Voyager Mission Operations Status Report # 2013-04-26,  Week Ending  April 26, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 04/24 [DOY 114/2225z].  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 98.7 hours of DSN scheduled support for Voyager 1 of which 50.3 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.  Twenty-six frames of data were recovered from a playback of GS-4 data on April 26.  A second frame of GS-4 data was recorded on April 26.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 64.8 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.  Activities included a PMPCAL on 4/24 (DOY 114 and switching to X-Band high power on 4/24 (DOY 115).   Also, included DTR playback on 4/25 (DOY 115) and turning on the B&C gyros on 4/25 (DOY 116).

 

Voyager 2 performance was nominal during this report period.  Activities included switching to X-Band high power, MAGROL, B&C gyros off, and switching back to X-Band low power 0n 4/24 (DOY 114).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.17

21.04

261.5

13

2

52.74*

26.28

262.8

31

                                                            *MAGROL 2013-114/1723

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,557,000,000

15,185,000,000

Distance from the Sun (Mi)

11,531,000,000

9,436,000,000

Distance from the Earth (Km)

18,462,000,000

15,152,000,000

Distance from the Earth (Mi)

11,472,000,000

9,415,000,000

Total Distance Traveled Since Launch (Km)

25,016,000,000

24,017,000,000

Total Distance Traveled Since Launch (Mi)

15,544,000,000

14,924,000,000

Velocity Relative to Sun  (Km/sec)

17.040

15.429

Velocity Relative to Sun  (Mi/hr)

36,116

34,514

Velocity Relative to Earth  (Km/sec)

23.874

22.576

Velocity Relative to Earth  (Mi/hr)

53,404

50,501

Round Trip Light Time (hh:mm:ss)

34:11:46

28:04:26