Voyager Mission Operations Status Report # 2012-07-27, Week Ending July 27, 2012

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 07/24 [DOY 206/2225z].  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 07/26 [DOY 208/1527z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 56.3 hours of DSN scheduled support for Voyager 1 of which 26.0 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 July 27.  The EDR backlog is 14 days.

 

Voyager 2 Data Processing and Operations:

 

There were 58.3 hours of DSN scheduled support for Voyager 2 of which 15.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 3.2 hours on 07/25 [DOY 207] due to rain at DSS-45 [DR C108902].

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 14 days.

 

Flight System Performance

 

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).

 

Voyager 2 performance was nominal during this report period.  Activity included a PMPCAL on 7/24 (DOY 206).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

152.97*

22.69

264.6

13

2

4.43

26.72

265.8

33

                                                            *MAGROL 2012/206, LECP Observations 2012/207 & 208

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,157,000,000

14,832,000,000

Distance from the Sun (Mi)

11,282,000,000

9,216,000,000

Distance from the Earth (Km)

18,076,000,000

14,711,000,000

Distance from the Earth (Mi)

11,232,000,000

9,141,000,000

Total Distance Traveled Since Launch (Km)

24,235,000,000

23,203,000,000

Total Distance Traveled Since Launch (Mi)

15,059,000,000

14,418,000,000

Velocity Relative to Sun  (Km/sec)

17.049

15.440

Velocity Relative to Sun  (Mi/hr)

38,128

34,538

Velocity Relative to Earth  (Km/sec)

41.323

34.748

Velocity Relative to Earth  (Mi/hr)

92,436

77,728

Round Trip Light Time (hh:mm:ss)

33:29:02

27:15:36