File uvcs_sheet3.txt -- Last modified Wed Nov  1 14:20:51 1995

                   COMMISSIONING PHASE BLOCK SHEET

1. INSTRUMENT AND BLOCK NUMBER: UVCS, Block 3

2. BLOCK IDENTIFICATION: UVCS functional tests and calibrations

3. PURPOSE: Verify and calibrate mechanisms
            NOTE: for UVCS functional tests and calibration are
                  interleaved and shall not be separated by blocks

4. SUB-BLOCKS: (see Note 1)
   NR.   IDENTIFICATION
   3.1   XDL checkout and start scrub
   3.2   End scrub, configure detectors
   3.3   Open aperture door
   3.4   Deploy Roll/Pointing Mechanisms & Checkout Sun Sensor
   3.5   Preliminary Observations
   3.6   Deploy Mirror and Polarizer Mechanisms
   3.7   Check out Visible Light Channel
   3.8   Observations and Stray Light Measurements with Mirror Unlocked
   3.9   Deploy Gratings
   3.10  Preliminary Observations with Grating Unlocked
   3.11  Preliminary Flat Field Calibration
   3.12  Deploy Internal Occulter Mechanism
   3.13  Preliminary Observations with Mirror and Occulter Unlocked
   3.14  Check out Slits, Filters
   3.15  Second Flat Field Calibration
   3.16  Checkout Pre-defined sequences

5. SUB-BLOCKS TABLE: (see Note 2)
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   3.1    8:00       Nom.        NRT-d         H         None
   3.2    3:30       Nom.        NRT-d         H         None
   3.3    1:00       Nom.        NRT-d         H         Nom.
   3.4.1  4:00       Nom.        NRT-d         H         Nom.
   3.4.2  4:00       Nom.        NRT-s         H         Nom.
   3.4.3  6:00       Nom.        NRT-d         H         Nom. (1)
   3.4.4  4:00       Nom.+(2)    NRT-d         H         Nom. (1)
   3.4.5  2:00       Nom.+(3)    NRT-d         H         Nom.
   3.4.6  2:00       Nom.        NRT-d         H         Nom.
   3.5    8:00       Nom.        NRT-d         H         Nom.
   3.6    6:00       Nom.        NRT-d         H         Nom.
   3.7.1  2:00       Nom.        NRT-s         H         Nom.
   3.7.2  6:00       Nom.        NRT-d         H         Nom.
   3.8.1  7:00       Nom.        NRT-d         H         Nom.
   3.8.2  7:00       Nom.        NRT-d         H         Nom.
   3.8.3  7:00       Nom.        NRT-d         H         Nom.
   3.9    4:00       Nom.        NRT-d         H         Nom.
   3.10.1 6:00+      Nom.       NRT-d+(4)      H         Nom.
   3.10.2 8:00       Nom.        NRT-d         H         Nom.
   3.11.1 0:30       Nom.        NRT-d         H         Nom.
   3.11.2 7:30       Nom.        NRT-s         H         Nom.
   3.11.3 8:00       Nom.        NRT-s         H         Nom.
   3.11.4 8:00       Nom.        NRT-s         H         Nom.
   3.11.5 7:15       Nom.        NRT-s         H         Nom.
   3.11.6 0:45       Nom.        NRT-d         H         Nom.
   3.12.1 1:00       Nom.        NRT-d         H         Nom.
   3.12.2 7:00       Nom.        NRT-s         H         Nom.
   3.13.1 5:00       Nom.        NRT-d         H         Nom.
   3.13.2 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)
   3.13.3 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)
   3.13.4 0:10       Nom.        NRT-d         H         Nom.
   3.14   4:30       Nom.        NRT-s/d (5)   H         Nom.
   3.15.1 8:00       Nom.        NRT-d         H         Nom. (6)
   3.15.2 8:00       Nom.        NRT-d         H         Nom. (6)
   3.16.1 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)
   3.16.2 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)
   3.16.3 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)
   3.16.4 8:00       Nom.        NRT-s/d (5)   H         Nom. (6)

