File lasco_sheet4.txt -- Last modified Mon Oct 16 10:57:55 1995

                   COMMISSIONING PHASE BLOCK SHEET

1. INSTRUMENT AND BLOCK NUMBER: LASCO, Block 4

2. BLOCK IDENTIFICATION: LASCO/EIT HALO ORBIT OPERATIONS

3. PURPOSE: Halo Orbit Operations

4. SUB-BLOCKS:
   NR.   IDENTIFICATION
   4.1   Close Doors for Halo Orbit Insertion Maneuver
   4.2   Open Doors after Halo Orbit Insertion Maneuver
   4.3   Normal Operations

5. SUB-BLOCKS TABLE:
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   4.1    0:20       Block 1     NRT-d         H or M     Nom.
   4.2    0:20       Nom.        NRT-d         H or M     Nom.
   4.3    8:00       Nom.        NRT-d and s   H or M     Nom.

6. SCHEDULING REQUIREMENTS:
   4.1 must be performed 1 day prior to HOI Maneuver
   4.2 must be performed at least 24 hours after HOI Maneuver
   4.3 must be performed after 4.2

7. SPECIAL REQUIREMENTS:
   4.3 will continue during non-contact periods.

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
   Normal operations

9. RELEVANT PROCEDURES
   None

10. CROSS-REFERENCE TO TEST SHEETS: (list identifiers for test sheets)
    None

11. RELEVANT SECTION OF TIMELINE:

BLOCK4 -- NORMAL OPERATIONS

BLOCK4.1 -- CLOSE DOORS FOR HOI MANEUVER 
119 & 00:00 #  Close C1, C2, C3, EIT Doors

BLOCK4.2 -- OPEN DOORS AFTER HOI MANEUVER
121 & 00:00 #  Open C1, C2, C3, EIT Doors

BLOCK4.3 -- BEGIN LASCO AND EIT HALO ORBIT OPERATIONS
121 & 04:00 #  Begin LASCO and EIT Halo Orbit operations
;           Synoptic observations
;           Susceptibility checks
;           Coronal Hole program
;           Streamer program
;           CME watch program
;           Calibrations
;           Inter-instrument communication