Voyager Mission Operations Status Report # 2013-09-06  Week Ending  September 6, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 09/03 [DOY 246/2035z].  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 09/05 [DOY 248/1552z].  The spacecraft received five of the seven commands sent.

 

Sequence Generation Operations

 

Continue sequence development of CCSL A089.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 87.7 hours of DSN scheduled support for Voyager 1 of which 64.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 2.2 hours on 09/03 [DOY 246] due to failure of an antenna servo pump at DSS-14 [DR G114232].

 

 

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 31.  The third frame of GS-4 data was recorded on September 5.  The EDR backlog is 2 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 79.3 hours of DSN scheduled support for Voyager 2 of which 11.4 hours were large aperture coverage. One schedule change was made on 09/03 [DOY 246] when 3.6 hours of DSS-34 support was released.  The total actual support was 75.7 hours of which 11.4 hours were large aperture coverage.  There were no 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.

 

Voyager 2 performance was nominal during this report period.  Activity included switching to the B&C gyros on 9/5 (DOY 249).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.04

20.15

260.1

26

2

5.61

26.13

261.3

16

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,752,000,000

15,358,000,000

Distance from the Sun (Mi)

11,652,000,000

9,543,000,000

Distance from the Earth (Km)

18,749,000,000

15,285,000,000

Distance from the Earth (Mi)

11,650,000,000

9,498,000,000

Total Distance Traveled Since Launch (Km)

25,433,000,000

24,371,000,000

Total Distance Traveled Since Launch (Mi)

15,803,000,000

15,144,000,000

Velocity Relative to Sun  (Km/sec)

17.037

15.424

Velocity Relative to Sun  (Mi/hr)

38,110

34,503

Velocity Relative to Earth  (Km/sec)

44.476

39.771

Velocity Relative to Earth  (Mi/hr)

99,489

88,964

Round Trip Light Time (hh:mm:ss)

34:43:52

28:19:30