Voyager Mission Operations Status Report # 2008-03-14,  Week Ending  March 14, 2008

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 03/11 [DOY 071/2230z].  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 03/10 [DOY 070/1812z].  The spacecraft received four of the seven commands sent.

 

Sequence Generation Operations

 

Continue sequence development of CCSL A067.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 84.7 hours of DSN scheduled support for Voyager 1 of which 23.0 hours were large aperture coverage. One schedule change was made on 03/12 [DOY 072] when 3.3 hours of DSS-45 support was released to support MSGR.  The total actual support was 81.4 hours of which 23.0 hours were large aperture coverage.

 

There was one significant outage of 1.5 hours on 03/10 [DOY070] due to a receiver problem at DSS-65 [DR M104711].

 

 

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 March 14.  The EDR backlog is 2 days.

 

Voyager 2 Data Processing and Operations:

 

There were 50.8 hours of DSN scheduled support for Voyager 2 of which 29.4 hours were large aperture coverage. One schedule change was made on 03/13 [DOY 073] when 11.3 hours of DSS-43 support was released to antenna downtime.  The total actual support was 73.5 hours of which 18.1 hours were large aperture coverage.  There were no significant outages.

 

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 2 day.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.  Activities included switching to X-Band high power on 3/11 (DOY 071), MAGROL on 3/12 (DOY 072), and switching back to X-Band low power on 3/13 (DOY 073).

 

Voyager 2 performance was nominal during this report period.  Activities included an ASCAL on 3/10 (DOY 070) and a MAGROL on 3/13 (DOY 073).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

43.44*

27.28

282.8

37

2

8.35**

29.04 

284.3

39

                                                                *MAGROL 08-072/1010                      **ASCAL 08-070/2016

 

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 3/14/2008

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

15,815,000,000

12,770,000,000

Distance from the Sun (Mi)

9,827,000,000

7,935,000,000

Distance from the Earth (Km)

15,948,000,000

12,824,000,000

Distance from the Earth (Mi)

9,814,000,000

7,969,000,000

Total Distance Traveled Since Launch (Km)

19,710,000,000

18,747,000,000

Total Distance Traveled Since Launch (Mi)

12,247,000,000

11,649,000,000

Velocity Relative to Sun  (Km/sec)

17.110

15.543

Velocity Relative to Sun  (Mi/hr)

38,272

34,767

Velocity Relative to Earth  (Km/sec)

18.859

24.565

Velocity Relative to Earth  (Mi/hr)

42,186

54,949

Round Trip Light Time (hh:mm:ss)

29:15:16

23:45:42