Voyager Mission Operations Status Report # 2013-12-20  Week Ending  December 20, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 12/16 [DOY 350/1655z].  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 12/19 [DOY 353/1202z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

Start sequence development of CCSL B163.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 44.5 hours of DSN scheduled support for Voyager 1 of which 44.5 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.  One frame of GS-4 data was recorded this week.  A second frame of GS-4 data was recorded on December 15.  The third frame of GS-4 data was recorded on December 19.  The EDR backlog is 1 day.

 

Voyager 2 Data Processing and Operations:

 

There were 47.5 hours of DSN scheduled support for Voyager 2 of which 31.7 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.

 

Voyager 2 performance was nominal during this report period.  Activity included AACS/FDS/CCs memory readouts in EL-40 (40 bps) on 12/17 (DOY 351).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

4.72

19.58

258.9

22.8

2

54.98*

25.90

260.1

30.8

                                                          *MAGROL 2013-347

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,906,000,000

15,494,000,000

Distance from the Sun (Mi)

11,747,000,000

9,627,000,000

Distance from the Earth (Km)

19,024,000,000

15,607,000,000

Distance from the Earth (Mi)

11,821,000,000

9,697,000,000

Total Distance Traveled Since Launch (Km)

25,805,000,000

24,741,000,000

Total Distance Traveled Since Launch (Mi)

16,035,000,000

15,373,000,000

Velocity Relative to Sun  (Km/sec)

17.035

15.420

Velocity Relative to Sun  (Mi/hr)

38,107

34,494

Velocity Relative to Earth  (Km/sec)

33.236

37.789

Velocity Relative to Earth  (Mi/hr)

74,346

84,531

Round Trip Light Time (hh:mm:ss)

35:14:14

28:55:12