Voyager Mission Operations Status Report # 2013-08-23  Week Ending  August 23, 2013

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 08/22 [DOY 234/1800z].  The spacecraft received the command.

 

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 231/1852z].  The spacecraft received three of the seven commands sent

 

Sequence Generation Operations

 

Start sequence development of CCSL A089.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 75.7 hours of DSN scheduled support for Voyager 1 of which 9.6 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There were three significant outages during the period associated with a Red Maser on one of the two stations of a two station array.  The first outage of 1.3 hours on 08/19 [DOY 231] resulted from DSS-26 of the DSS-26/25 array supporting with a Red Maser.  The second outage of 1.3 hours on 08/20 [DOY 232] DSS-24 of the DSS-24/25 array supported with a Red Maser. The third outage of 0.9 hours on 08/21 [DOY 233] DSS-25 of the DSS-24/25 array supported with a Red Maser.

 

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 17.  The third frame of GS-4 data was recorded on August 22.  The EDR backlog is 1 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 61.8 hours of DSN scheduled support for Voyager 2 of which 5.1 hours were large aperture coverage.  There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 0.9 hours on 08/18 [DOY 230] due to heavy rain at DSS-43 [DR C109504].

 

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.

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

4.14

20.16

260.3

27

2

4.84

26.14

261.5

31

 

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,732,000,000

15,340,000,000

Distance from the Sun (Mi)

11,639,000,000

9,532,000,000

Distance from the Earth (Km)

18,700,000,000

15,245,000,000

Distance from the Earth (Mi)

11,620,000,000

9,473,000,000

Total Distance Traveled Since Launch (Km)

25,379,000,000

24,324,000,000

Total Distance Traveled Since Launch (Mi)

15,770,000,000

15,114,000,000

Velocity Relative to Sun  (Km/sec)

17.037

15.425

Velocity Relative to Sun  (Mi/hr)

38,112

34,504

Velocity Relative to Earth  (Km/sec)

43.826

38.297

Velocity Relative to Earth  (Mi/hr)

98,036

85,668

Round Trip Light Time (hh:mm:ss)

34:38:22

28:15:02