File mdi_sheet6.txt -- Last modified Wed Sep 27 17:33:48 1995



                   COMMISSIONING PHASE BLOCK SHEET

1. INSTRUMENT AND BLOCK NUMBER: MDI, Block 6

2. BLOCK IDENTIFICATION: MDI Participation in Joint Commissioning Activities

3. PURPOSE: Obtain calibration and jitter data during coordinated 
   pointing and disturbance tests

4. SUB-BLOCKS: (see Note 1)
   NR.   IDENTIFICATION

   6.1   Off-Pointing Calibration (C. Frohlich)
   MDI will collect images continuously during the de-pointing test, which 
   takes 30 arcsec steps out to 10 arcminutes in each axis, N/S and E/W.

   6.2   Calibration Rolls (R. Howard)
   MDI will collect images for at least 30 minutes at each roll angle in 
   this test.

   6.3   S/C Short Term Pointing Stability (R. Bush)
   MDI will collect ISS data on the pointing stability and jitter during 
   mechanism operations of several instruments and the reaction wheels.

   6.4  Intercalibration JOP 4:  SUMER/CDS/EIT/MDI Coalignment
   MDI will take magnetograms and intensity images during this JOP to 
   establish the coalignment.

5. SUB-BLOCKS TABLE: (see Note 2)
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   6.1   11 hr      After 2.12   NRT-s        H2     Pitching, Yawing
   6.2    4 hr      After 2.12   NRT-s        H2         Rolling
   6.3    8 hr      After 2.11   NRT-s        H2          Nom.
   6.4    1 hr      After 3.5    NRT-s        H2          Nom.

6. SCHEDULING REQUIREMENTS: (see Note 3)

   6.1-2 operations are scheduled in conjunction with the special maneuvers.

   Instrument portions of 6.3 may be done all in one 8-hour pass; or
   individual experiments can be done separately, with another scheduled 
   period of combined operations.  Reaction wheel measurements should be
   done at times judged most interesting by S/C experts, i.e., times when
   smallest and largest disturbances are expected.  Individual measurements 
   of one instrument or reaction wheels can be done in < 1 hour each.

   6.4 may be considered as one of the campaigns requested in sub-blocks 
   5.2 and 5.3; if it is desired to run earlier, the period of sub-block 
   4.1 (Observing Program Checkout) is also appropriate.

7. SPECIAL REQUIREMENTS: (see Note 4)
   All require coordination among experiments & S/C
   VC-2 data is required for much (if not all) of 6.3

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
   6.1 & 6.2 MDI acquires images for off-line calibration of roll and 
       offset pointing sensitivity of Doppler and intensity measurements.

   6.3 MDI acquires depointing and jitter measurements to assess 
       the quiescent pointing stability and the level of various disturbances 
       produced by other experiments and mechanisms.

9. RELEVANT PROCEDURES
   N/A

10. CROSS-REFERENCE TO TEST SHEETS: (list identifiers for test sheets)
    TBS

11. RELEVANT SECTION OF TIMELINE (backpage)