Voyager Mission Operations Status Report # 2013-08-09  Week Ending  August 9, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 08/03 [DOY 215/0935z].  In addition a Command Loss Timer Reset and Gyro Init were uplinked on 08/09 [DOY 221/2040z]. The spacecraft received all commands sent.

 

Voyager 2 command operations consisted of the uplink of CCSL B161 and a Command Loss Timer Reset on 08/04 [DOY 216/1119z]. The spacecraft received all commands sent and the CCSL was verified.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 62.9 hours of DSN scheduled support for Voyager 1 of which 21.7 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.  One frame of GS-4 data was recorded this week.  A second frame of GS-4 data was recorded on August 3.  The third frame of GS-4 data was recorded on August 8.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 81.8 hours of DSN scheduled support for Voyager 2 of which 18.2 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 LECP Observations on 8/5 (DOY 218), 8/6 (DOY 218-219), and 8/7 (DOY 219-220).

 

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

297.77*

20.30

260.4

11

2

5.01

26.15

261.6

31

                                                            * MAGROL 2013-215, LECP Observations 2013-218, 218a, 219

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,711,000,000

15,321,000,000

Distance from the Sun (Mi)

11,627,000,000

9,520,000,000

Distance from the Earth (Km)

18,652,000,000

15,210,000,000

Distance from the Earth (Mi)

11,590,000,000

9,451,000,000

Total Distance Traveled Since Launch (Km)

25,327,000,000

24,279,000,000

Total Distance Traveled Since Launch (Mi)

15,737,000,000

15,086,000,000

Velocity Relative to Sun  (Km/sec)

17.038

15.425

Velocity Relative to Sun  (Mi/hr)

38,112

34,505

Velocity Relative to Earth  (Km/sec)

42.738

36.565

Velocity Relative to Earth  (Mi/hr)

95,601

81,793

Round Trip Light Time (hh:mm:ss)

34:33:02

28:11:10