Voyager Mission Operations Status Report # 2011-07-29,  Week Ending July 29, 2011

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 07/27 [DOY 208/1755z].  The spacecraft received the command.

 

There were no command operations in support of Voyager 2 during the period.

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 60.5 hours of DSN scheduled support for Voyager 1 of which 39.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 4.8 hours on 07/24 [DOY 205] DSS-26 was unable to configure the FSPA for the DSS-26/25 array [DR G111811].

 

 

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 July 29.  The EDR backlog is 1 day.

 

 

Voyager 2 Data Processing and Operations:

 

There were 52.3 hours of DSN scheduled support for Voyager 2 of which 4.7 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There were two significant outages due to a Red Antenna at DSS-45.  The first outage of 7.2 hours occurred on 07/24 [DOY 205, DR C108158].  The second outage of 2.5 hours occurred the next day on 07/25 [DOY 206, DR C108161]

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 1 days.

 

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.  Activities included one LECP observation on 7/26 (DOY 208) and a switch to the BC Gyros on 7/29 (DOY 211).

 

Voyager 2 performance was nominal during this report period.  Activity included a PMPCAL on 7/26 (DOY 207).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

52.47*

24.78

268.7

10

2

5.05

27.25

270.0

24

                                                          * 1 LECP Maneuver

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

17,623,000,000

14,361,000,000

Distance from the Sun (Mi)

10,951,000,000

8,924,000,000

Distance from the Earth (Km)

17,545,000,000

14,240,000,000

Distance from the Earth (Mi)

10,902,000,000

8,848,000,000

Total Distance Traveled Since Launch (Km)

23,194,000,000

22,170,000,000

Total Distance Traveled Since Launch (Mi)

14,419,000,000

13,776,000,000

Velocity Relative to Sun  (Km/sec)

17.054

15.458

Velocity Relative to Sun  (Mi/hr)

38,147

34,577

Velocity Relative to Earth  (Km/sec)

41.493

34.951

Velocity Relative to Earth  (Mi/hr)

92,817

78,182

Round Trip Light Time (hh:mm:ss)

32:29:58

26:23:14