Voyager Mission Operations Status Report # 2009-08-14,  Week Ending  August 14, 2009

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 08/13 [DOY 225/2130z].  The spacecraft received the command.

 

Voyager 2 command operations consisted of the uplink of a Command Loss Timer Reset and CCSL B145 on 08/11 [DOY 233/1340z]. The spacecraft received all commands sent and the CCSL was verified

 

Sequence Generation Operations

 

Continue sequence development of HPOINT Table update (part 2).

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 102.8 hours of DSN scheduled support for Voyager 1 of which 63.6 hours were large aperture coverage. One schedule change was made on 08/10 [DOY 222] when 1.8 hours of DSS-63 support was released to support MAP.  The total actual support was 101.0 hours of which 61.8 hours were large aperture coverage.

 

There were two significant outages during the period.  The first outage of 0.6 hours on 08/08 [DOY 220] was caused by the sub reflector set in a fixed 45 degree position at DSS-15 [No DR written].  The second outage of 1.3 hours occurred on 08/13 [DOY 225] and resulted from an array problem with the DSS-24/15 array [DR G109615].

 

 

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 14.  The EDR backlog is 9 day.

 

Voyager 2 Data Processing and Operations:

 

There were 64.7 hours of DSN scheduled support for Voyager 2 of which 37.5 hours were large aperture coverage. One schedule change was made on 08/13 [DOY 225] when a DSS-43 track was extended 2.8 hour earlier.  The total actual support was 67.5 hours of which 40.3 hours were large aperture coverage

 

 

Science instrument performance was nominal for all activities during this period.  The EDR backlog is 9 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

49.93*

26.55

276.9

35

2

5.05

28.25

278.2

32

                                                                *MAGROL 09-220/0130

 

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 8/14/2009

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

16,576,000,000

13,439,000,000

Distance from the Sun (Mi)

10,300,000,000

8,350,000,000

Distance from the Earth (Km)

16,527,000,000

13,331,000,000

Distance from the Earth (Mi)

10,270,000,000

8,284,000,000

Total Distance Traveled Since Launch (Km)

21,163,000,000

20,147,000,000

Total Distance Traveled Since Launch (Mi)

13,150,000,000

12,519,000,000

Velocity Relative to Sun  (Km/sec)

17.081

15.503

Velocity Relative to Sun  (Mi/hr)

38,208

34.679

Velocity Relative to Earth  (Km/sec)

43.213

37.262

Velocity Relative to Earth  (Mi/hr)

96,664

83,352

Round Trip Light Time (hh:mm:ss)

30:36:56

24:42:14