 
   (1) Prerequisite: SOHO pointing must be stable to +/- 5 arcsec
   (2) SOHO/UVCS SS intercal. (Absolute Pointing, J5) need be completed
   (3) SOHO Jitter (J4) test need be completed
   (4) Sequence to be continued after end of NRT time
   (5) Shared NRT, interspersed with occasional short NRT-d
   (6) Sequence continues for 24 hours/day

6. SCHEDULING REQUIREMENTS: (see Note 3)
   3.1 takes whole NRT session
   3.2 14 days after 3.1 (flexible 13-15)
   3.3 preferable one day after 3.2
   3.4.1 and 3.4.2 preferably on same day
   3.4.3 preferably the day after 3.4.2, and same for subsequent
       (3.4.4 preferably one day after 3.4.3, etc.)
   3.5 full contact period 
   3.7.2 preferably one day after 3.7.1
   3.11.1 and 3.11.2 on same day. 3.11.5 and 3.11.6 on same day
   Other 3.11.n on subsequent days
   3.12 items on same day
   3.13.n preferably on subsequent days
   3.15, 2 days continuous, 24 hours/day
   3.16, 4 days continuous, can be interrupted at the end of each day

7. SPECIAL REQUIREMENTS: (see Note 4)
   3.10.1 includes sequence to be continued at end of contact time
   3.12.2 represents full-time observations, continued after NRT
   3.13.2, 3.13.3, 3.15,and 3.16 also represent continuation 24 
   hours/day

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
   UVCS ready for science operations

9. RELEVANT PROCEDURES
   N/A?

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

11. RELEVANT SECTION OF TIMELINE (backpage)

BLOCK3 -- UVCS FUNCTIONAL TESTS AND CALIBRATIONS

BLOCK3.1 -- XDL CHECKOUT AND START SCRUB

     35 & 00:00 # Load onboard Image Tables # (dedicated)

     35 & 00:40 # Enter Diagnostic mode # Enable primitive command flags (ded.)

     35 & 00:50 # Partially open door # (dedicated)

     35 & 01:00 # Checkout LYA detector without illumination # (dedicated)

     35 & 02:30 # Checkout OVI detector without illumination # (dedicated)

     35 & 04:00 # Switch ON scrub lamp # monitor lamp current and temp. (ded.)

     35 & 04:05 # Configure LYA detector for scrub # (dedicated)
    
     35 & 06:00 # Configure OVI detector for scrub # (dedicated)

     35 & 08:00 # Start scrub period # takes 2 weeks (shared)

BLOCK3.2 -- END SCRUB, CONFIGURE DETECTORS

     49 & 00:00 # Turn off scrub lamp # End scrub period # (dedicated)

     49 & 00:05 # Switch off LYA and OVI detector HV
     
     49 & 00:10 # Configure LYA detector for observations # HV off (dedicated)

     49 & 02:00 # Configure OVI detector for observations # HV off (dedicated)

BLOCK3.3 -- Open Aperture Door (takes 1 hr)

     50 & 04:10 # Switch OFF heater power # (dedicated)

     50 & 04:15 # Close partially open door # Use MPSTEP command (dedicated

     50 & 04:30 # Fully open Aperture Door # Use DOOR command (dedicated)
 
     50 & 05:00 # Switch ON heater power (dedicated)

BLOCK3.4 -- Deploy Roll/Pointing Mechanisms & Checkout Sun Sensor (SS) (takes 1 week)

3.4.1
     51 & 00:00 # Unlock instrument and deploy pointing mechanism # (dedicated)

;    The pointing procedure takes about three days (UVCS EOM, Draft 2, p. 33)

3.4.2

     51 & 04:00 # Pointing checkout # Check PTCRSE command (shared)

     51 & 06:00 # Check out Roll Mechanism # Also, test roll limits (shared)

3.4.3

     52 & 00:00 # Point to solar disk center # (dedicated)
;               # Prerequisite: SOHO pointing must be stable to +/- 5 arcsec.

