FLIGHT
SOL 35 END-OF-DAY DOWNLINK STATUS REPORT

Last updated: 8 Aug 1997, 22:00 PDT, Data Controller: Henry W. Stone

Summary Report
Retransmit Requests
Sequence Planning Recommendations & Constraints
Sequence Execution Status
Telemetry Volume
Traverse Hazards (Detected)
Subsystem Reports
Telemetry Processing Anomalies
Press Release


Sojourner next to "WEDGE"


Wedge up close and personal



SUMMARY REPORT

Retransmit Status:

Sequence 53310B: Sequence 53510B:

RETRANSMIT REQUESTS




SEQUENCE PLANNING RECOMMENDATIONS
Modify nominal sequence plan. Recommend APXSing WEDGE ...we are in a perfect position for it ... get it while we are here.

Operational Constraints (Sol 36 Sequence):

  1. New or changed recommendations:
    • Limit Move command distances to 0.5 meters so that gyro is recalibrated more frequently ... hopefully resulting in less drift.
    • Set modem Heat and Reheat parameters both to "0" prior to shutting down for the night if LMRE is NOT going to be turned on prior to expected rover solar wakeup of ~7:15 LST. Reset them back to 15 minutes and 5 minutes, respectively, on the next Sol late enough in the morning to virtually guarantee that the LMRE is ON.
    • Change alarm clock wakeup to 8:00 LTST to allow for clock drift.
  2. Accelerometers
    • DISABLE the Y accelerometer during waypoints and moves at risk level 1
    • CAN DISABLE the Y accelerometer during moves at risk level 2 IF planned path appears 'safe'; otherwise ENABLE Y accelerometer.
    • ENABLE Y accel for waypoints at risk level 2
    • Leave X accelerometer ENABLED
    • Leave the Z accel DISABLED
  3. Before beginning traverses, should back up a little (~ 10 cm) to enable lasers to detect hazards which may be very close to the front of the rover. UNMASK contact sensors for this move. May want to then move forward ~ 1 cm, with contact sensors MASKED to remove any contact that may have been made during the previous backward move. Then UNMASK all contact sensors and plan subsequent waypoints.
Engineering Requests:
  1. Waypoint Navigation:
    • Continue to perform waypoint commands.
    • Take seperate S0055 images after each individual waypoint command.
    • Take S0050 (Rover Movie) of each individual waypoint command.
  2. Take pre and post S0050 images at Low-Compression (3:1).
  3. (DESIRE) Take rover images as early in the morning as possible to reduce dark noise current.
  4. (DESIRE) Leave rover on until 15:45 LST to collect late afternoon thermal data, perform health check just before shutdown.
  5. (DESIRE) Perform Wheelie before start of Traverse and Soil Experiment at end of Sol's traverse when practical
Operational Constraints (General):
  1. Limit Move command distances to 0.5 meters so that gyro is recalibrated more frequently ... hopefully resulting in less drift.
  2. Enable hazard avoidance using sensors, contacts, and laser proximity, and perform each waypoint command only once.
  3. If possible, health checks should not be skipped as a result of traversable hazards.
  4. Mask all errors (except INVALID CMD) immediately prior to "Read Mem" of persistent state table. Unmask accordingly immediately afterwards.
  5. Set Modem Reheat to 5 minutes and maximum modem reheat temperature 30 deg.
  6. If need to perform Level 3 health checks between Sol n, 20:00 LST and Sol n+1,8:00 LST, disable lasers (i.e., never power) to prevent them from being turned on. Re-enable afterwards.
  7. Terminate heating at 15:00
  8. Disable auto shutdown
  9. Set Modem Heat to 15 minutes; 10 minutes if following a night-time APXS
  10. Set alarm based wakeup to 08:10 LST
  11. Perform Read Memory just before last downlink session
  12. DISABLE RF Wheel Temperature Sensor
  13. DISABLE Z accelerometer.
  14. Perform Time Sync just prior to EOD shudown.
  15. Always command a Level 2 Health Check before shutdown.
  16. Perform level 2 health check at the end of every traverse command
  17. Limit image transfer after 1:00 LST (to prevent overheating)
  18. Limit each "Move Command" distance to 0.5 meter or less to enable gyro to be recalibrated and thereby reduce the amount of drift.
  19. Insert longer wait (10 seconds) between APXS cycle start command and APXS turn-off command (turn off devices)
  20. Perform WEB heating on days of low activity (i.e. no traverses) with no night-time APXS operations, and Runouts from 13:00 (noon) to 15:00 MLST.
  21. Use Web_Heat_B parameter with Max temp of 30C.
  22. Future soil mechanics experiments in suspected hard material should have 6 spins of 500 counts rather than 4.


SEQUENCE EXECUTION STATUS & VEHICLE STATE

SEQUENCE EXECUTION STATUS:

VEHICLE STATE: (AS OF COMMAND: 35159, Health Check SCET: 8/9/97 03:04:42 )

BATTERY STATE/USAGE**

SUBSYSTEM STATUS:



TRAVERSE HAZARDS (DETECTED)



TELEMETRY VOLUME



SUBSYSTEM REPORTS

NAVIGATION PERFORMANCE:

THERMAL PERFORMANCE:

TELECOM PERFORMANCE

MOBILITY PERFORMANCE:

POWER PERFORMANCE:



TELEMETRY PROCESSING ANOMALIES


PRESS RELEASE

TBD

Web Page Authors: Henry W. Stone and Allen.R.Sirota

All information on this site, including text and images describing the Rover is copyright © 1997, Jet Propulsion Laboratory, California Institute of Technology and the National Aeronautics and Space Administration.