File swan_sheet2.txt -- Last modified Fri Aug 25 10:37:41 1995


                   COMMISSIONING PHASE BLOCK SHEET

1. INSTRUMENT AND BLOCK NUMBER: SWAN, Block 2

2. BLOCK IDENTIFICATION: Moon and geocorona observation

3. PURPOSE: Use proximity of moon and earth for science observations

4. SUB-BLOCKS: (see Note 1)
   NR.   IDENTIFICATION
   2.1   Moon Observations
   2.2   Geocoronal Observation

5. SUB-BLOCKS TABLE: (see Note 2)
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   2.1     01:00    Nom. X 1.4    NRT-d        M	  Nom.
   2.2     03:00    X 1.4, 2.1    NRT-d        M          Nom.

6. SCHEDULING REQUIREMENTS: (see Note 3)
   If SWAN Block 2 cannot be carried out before the end of day
   5, it shall be cancelled, since SOHO will be too far removed
   from the targets. Execution then proceeds with block 3.

7. SPECIAL REQUIREMENTS: (see Note 4)
   Early operation: coordination with FOT required

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
   Scientifically meaningfuldata from geocorona and moon collected

9. RELEVANT PROCEDURES
   None

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

11. RELEVANT SECTION OF TIMELINE (backpage)

BLOCK 2: MOON AND GEOCORONA OBSERVATION

Block 2.1: Moon Observation
a. 4 & 08:00
b. 4 & 04:00
c. 6 & 00:00
d. 01:00	(automatic after initial verification)
e. N/A
f. Initial NRT-commanding only, 6 OBDH block TCs with about 10 words each
g. Block 1.3 was successful, no thruster activation planned for 1 hour,
	at least 30 min RT-contact available
h. 3

Block 2.2 Geocoronal Observation
a. 4 & 10:00
b. 4 & 05:00
c. 6 & 00:00
d. 03:00	(automatic after initial verification)
e. N/A
f. Initial NRT-commanding only, 6 OBDH block TCs with about 10 words each
g. Block 1.3 was successful, no thruster activation planned for 1 hour,
	at least 30 min RT-contact available
h. 2