     52 & 02:00 # Checkout Sun Sensor (SS) Interrupt # (shared)
;               # Prerequisite: SOHO pointing must be stable to +/- 5 arcsec.

     52 & 03:00 # Sun Sensor intercalibration # (ded.)
;      
         # Prerequisite: SOHO pointing must be stable to +/- 5 arcsec.

     52 & 05:00 # Insert data in onboard SS Calib. table (SUNCLT) # (ded.)

?? SOHO/UVCS SS intercal.

     52 & 06:00 # SOHO/UVCS SS intercal. # Coord. with other exp's/FOT (shared)
          
     53 & 00:00 # Checkout pointing based on SS feedback # PTFINE cmd (shared)

3.4.4

     53 & 02:00 # Check UVCS roll/SS opt. axis; UVCS/SOHO SS opt. axis # (ded.)
;               # Prerequisite: SOHO pointing must be stable to +/- 5 arcsec.

     53 & 05:00 # Checkout "SunCenter" alignment # (dedicated)

3.4.5

     54 & 00:00 # Jitter test # Check disturbances on S/C and other instr's
;               # Prerequisites: a) coordinate with MDI, SUMER, GOLF, etc.
;               #                b) MDI High-resolution mode
;               #                c) SOHO pointing must be stable to 1 arcsec

     54 & 04:00 # Determine UVCS thermal performance # at several roll angles

3.4.6

     55 & 04:00 # Check Auto Heater Control function # at several roll angles

BLOCK3.5 -- Preliminary Observations with All Mechanisms Locked (takes 8 hrs)

;    (This is the first UVCS observation. Slits in TBD launch configuration)

     56 & 00:00 # Roll FOV to coronal hole and point to sun center # (ded.)

     56 & 00:30 # Enter Operations mode # Verify SS Interrupt (dedicated)

     56 & 00:45 # Configure LYA detector for observations # HV ON (dedicated)

     56 & 01:30 # Acquire image(s) of coronal spectrum in LYA channel # (ded.)

     56 & 02:20 # Configure OVI detector for observations # HV ON (ded.)

     56 & 03:05 # Acquire image(s) of coronal spectrum in OVI channel # (ded.)

     56 & 03:55 # Acquire image(s) in LYA and OVI ch's simultaneously # (ded.)

     56 & 04:45 # Roll to brighter target and readjust pointing offset # (ded.)

     56 & 05:15 # Acquire image(s) in LYA and/or OVI on brighter target# (ded.)

     56 & 07:45 # Switch OFF LYA and OVI detector HV # enter Pre-Ops mode 

     
BLOCK3.6 -- Deploy Mirror and Polarizer Mechanisms (takes 6 hrs)

     57 & 00:00 # Unlock mirror launch lock # Use paraffine actuator (ded.)

     57 & 00:30 # Switch ON 6 V Mechanism power # check voltage level (ded.)

     57 & 01:00 # Checkout mirror mechanism # move over full range (ded.)

     57 & 02:00 # Checkout "Offset" type # for safety checking; cfr. EOM (ded.)

     57 & 04:00 # Checkout Polarizer mechanism # update onboard Pol. Par. table

BLOCK3.7 -- Check out Visible Light Channel (takes about 18 hrs)

3.7.1

     58 & 06:00 # Roll FOV to QUIET REGION  and point to sun center # (shared)

3.7.2

     59 & 00:00 # Enter Ops mode # SS Interrupt enabled but not triggered (ded)

     59 & 00:15 # Position mirror mechanism # at 5.0 solar radii (Rsun) (ded.)
 
     59 & 00:30 # Configure Visible Light Detector (VLD) # HV ON (ded.)

     59 & 01:15 # Move mirror to lower heights # not below 2.5 Rsun (ded.)

     59 & 01:30 # Take VLD exposures # check the polarized signal (ded.)

     59 & 05:30 # Switch OFF PMT HV and power # (dedicated)

SVM activities

     60 & 00:00 # Stand by for possible HGA out of FOV #

     61 & 00:00 # Start S/C subsystem tests # No exp. except point test
  
     
BLOCK3.8 -- Observations and Stray Light Measurements with Mirror Unlocked (3 days)

3.8.1

     82 & 00:00 # Roll FOV to CORONAL HOLE # sun center pointing (ded.)  

