; This file contains the SPACECRAFT CRUISE PHASE TIME-LINE.
 
; Time-line has the required format: TIME # ACTION # COMMENT
; Time has the format: ddd & hh:mm:ss, or ddd, or ddd & hh, or ddd & hh:mm
 
; The purpose of this is to make the file machine readable for input to
; the SOHO timeline IDL program
 
; Blank lines and comment lines -- preceeded by ";" -- are ignored
 
 
      0 & 00:00 # Launch # For detailed LEOP timeline, see Flight Operations Plan
 
      0 & 00:10 # Centaur main engine cutoff # Beginning of parking orbit
 
      0 & 00:18 # Second Centaur main engine start # Launch into transfer trajectory, assuming short duration (00:08) parking orbit. Long duration may be up to 1:38
 
      0 & 00:20 # Second Centaur main engine cutoff # Start of transfer trajectory (MECO2)
 
      0 & 00:55 # Centaur/SOHO separation # First acquisition of signal by DSN
 
   0 & 00:55:05 # Automatic Initial Sun Acquisition # Monitored from ground
 
   0 & 01:01:00 # Solar array deployment # Assuming nominal sun acquisition
 
   0 & 01:10:00 # Beginning of ground control activities # Nominal 15 minutes after separation
 
   0 & 01:10:01 # Thermal control activation # Critical support for 30:00 minutes more required

   0 & 02:00    # Thermal Check PTCS # SSP1: several hours, OFF-LINE 
 
   0 & 03:03:00 # Start star mappings and roll maneuvers # Takes 8 to 12 hours
 
   1 & 12:00:00 # First orbit correction maneuver (MCC1) # S/C in orbital maneuver mode

   1 & 13:15    # Single Event Upset Survey # SSD12: 15 minutes, to be repeated daily (continuously?)

   1 & 13:55    # Fuel Budget Verification # S4: 2 hours, OFF-LINE

   1 & 14:00    # Power Subsystem Good Health Check # SSE1: 1 hour

   1 & 16:00    # AOCS Subsystem Good Health Test # SSA11: 1 hour
   
   1 & 18:00    # Data Handling Subsystem Good Health Test # SSD9: 1 hour
   
   1 & 20:00    # Antenna Subsystem Good Health Test # SSR3: 1 hour

   1 & 22:00    # Dump Programmable Part of S/W Package # SSD1: 8 hours
   
   2 & 14:00    # Transition from TR1 to SSR # SSD7: 1 hour

   2 & 16:00    # Single Event Upset Survey # SSD12: 15 minutes, daily, won't be repeated after this  
   
   2 & 16:30    # HGA Centering # SSR1: 2 hours

   2 & 20:30    # Fourth Reaction Wheel Functional Test # SSA9: 2 hours

   3 & 00:00:00 # Begin G/S nominal daily support #

   3 & 00:10    # Thermal Prediction Check # SSS1: 24 hours no movements + 4 hours measurements, use SSR, OFF-LINE

   4 & 00:00:00 # S/C nominal transfer mode and ranging mode # Science data acquisition possible
   
   4 & 00:10    # Measurements for Thermal Prediction Check # SSS1: second part, OFF-LINE

   4 & 06:00    # Thermal Transient on Tape Recorder # SSS2: 24 hours of nominal TR1 use, check temperature, OFF-LINE 

   8 & 00:00    # On Board Time Stability # SSD10: 0.1 hours (?), non-interference, repeat at each OBT adjustment   

  
  18 & 00:00    # Drift and Scale Factor of Gyros # SSA2 6 hours and 12 hours, no interference

  19 & 00:00    # External Disturbing Torques Calibration # S5: ?? hours, OFF-LINE

  20 & 00:00:00 # Second midcourse correction maneuver (MCC2) # S/C in orbital maneuver mode, orbit correction + wheels off-loading
 
  20 & 04:00    # Thermal Transient on Reaction Wheel # SSS3: 2 hours, DURING momentum dump (present timing tentative), no interference 

  20 & 06:00    # Thermal Transient Due to Antenna Pointing Mechanism # SSS4: 2 hours, DURING roll maneuver, (present timing tentative), no interference

  21 & 00:00    # Fuel Budget Verification # S4: 2 hours, OFF-LINE

  21 & 00:10    # Fourth Reaction Wheel Functional Test # SSA9: 2 hours

  21 & 04:00    # Use of Redundant Applied S/W for Telecommand Coding # SSD8: ?? hours (CHECK)

  22 & 00:00    # Verification of AOCS Telemetry Type M3.1 # SSA1: 4 hours (extended memory dump)

  22 & 08:00:00 # Nominal transfer orbit mode # 

  23 & 00:00    # Verification of Bit Error Rate SSR and TR1 # SSD11: 16 hours (need 16 hours DSN support), no interference
  
 
     60 & 00:00 # Possible excursion out of HGA FOV (32 degrees) # Switch to LGA, P/L standby
     
     61 & 00:00 # Test of Radio Frequency Budget with LGA # S2: 1 hour, P/L standby

     61 & 02:00 # Test of HGA Depointing # SSR2: 2 hours (?), both high and medium TM  
     
     62 & 00:00 # Test of Radio Frequency Budget with HGA # S3: (duration? science TM on?), First TM high rate, then medium rate

     63 & 00:00 # Check Modulation Index # SSR4: (duration? science TM on?)

