Voyager Mission Operations Status Report # 2013-07-19  Week Ending  July 19, 2013

 

Command Transmission & Verification Operations

 

There were no command operations in support of Voyager 1 during the period.

 

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 07/19 [DOY 200/1402z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 66.5 hours of DSN scheduled support for Voyager 1 of which 9.3 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 13.  The third frame of GS-4 data was recorded on July 18.  The EDR backlog is 1 days.

 

Voyager 2 Data Processing and Operations:

 

There were 74.7 hours of DSN scheduled support for Voyager 2 of which 6.4 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 07/18 [DOY 199] due to heavy rain at DSS-34 [DR C109455].

 

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.  Activity included turning on the A&C gyros for conditioning on 7/19 (DOY 200).

 

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

5.17

20.61

260.7

26

2

4.88

26.16

261.9

31

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,681,000,000

15,294,000,000

Distance from the Sun (Mi)

11,608,000,000

9,503,000,000

Distance from the Earth (Km)

18,587,000,000

15,170,000,000

Distance from the Earth (Mi)

11,550,000,000

9,426,000,000

Total Distance Traveled Since Launch (Km)

25,251,000,000

24,215,000,000

Total Distance Traveled Since Launch (Mi)

15,690,000,000

15,046,000,000

Velocity Relative to Sun  (Km/sec)

17.038

15.426

Velocity Relative to Sun  (Mi/hr)

38,113

34,506

Velocity Relative to Earth  (Km/sec)

40.212

33.479

Velocity Relative to Earth  (Mi/hr)

89,951

74,890

Round Trip Light Time (hh:mm:ss)

34:25:48

28:06:40