     82 & 00:45 # Position mirror at 5.0 Rsun # UVCS in Ops mode 

     82 & 01:00 # Move pointing mechanism # to X0=+0.5 Rsun 
;                                         # (i.e., over-occult such that lower
;                                         # FOV edge is at 1.7 Rsun in corona)
;                                         # Sun Sensor interrupt disabled

     82 & 02:00 # Configure LYA, OVI, and VL detectors for observations # (ded)

     82 & 04:00 # Acquire image(s) in LYA, OVI and VL channels # (shared)

     82 & 05:00 # Move mirror to different heights # monitor LYA, OVI and VL.
;                                                  # Verify det's rates when 
;                                                  # mirror position is 2.5 - 5
;                                                  # Rsun (i.e., 3 - 5.5 Rsun)

;    Note: internal occulter is still locked at 2.7 solar radii (TBC),
;          so expect higher straylight level for mirror positions below 2.5
;          solar radii due to diffraction from external occulter.

     82 & 05:15 # Start obs with mirror at various positions (2.5 - 5. Rsun) #

3.8.2.& 3.8.3

; Similar observations, for different pointing position, will
; be carried out in the following 2 days (commanding: shared)

; In more detail: 
 
;  1) Position mirror mechanism at 5.0 solar radii.
;  2) Move pointing mechanism to X0 = +0.3, +0.2, +0.1, 0.0 (sun ctr.) Rsun,
;     each time acquiring images and moving the mirror position
;     (cfr. actions on this day, from 12:00 hr) 
;  3) Repeat the above observation sequence for QUIET REGION and STREAMER

     
BLOCK3.9 -- Deploy Gratings (takes 4 hrs)

     83 & 00:00 # enter Pre-ops mode # (dedicated)
     
     83 & 00:05 # Fully open door # (dedicated) 
     
     83 & 00:15 # Unlock LYA and OVI grating # switch-off heaters TBD (ded.)

     83 & 00:30 # Check LYA and OVI grating mechanisms # move to various pos.
;                                                      # update onboard Grating
;                                                      # Param. table (GRTNGT)

BLOCK3.10 -- Preliminary Observations with Grating Unlocked (takes 2 days) 

3.10.1

     83 & 02:00 # Roll FOV to QUIET REGION # enter Operations mode (ded.)
;                                          # Verify SS Interrupt is enabled
;                                          # but not triggered

     83 & 02:30 # Position mirror at 3.5 Rsun #

     83 & 03:30 # Configure LYA detector for observation # HV ON (dedicated)

     83 & 04:30 # Acquire coronal spectrum in LYA ch. # various grat. positions
;                                                     # Check focus and align.

     83 & 05:30 # Monitor wavelength stability # (shared)

     83 & 06:00 # Configure OVI detector for observation # HV ON (dedicated)

     83 & 06:30 # Acquire coronal spectrum in OVI ch. # various grat. positions
;                                                     # including "redundant" 
:                                                     # LYA OFF and ON the det.
;                                                     # Check focus and align.

     83 & 07:30 # Monitor wavelength stability # (shared)

     83 & 08:00 # Start running stored sequence for grating scan # 

3.10.2

     84 & 00:00 # Configure VL detector for observation # HV ON (dedicated)

     84 & 00:30 # Acquire images in VL channel # for various pol. positions 

     84 & 01:30 # Repeat obs. above for different heights # 3 and 2.5 Rsun

     84 & 08:00 # Switch OFF VLD Power and HV #

BLOCK3.11 -- Preliminary Flat Field Calibration (takes 4 days)

3.11.1

     85 & 00:00 # Move pointing mech. @ +0.3 Rsun # SS interrupt disabled (ded.)