     64 & 00:00 # Check Uplink Performance # SSR5: (duration? science TM on?)

     65 & 00:00 # Payload Module Thermal Control Subsystem Calibration # SSP3: 6 days. Experiments avoid thermal disturbances, provide sun pointing

     71 & 00:00 # Correlation of SSU and FPSS along Pitch Axis # SSA4: duration?. No experiment motion

     72 & 00:00 # SSU Calibration # SSA3: duration? Includes maneuvers
   
     73 & 00:00 # Drift and Scale Factors of Gyros # SSA2: 6 hours + 12 hours, interference with exps?

     75 & 00:00 # External Disturbing Torques Calibration # S5: ?? hours, OFF-LINE
 
     76 & 00:00 # Off-loading of reaction wheels # LGA, P/L standby

     76 & 00:00 # Thermal Transient on Reaction Wheel # SSS3: 2 hours, DURING momentum dump, no interference
 
     76 & 04:00 # Fuel Budget Verification # S4: 2 hours, OFF-LINE

     76 & 04:10 # Power Budget Verification # S1: 1 week, OFF-LINE

     77 & 00:00 # Calibration of Solar Acquisition Sensor # SSA5: 4 hours. No experiment motion

     78 & 00:00 # Comparison between FPSS A and B # SSA7: 4 hours. No experiment motion, low wheel speed

     79 & 00:00 # Comparison between SSU A and B Alignment # SSA8: 4 hours. After gyro calibration

     80 & 00:00 # Pointing Stability outside Experiment Motion # S8: ?? hours. No movement of experiment mechanism. Pointing measurements by pointing experiments

     81 & 00:00 # Pointing Stability during Experiment Motion # S9: ?? hours. Pointing measurements experiment by experiment. No TR or HGA motion

    114 & 00:00 # External Disturbing Torques Calibration # S5: ?? hours, OFF-LINE

    115 & 00:00 # Halo Orbit Insertion maneuver # Orbital maneuver mode

    115 & 00:00 # Thermal Transient on Reaction Wheel # SSS3: 2 hours, DURING momentum dump (present timing tentative), no interference 

    115 & 02:00 # Thermal Transient Due to Antenna Pointing Mechanism # SSS4: 2 hours, DURING roll maneuver, (present timing tentative), no interference

    116 & 00:00 # Verification of AOCS Type 3.3 # SSA1: 4 hours

    117 & 00:00 # Thruster Efficiency Calibration # SSA10: 2 hours

    119 & 08:00 # Halo Orbit  # Nominal transfer orbit mode

    120 & 00:00 # Power Subsystem Good Health Check # SSE1: 1 hour

    120 & 00:10 # Fuel Budget Verification # S4: 2 hours, OFF-LINE

    120 & 02:00 # AOCS Subsystem Good Health Test # SSA11: 1 hour
   
    120 & 04:00 # Data Handling Subsystem Good Health Test # SSD9: 1 hour
   
    120 & 06:00 # Antenna Subsystem Good Health Test # SSR3: 1 hour

    121 & 00:00 # Verification of AOCS Type 3.1 # SSA1: 4 hours

    121 & 00:10 # Power Budget Verification # S1: 1 week, OFF-LINE

    122 & 00:00 # Fourth Reaction Wheel Functional Test # SSA9: 2 hours

    122 & 04:00 # Min/Max Monitoring Test # SSD2: 1 hour (only if not used in TTP)
    
    122 & 06:00 # Standard Monitoring Function Test # SSD3: 1 hour (only if not used in TTP)

    123 & 00:00 # Macro Command Function Test # SSD4: 1 hour (only if not used in TTP)

    123 & 02:00 # Command List Function Test # SSD5: 1 hour (only if not used in TTP)

    124 & 00:00 # Verification of Absolute Pointing Requirements # S6: 8 hours (including SSA6). Procedure TBD by experimenters

    125 & 00:00 # Fine Pointing Sun Sensor Offsetting # SSA6: 8 hours (including S6). Measured by experiments

    128 & 00:00 # Calibration of Payload Module Thermal Control System # SSP2: 17 days.  Experiments to avoid thermal disturbances.

    144 & 23:55 # End of PTCS

    146 & 00:00 # Beginning of "First Month of SOHO Science" # 30 days, science highest priority after safety. Collection of PR material

; End of file