Voyager Mission Operations Status Report # 2013-12-6  Week Ending  December 6, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 12/05 [DOY 339/1610z].  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 1.0 Hz steps on 12/03 [DOY 337/1322z].  The spacecraft received one of the seven commands sent.

 

Sequence Generation Operations

 

Continue sequence development of CCSL A090.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 42.6 hours of DSN scheduled support for Voyager 1 of which 40.8 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 1.5 hours on 12/01 [DOY 335] due to sub reflector problems at DSS-14 [DR G114469].

 

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 1.  The third frame of GS-4 data was recorded on December 5.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 35.8 hours of DSN scheduled support for Voyager 2 of which 28.8 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 X-Band high power, AACS/FDS/CCS full memory readout in EH-1200 (1200 bps), and X-Band low power on 12/2 (DOY 336).  Also, a PMPCAL was performed on 12/4 (DOY 338).

 

Voyager 2 performance was nominal during this report period.  Activity included switching to Gyros B&C on 12/5 (DOY 339).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.11

19.59

259.1

20

2

5.08

25.96

260.3

16

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,886,000,000

15,476,000,000

Distance from the Sun (Mi)

11,735,000,000

9,616,000,000

Distance from the Earth (Km)

19,007,000,000

15,574,000,000

Distance from the Earth (Mi)

11,810,000,000

9,677,000,000

Total Distance Traveled Since Launch (Km)

25,763,000,000

24,694,000,000

Total Distance Traveled Since Launch (Mi)

16,009,000,000

15,344,000,000

Velocity Relative to Sun  (Km/sec)

17.035

15.421

Velocity Relative to Sun  (Mi/hr)

38,107

34,495

Velocity Relative to Earth  (Km/sec)

36.158

39.426

Velocity Relative to Earth  (Mi/hr)

80,882

88,193

Round Trip Light Time (hh:mm:ss)

35:12:20

28:51:38