3.11.2

     85 & 00:30 # Start flat field calibrations # (shared)
 
; 1) Position mirror to lower heights such that slits receive 
;    diffracted light from external occulter. 
;    Verify LYA, and OVI event rate is acceptable 
;    for flat field calibration.
;              Note: internal occulter is still locked at 2.5 solar 
;                    radii (TBC), so expect higher straylight level for 
;                    mirror positions below 2.5 solar radii due to diffration 
;                    from external occulter.
;
; 2) Move spectral lines across detectors using grating 
;    motion. Step size is half the profile width.
;    Take LYA and OVI exposures after each grating step:
;    1 % statistics for areas scanned by Ly-alpha line,
;    2 % statistics for a small area (about 10 Ang.) 
;    scanned by O VI 1032/1037 lines.
;             Note: Slit mechanisms still in launch configuration

3.11.3 & 3.11.4 & 3.11.5 

     88 & 07:15 # Move pointing to sun center #

3.11.6

     88 & 08:00 # End flat field calibrations # 

BLOCK3.12 -- Deploy Internal Occulter Mechanism (1 day)

3.12.1

     89 & 00:00 # Unlock Internal Occulter # (dedicated)

3.12.2

     89 & 00:15 # Checkout Internal Occulter # (ded./shared)

     89 & 04:00 # Checkout Occulter motion vs. Mirror motion # (ded./shared)

     89 & 08:00 # End Checkout Occulter # 

BLOCK3.13 -- Preliminary Observations with Mirror and Occulter Unlocked (10 days)

3.13.1

     90 & 00:00 # Roll FOV to CORONAL HOLE #

     90 & 00:30 # Enter Ops mode # SS Interrupt enabled but not triggered

     90 & 00:35 # Position mirror/occulter mechanisms # @ 5.0 Rsun (ded.)

     90 & 00:45 # Move pointing mechanism # to X0 = +0.5 Rsun 
;                                         # (i.e., over-occult such that 
;                                         # lower edge of FOV is at 
;                                         # 1.5 Rsun radii in corona)
;                                         # SS interrupt disabled
		
     90 & 01:00 # Configure LYA, OVI, VL detectors for observations # (ded.)

     90 & 01:30 # Acquire image(s) in LYA, OVI, and VL channels #

     90 & 02:30 # Obs. with mirror/occulter @ different  heights # 1.5 - 5 Rsun

3.13.2

     91 & 00:00 # Start first official UVCS series of observations # 

;   NOTE: This day is the start of UVCS Synoptic Observations. It is 
;         expected to produce the first UVCS science data including
;         a false color image suitable for a press release.  
     
;   1) Position mirror/occulter mechanisms at 5.0 solar radii.
;   2) Move pointing mechanism to X0 = +0.3, +0.2, +0.1, 0.0 (sun center) Rsun,
;      each time repeating the observation sequence of the previous day  
;   3) Repeat obs. of the two previous days for QUIET REGION and STREAMER 

     91 & 16:00 # Continue observation in progress #

     91 & 17:24 # Roll to Position angle 00 (PA=0), (18 min.) # (dedicated) 
 LR_CH           Large Radii

     91 & 17:42 # Switch ON HV in LYA, OVI, and VL detectors # (dedicated)

     91 & 17:43 # Start Observation "1", SYNOPTIC NP, (49 min.) # (shared)

     91 & 18:32 # Roll to target in North hemisphere (10 min.) # (dedicated)

     91 & 18:42 # Start Observation "2", (240 min.) #  

     91 & 22:42 # Roll to PA = -72 (18 min.) # (dedicated) 

     91 & 23:00 # Start Observation "3", SYNOPTIC  (30 min.) # (shared)
   
     91 & 23:30 # Roll to PA = -36 (4 min.) # (dedicated)

     91 & 23:34 # Continue Observation "3", SYNOPTIC WL (30 min.) # (shared)

3.13.3
   
     92 & 00:04 # Roll to PA = 36 (8 min.) # (dedicated)

     92 & 00:12 # Continue Observation "3", SYNOPTIC (30 min.) # (shared)
   
     92 & 00:42 # Roll to PA = 72 (4 min.) # (dedicated)
 
     92 & 00:46 # Continue Observation "3", SYNOPTIC  (30 min.) # (shared) 
   
