Voyager Mission Operations Status Report # 2013-09-13  Week Ending  September 13, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 09/12 [DOY 255/2130z].  The spacecraft received the command.

 

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

 

Sequence Generation Operations

 

Continue sequence development of CCSL A089.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 65.3 hours of DSN scheduled support for Voyager 1 of which 41.5 hours were large aperture coverage. There was one schedule support change on 09/09 [DOY 253] when 1.8 hours of DSS-14 support was released to DJF. The DSS-25/26 array supported 0.3 hours in place.  The total actual support for the period was 63.8 hours of which 39.7 hours were large aperture coverage.

 

There was one significant outage of 0.4 hours on 09/07 [DOY 250] due to rain at DSS-25/24 [DRs G114247, G114248].

 

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 September 7.  The third frame of GS-4 data was recorded on September 13.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 59.2 hours of DSN scheduled support for Voyager 2 of which 29.8 hours were large aperture coverage. There was one schedule support change on 09/07 [DOY 250] when 0.5 hours of DSS-43 support was released to LMA. The total actual support for the period was 58.7 hours of which 29.3 hours were large aperture coverage. There were no 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 9/10 (DOY 254) and turning on the B&C Gyros on 9/11 (DOY 254).

 

Voyager 2 performance was nominal during this report period.  Activities included switching to X-Band high power and executing an ASCAL on 9/10 (DOY 254) and a MAGROL, gyros OFF, and X-Band low power on 9/13 (DOY 256).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.29

20.14

260.0

11

2

7.73*

26.12

261.2

31

                                                          *ASCAL 2013-253

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,763,000,000

15,367,000,000

Distance from the Sun (Mi)

11,659,000,000

9,548,000,000

Distance from the Earth (Km)

18,774,000,000

15,307,000,000

Distance from the Earth (Mi)

11,666,000,000

9,511,000,000

Total Distance Traveled Since Launch (Km)

25,460,000,000

24,395,000,000

Total Distance Traveled Since Launch (Mi)

15,820,000,000

15,159,000,000

Velocity Relative to Sun  (Km/sec)

17.037

15.424

Velocity Relative to Sun  (Mi/hr)

38,111

34,502

Velocity Relative to Earth  (Km/sec)

44.585

40.354

Velocity Relative to Earth  (Mi/hr)

99,733

90,269

Round Trip Light Time (hh:mm:ss)

34:46:38

28:21:56