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

Status Report From: Jet Propulsion Laboratory
Posted: Thursday, March 14, 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.

Spacecraft

Consumption
One Week (Gm)

Propellant
Remaining (Kg)

Output
(Watts)

Margin
(Watts)

31

10.70

30.97

309.7

28

32

8.27

32.85

311.3

57

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

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

12,540,000,000

9,925,000,000

Distance from the Sun (Mi)

7,792,000,000

6,167,000,000

Distance from the Earth (Km)

12,573,000,000

10,028,000,000

Distance from the Earth (Mi)

7,813,000,000

6,231,000,000

Total Distance Traveled Since
Launch (Km)

14,358,000,000

13,475,000,000

Total Distance Traveled Since
Launch (Mi)

8,921,000,000

8,373,000,000

Velocity Relative to Sun
(Km/sec)

17.234

15.725

Velocity Relative to Sun
(Mi/hr)

38,551

35,176

Velocity Relative to Earth
(Km/sec)

20.971

28.575

Velocity Relative to Earth
(Mi/hr)

46,909

63,920

Round Trip Light Time
(Hours:Minutes:Seconds)

23:17:52

18:34:54

// end //

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