Voyager Mission Operations Status Report # 2013-04-19,  Week Ending  April 19, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 04/18 [DOY 108/1340z].  The spacecraft received the command.

 

There were no command operations in support of Voyager 2 during the period due to DSS-43 downtime.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 106.1 hours of DSN scheduled support for Voyager 1 of which 41.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 0.7 hours on 04/16 [DOY 106] due the FSPA dropped lock when adding DSS-15 to the DSS-26/15 Array  [DR G113867].

 

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 April 19.  The EDR backlog is 2 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 53.3 hours of DSN scheduled support for Voyager 2 of which 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.

 

Voyager 2 performance was nominal during this report period.  Activity included turning on the B&C gyros on 4/17 (DOY 107).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.82

21.04

261.6

28

2

4.90

26.33

262.9

18

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,547,000,000

15,176,000,000

Distance from the Sun (Mi)

11,525,000,000

9,430,000,000

Distance from the Earth (Km)

18,462,000,000

15,157,000,000

Distance from the Earth (Mi)

11,472,000,000

9,418,000,000

Total Distance Traveled Since Launch (Km)

25,001,000,000

24,004,000,000

Total Distance Traveled Since Launch (Mi)

15,535,000,000

14,915,000,000

Velocity Relative to Sun  (Km/sec)

17.040

15.429

Velocity Relative to Sun  (Mi/hr)

38,116

34,514

Velocity Relative to Earth  (Km/sec)

22.570

22.429

Velocity Relative to Earth  (Mi/hr)

50,486

50,171

Round Trip Light Time (hh:mm:ss)

34:11:44

28:05:02