Voyager Mission Operations Status Report # 2013-05-31,  Week Ending  May 31, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset, CCS CLK RST and CCSTIM F/C on 05/28 [DOY 148/2330z].  The spacecraft received all commands sent and all commands were verified.

 

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 05/29 [DOY 149/1607z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 115.8 hours of DSN scheduled support for Voyager 1 of which 46.2 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 30.  he EDR backlog is 2 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 72.5 hours of DSN scheduled support for Voyager 2 of which 11.0 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.  The EDR backlog is 2 days.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.  Activity included DTR Maintenance on 5/28 (DOY 148).

 

Voyager 2 performance was nominal during this report period.  Activities included a PMPCAL on 5/28 (DOY 148) and turning on the A&C gyros for gyro conditioning on 5/31 (DOY 151).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

4.93

20.64

261.1

26

2

5.04

26.25

262.4

33

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,609,000,000

15,231,000,000

Distance from the Sun (Mi)

11,563,000,000

9,464,000,000

Distance from the Earth (Km)

18,485,000,000

15,136,000,000

Distance from the Earth (Mi)

11,486,000,000

9,405,000,000

Total Distance Traveled Since Launch (Km)

25,099,000,000

24,090,000,000

Total Distance Traveled Since Launch (Mi)

15,596,000,000

14,969,000,000

Velocity Relative to Sun  (Km/sec)

19.030

15.428

Velocity Relative to Sun  (Mi/hr)

38,115

34,511

Velocity Relative to Earth  (Km/sec)

31.274

25.040

Velocity Relative to Earth  (Mi/hr)

69,958

57,802

Round Trip Light Time (hh:mm:ss)

34:14:22

28:02:42