Voyager Mission Operations Status Report # 2012-08-24, Week Ending August 24, 2012

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a EL-40 AACS MRO on 08/18 [DOY 231/1231z] and RELINK APPW PATCH with EL40 AACS MRO on 08/22 [DOY 235/2040z].  The spacecraft received all commands sent and the MROs 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 08/19 [DOY 232/1522z].  The spacecraft received two of the seven commands sent.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 47.2 hours of DSN scheduled support for Voyager 1 of which 34.4 hours were large aperture coverage. There was one schedule support change on 08/18 [DOY 231] when 1.8 hours of DSS-43 support was added.  The total actual support for the period was 49.0 hours of which 36.2 hours were large aperture coverage.  There were no 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 August 24.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 54.0 hours of DSN scheduled support for Voyager 2 of which 5.9 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.  Activities included a PMPCAL on 8/21 (DOY 234).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

8.14

22.34

264.3

31

2

4.30

26.73

265.5

31

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,198,000,000

14,868,000,000

Distance from the Sun (Mi)

11,308,000,000

9,239,000,000

Distance from the Earth (Km)

18,169,000,000

14,775,000,000

Distance from the Earth (Mi)

11,290,000,000

9,181,000,000

Total Distance Traveled Since Launch (Km)

24,338,000,000

23,291,000,000

Total Distance Traveled Since Launch (Mi)

15,123,000,000

14,473,000,000

Velocity Relative to Sun  (Km/sec)

17.044

15.439

Velocity Relative to Sun  (Mi/hr)

38,126

34,535

Velocity Relative to Earth  (Km/sec)

43.921

38.463

Velocity Relative to Earth  (Mi/hr)

98,247

86,038

Round Trip Light Time (hh:mm:ss)

33:39:22

27:22:48