Voyager Mission Operations Status Report # 2012-08-03, Week Ending August 3, 2012

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 07/30 [DOY 212/2250z].  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 08/02 [DOY 215/1427z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 57.0 hours of DSN scheduled support for Voyager 1 of which 49.8 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 0.7 hours on 08/01 [DOY 214] due to rain at DSS-14 [DR G113069].

 

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 EDR backlog is 6 days.

 

Voyager 2 Data Processing and Operations:

 

There were 52.8 hours of DSN scheduled support for Voyager 2 of which 44.9 hours were large aperture coverage.  There were no real-time or schedule support changes made or significant outages during the period.

 

Voyager 1 performance was nominal during this report period.  Activities included switching to X-Band high power and execution of a MAGROL on 7/23 (DOY 206), and LECP observations on 7/24 (DOY 207, 7/25 (DOY 208), and 7/26 (DOY 209).

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 7 days.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.  Activities included LECP Observations 7/29 (DOY 212), 7/30 (DOY 213), 7/31 (DOY 214), 8/1 (DOY 215), and 8/2 (DOY 216)

 

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

275.80*

22.42

264.5

11

2

4.36

26.72

265.7

31

                                                            *LECP Observations 2012/211, 212, 213, 214, 215, 216

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,167,000,000

14,841,000,000

Distance from the Sun (Mi)

11,289,000,000

9,222,000,000

Distance from the Earth (Km)

18,098,000,000

14,725,000,000

Distance from the Earth (Mi)

11,246,000,000

9,149,000,000

Total Distance Traveled Since Launch (Km)

24,260,000,000

23,224,000,000

Total Distance Traveled Since Launch (Mi)

15,075,000,000

14,431,000,000

Velocity Relative to Sun  (Km/sec)

17.045

15.440

Velocity Relative to Sun  (Mi/hr)

38,127

34,537

Velocity Relative to Earth  (Km/sec)

42.130

35.754

Velocity Relative to Earth  (Mi/hr)

94,241

79,979

Round Trip Light Time (hh:mm:ss)

33:31:28

27:17:08