Voyager Mission Operations Status Report # 2012-05-04, Week Ending May 04, 2012

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 05/01 [DOY 122/1440z].  The spacecraft received the command.

 

There were no command operations in support of Voyager 2 during the period.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 57.7 hours of DSN scheduled support for Voyager 1 of which 27.8 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.  One frame of GS-4 data was recorded this week.  A second frame of GS-4 data was recorded on May 4.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 35.3 hours of DSN scheduled support for Voyager 2 of which 6.9 hours were large aperture coverage.  There were no real-time or schedule support changes made during the period.

 

There were two significant outages during the period.  The first outage of 4.6 hours on 04/30 [DOY 121] was caused by a failing HEMT at DSS-34 [DR C108639].  The second outage of 4.6 hours occurred the next day on 05/01 [DOY 122] and was due to a failed HEMT at DSS-34 [DR C108646].

 

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 an ASCAL on 5/1(DOY122), LECP observations on 5/1 (DOY 123) and 5/2 (DOY 123), and a MAGROL on 5/4 (DOY 125).

 

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

116.64*

23.31

265.6

13

2

5.80

26.83

266.8

37

                                                            *ASCAL on 2012/122 and two LECP Observations on 2012/1231

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,033,000,000

14,723,000,000

Distance from the Sun (Mi)

11,206,000,000

9,149,000,000

Distance from the Earth (Km)

17,928,000,000

14,672,000,000

Distance from the Earth (Mi)

11,140,000,000

9,117,000,000

Total Distance Traveled Since Launch (Km)

23,988,000,000

22,997,000,000

Total Distance Traveled Since Launch (Mi)

14,905,000,000

14,290,000,000

Velocity Relative to Sun  (Km/sec)

17.047

15.444

Velocity Relative to Sun  (Mi/hr)

38,133

34,546

Velocity Relative to Earth  (Km/sec)

25.553

23.000

Velocity Relative to Earth  (Mi/hr)

57,159

51,450

Round Trip Light Time (hh:mm:ss)

33:12:26

27:11:10