FLIGHT
SOL 33 END-OF-DAY DOWNLINK STATUS REPORT

Last updated: 13 Aug 1997, 20:35 PDT, Data Controller: Howard J. Eisen

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


Rover deep tracks in Mermaid dune


Looking at back side of Ender, Wedge at Left
See the 'JPL' on the side of the Lander?



SUMMARY REPORT

Retransmit Status:

Sequence 53210B: Sequence 53310B: Time reporting problem

RETRANSMIT REQUESTS




SEQUENCE PLANNING RECOMMENDATIONS
Continue with nominal sequence plan. Operational Constraints (Sol 35 Sequence):
  1. New or changed recommendations:
    • Change alarm clock wakeup to 8:30 LTST to allow for clock drift.
    • Remember to wait for S0050.
    • Why no MAE in runout?
  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
  3. Leave X accelerometer ENABLED
  4. Leave the Z accel DISABLED
  5. 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. Enable hazard avoidance using sensors, contacts, and laser proximity, and perform each waypoint command only once
  2. If possible, health checks should not be skipped as a result of traversable hazards
  3. Mask all errors (except INVALID CMD) immediately prior to "Read Mem" of persistent state table. Unmask accordingly immediately afterwards.
  4. Set Modem Reheat to 5 minutes and maximum modem reheat temperature 30 deg.
  5. 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.
  6. Terminate heating at 15:00
  7. Disable auto shutdown
  8. Set Modem Heat to 15 minutes; 10 minutes if following a night-time APXS
  9. Set alarm based wakeup to 08:10 LST
  10. Perform Read Memory just before last downlink session
  11. DISABLE RF Wheel Temperature Sensor
  12. DISABLE Z accelerometer.
  13. Perform Time Sync just prior to EOD shudown.
  14. Always command a Level 2 Health Check before shutdown.
  15. Perform level 2 health check at the end of every traverse command
  16. Limit image transfer after 1:00 LST (to prevent overheating)
  17. Limit each "Move Command" distance to 1 meter or less to enable gyro to be recalibrated and thereby reduce the amount of drift.
  18. Insert longer wait (10 seconds) between APXS cycle start command and APXS turn-off command (turn off devices)
  19. 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.
  20. Use Web_Heat_B parameter with Max temp of 30C.
  21. 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: 0, Following 33095, Auto Health Check SCET: 8/7/97 00:26:43 )

BATTERY STATE/USAGE**

SUBSYSTEM STATUS:



TRAVERSE HAZARDS (DETECTED)



TELEMETRY VOLUME



SUBSYSTEM REPORTS

NAVIGATION PERFORMANCE:

CONSTRAINTS:

  • Clear all errors at the beginning of the sequence.
  • Declare left, right bogeys and differential to DEVICE_BAD.
  • Move the vehicle to a safer position based on IMP images.
  • Clear all errors again.
  • Declare left, right bogeys and differential back to DEVICE_OK, then continue normal driving.
  • Do health check level 2 after every vehicle movement.
  • Set Z accel to FORCED_BAD for all vehicle movements.
  • Set Y accel to FORCED_BAD for RISK LEVEL = 1 vehicle movements.
  • Set Y accel to OK for RISK LEVEL = 2 vehicle movements.
  • IF navigation sensor outside limit bit is set to ENABLE in HAZ_AVOIDANCE parameter (to avoid navigation command errored out because of Y accel exceeds navigation limit), the following considerations should be taken in to account:
  • * set command TIME OUT longer to allow the vehicle finishes up the command.
  • * check for clearance behind the vehicle at starting position, the vehicle might back up half of the vehicle length (300mm) if hazard avoidance somehow triggers just right after the navigation command starts.

    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.