Voyager Mission Operations Status Report # 2008-02-08,  Week Ending  February 8, 2008

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 02/03 [DOY 034/1345z].  The spacecraft received the command.

 

Voyager 2 command operations consisted of the uplink of a Command Loss Timer Reset and CCSL B139 on 02/08 [DOY 039/2210z].  The spacecraft received all commands sent and the CCSL was verified.

 

Sequence Generation Operations

 

Complete sequence development of CCSL B139.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 76.5 hours of DSN scheduled support for Voyager 1 of which 22.0 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There were three significant outages all caused by the weather. The first outage of 2.7 hours on 02/03[DOY 034] was caused by rain during the DSS-65 support [DR M104651].  The second outage of 2.3 hours occurred during the next track on 02/03 [DOY 034]  and arose  from high winds which required  taking the supporting antenna,  DSS-14, to stow and  bringing up a (smaller) antenna, DSS-25 for the remainder of the period [DR G108322].  The last outage of 3.0 hours, again, occurred during the next track on 02/04 [DOY 035] which again resulted from rain during the DSS-45 support [DR C106162]. 

 

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 February 8.  The EDR backlog is 3 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 55.7 hours of DSN scheduled support for Voyager 2 of which 13.4 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 day.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.

 

Voyager 2 performance was nominal during this report period.  Activity included a PMPCAL on 2/5 (DOY 036).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

45.67*

27.35

283.3

40

2

7.46

29.07

284.7

33

                                                                *MAGROL 08-032/1338

 

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 2/8/2008

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

15,763,000,000

12,725,000,000

Distance from the Sun (Mi)

9,795,000,000

7,907,000,000

Distance from the Earth (Km)

15,816,000,000

12,834,000,000

Distance from the Earth (Mi)

9,828,000,000

7,975,000,000

Total Distance Traveled Since Launch (Km)

19,649,000,000

18,665,000,000

Total Distance Traveled Since Launch (Mi)

12,209,000,000

11,598,000,000

Velocity Relative to Sun  (Km/sec)

17.111

15.545

Velocity Relative to Sun  (Mi/hr)

38,277

34,773

Velocity Relative to Earth  (Km/sec)

22.431

29.998

Velocity Relative to Earth  (Mi/hr)

50,176

67,104

Round Trip Light Time (hh:mm:ss)

29:17:38

23:46:52