -- MDI SCIENTIFIC OBSERVATIONS BLOCK5.1 -- BEGIN NOMINAL OBSERVATIONS 80 & 00:00 # Begin nominal observations # Duration 30 days Continuous Structure program Daily FD & HR magnetograms First priority campaigns Periodic calibrations COMMENT: Stable nominal pointing is required for all of these activities. It is hoped to run the Structure Program for 27 continuous days, but some interruptions might be negotiated. BLOCK5.2 -- SPECIAL TESTS AND CAMPAIGNS 110 & 00:00 # Special tests and campaigns # Duration 5 days COMMENT: An example of these would be JOP 2 to observe a polar coronal hole with the spacecraft rolled 90 degrees for an extended period ( > 8 hours), during which MDI would run the Dynamics & Structure programs to get a time series of useful data on instrumental effects. A second example is JOP 9 with MDI taking high resolution magnetograms and white light images for accurate coalignment with CDS and SUMER on the disk. Another possibility is a TBD JOP on high frequency waves in the photosphere, transition region, and corona: MDI has a high frequency observing sequence which must be run early in the mission (before the long, uninterruptable helioseismology time series begin), and simultaneous SUMER, EIT and CDS observations would be very valuable.