Voyager Mission Operations Status Report #1215 — 9-15 Feb 2002

COMMAND TRANSMISSION & VERIFICATION OPERATIONS

Voyager 1 command operations consisted of the uplink of a command loss timer reset on 02/12 [DOY 043/1600z]. The spacecraft received the command.

Voyager 2 command operations consisted of the uplink of seven bracketed command loss timer resets sent on five-minute centers using 0.5 Hz steps on 02/12 [DOY 043/2247z]. The spacecraft received four of the seven commands sent.

SEQUENCE GENERATION OPERATIONS

No sequence development activity during this report period.

DATA RETURN OPERATIONS

Voyager 1 Data Processing and Operations:

There were 98.5 hours of DSN scheduled support for Voyager 1 of which 26.5 hours were large aperture coverage. There were no real-time or schedule support changes or significant outages during the period.

Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. The AHELI1 cyclic for recording additional GS-4 data was enabled on November 17, 2001. One frame of GS-4 data from this cyclic was recorded on February 8. The EDR backlog is 3 days.

Voyager 2 Data Processing and Operations:

There were 64.6 hours of DSN scheduled support for Voyager 2 of which 19.7 hours were large aperture coverage. There were no real-time or schedule support changes or significant outages during the period.

Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. The EDR backlog is 4 days.

FLIGHT SYSTEM PERFORMANCE

Voyager 1 performance was nominal during this report period.

Voyager 2 performance was nominal during this report period.

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 2/15/02