     92 & 01:16 # Roll to PA = 108  (4 min.) # (dedicated)
 
     92 & 01:20 # Continue Observation "3", SYNOPTIC (30 min.) # (shared) 
     
     92 & 01:50 # Roll to PA = 144 (4 min.) # (dedicated)
 
     92 & 01:54 # Continue Observation "3", SYNOPTIC (30 min.) # (shared) 
 
     92 & 02:24 # Roll to PA = 216 (8 min.) # (dedicated)

     92 & 02:32 # Continue Observation "3" SYNOPTIC (30 min.) # (shared)
 
     92 & 03:02 # Roll to PA = 252 (4 min.) # (dedicated)
 
     92 & 03:06 # Continue Observation "3", SYNOPTIC (30 min.) # (shared)
 
     92 & 03:36 # Roll to position for JOP (36 min.) # (dedicated)
 
     92 & 04:12 # Start Observation "4", JOP (210 min.) # (shared)
 
     92 & 07:42 # Roll to South hemisphere target (18 min.) # (dedicated) 
 
     92 & 08:00 # Start Observation "5" (240 min) # 
 
     92 & 12:00 # Roll to PA = 180 (18 min.) # (dedicated)
 
     92 & 12:18 # Start Observation "6", SYNOPTIC SP (50 min.) # (shared)
 
     92 & 13:08 # Roll to new target (10 min.) # (dedicated)

     92 & 13:18 # Start Observation "7" (240 min.) #

     92 & 13:59 # Continue Observation "7" #

     92 & 17:24 # Roll to PA = 0.0, Repeat day 92 (22hrs, 36 min) # (ded/shar)

     92 & 17:24 # Roll to PA = 0.0, Repeat day 92 (22hrs, 36 min) # (ded/shar)

3.13.4 
   
     93 & 03:36 # Switch OFF HV in LYA, OVI, and VL detectors # (dedicated)

     93 & 03:37 # Switch OFF LYA, OVI, and VL detector HV # enter Pre-Ops mode.

BLOCK3.14 -- Check out Slits, Filters (takes 4 hours)
	
     93 & 03:40 # Checkout LYA and OVI slit mechanism # (shared)
 
     93 & 06:40 # Checkout LYA, OVI, and VL filter mechanism # (shared)

     93 & 07:40 # Enter ops mode # (dedicated)

     93 & 07:42 # Roll to South hemisphere target (18 min,) # (dedicated)

     93 & 07:55 # Configure LYA, OVI, and VL detectors # (dedicated)     

     93 & 08:00 # Continue standard observation, see day 92 # (shared) 

BLOCK3.15 -- Second Flat Field Calibration (takes 2 days)

; Notes:
;         1) Continue preliminary observation with MOM mech locked.
;         
;         2) Flat field only causes detetecteor areas within masks to be
;            used for follow TBD period (about 2 week) 

;****

3.15.1

     93 & 17:24 # Start flat field calib. # as in 12) (ded.)
;                                         # Slits @ 300 um

3.15.2

     95 & 16:00 # End flat field calibrations # 

BLOCK3.16 -- Checkout Pre-defined sequences (takes 3 days)

;    # Start checkout of pre-defined sequences during observation "4" # (ded.)
;    # Check also STOL procedures available in the SMOCC, 
;    # using remote command requests (RCRs) and remote
;    # procedure requests (RPRs)

3.16.1

     96 & 01:24 # Roll to PA = 0.0, Repeat Day 87, (22hrs,36 min) # (ded/shar)

3.16.2

     97 & 01:24 # Roll to PA = 0.0, Repeat Day 87, (22hrs,36 mim) # (ded/shar)

3.16.3

     98 & 01:24 # Roll to PA = 0.0, Repeat Day 87, (22hrs,36 min) # (ded/shar)

3.16.4 
     
     99 & 01:24 # Roll to PA = 0.0, Repeat Day 87, (22hrs,36 min) # (ded/shar)

;    99 & 16:00 # End checkout of pre-defined sequences # (ded.)