Voyager Mission Operations Status Report # 2011-11-04, Week Ending November 4, 2011

 

Command Transmission & Verification Operations

 

There were no command operations in support of Voyager 1 during the period.

 

Voyager 2 command operations consisted of the uplink of a Command Loss Timer Reset and CCSL B154A on 11/04 [DOY 308/1050z].  The spacecraft received all commands sent and the CCSL was verified.

 

Sequence Generation Operations

 

Began sequence development of CCSL B154B.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 45.4 hours of DSN scheduled support for Voyager 1 of which 45.4 hours were large aperture coverage. There was one real-time support change on 10/03 [DOY 303] when DSS-25 supported 1.4 hours in place of DSS-14 down due to a Red Antenna [DR G112088].  The total actual support for the period was 45.4 hours of which 44.0 hours were large aperture coverage.

 

There was one significant outage of 5.1 hours on 10/03 [DOY 303] due to a Red Antenna at DSS-14 [DR G112088].

 

Science instrument performance was nominal for all activities during this period.  One frame of GS-4 data was recorded this week.  A second frame of GS-4 data was recorded on November 1.  The EDR backlog is 3 days.

 

Voyager 2 Data Processing and Operations:

 

There were 37.1 hours of DSN scheduled support for Voyager 2 of which 22.1 hours were large aperture coverage.  There were no real-time or schedule support changes made or significant outages during the period.

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 2 days.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.   Activities included 1 LECP observation on 1/29 (DOY 302), 2 LECP observations on 10/30 (DOY 303), 1 LECP observation on 10/31 (DOY 305), an ASCAL on 11/1 (DOY 305), and 1 LECP observation on 11/2 (DOY 306), and 11/3 (DOY 307).

 

Voyager 2 performance was nominal during this report period.

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

263.12*

24.10

267.7

10

2

4.66

27.08

268.9

28

                                                            *1 ASCAL and 5 LECP Observations

 

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF THIS REPORT

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

17,767,000,000

14,488,000,000

Distance from the Sun (Mi)

11,040,000,000

9,002,000,000

Distance from the Earth (Km)

17,869,000,000

14,534,000,000

Distance from the Earth (Mi)

11,103,00,000

9,031,000,000

Total Distance Traveled Since Launch (Km)

23,563,000,000

22,507,000,000

Total Distance Traveled Since Launch (Mi)

14,641,000,000

13,985,000,000

Velocity Relative to Sun  (Km/sec)

17.051

15.656

Velocity Relative to Sun  (Mi/hr)

38,141

34,566

Velocity Relative to Earth  (Km/sec)

41.497

41.656

Velocity Relative to Earth  (Mi/hr)

92,825

93,182

Round Trip Light Time (hh:mm:ss)

33:05:56

26:56:02