Voyager Mission Operations Status Report # 2012-04-27, Week Ending April 27, 2012

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset, CCSL A083, and AHELIO SID MRO on 04/23 [DOY 114/1710z].  The spacecraft received all commands sent and the CCSL was verified.

 

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

 

Sequence Generation Operations

 

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 57.5 hours of DSN scheduled support for Voyager 1 of which 47.8 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.

 

There was one significant outage of 0.8 hours on 04/26 [DOY 117] due to rain at over the DSS-14/15/25 Array, DRs G112618 and G112619.

 

Science instrument performance was nominal for all activities during this period.  One frame of GS-4 data was recorded this week.  Twenty-four frames of data were recovered from a playback of GS-4 data on April 26.  A second frame of GS-4 data was recorded on April 27.  The EDR backlog is 2 days.

 

 

Voyager 2 Data Processing and Operations:

 

There were 40.8 hours of DSN scheduled support for Voyager 2 of which 11.8 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 days.

 

Flight System Performance

 

Voyager 1 performance was nominal during this report period.  Activities included a PMPCAL on 4/25 DOY 116), X-Band high power and DTR PWS playback on 4/25 (DOY 117), and turning on Gyros B & C on 4/26 (DOY 118).

 

Voyager 2 performance was nominal during this report period.  Activities included switching to X-Band high power, executing a MAGROL, followed by Gyros OFF on 4/25 (DOY 116).

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

5.18

23.42

265.7

13

2

48.51*

26.84

266.9

37

                                                            *MAGROL 2012/116

 

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

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

18,024,000,000

14,714,000,000

Distance from the Sun (Mi)

11,199,000,000

9,143,000,000

Distance from the Earth (Km)

17,927,000,000

14,677,000,000

Distance from the Earth (Mi)

11,139,000,000

9,120,000,000

Total Distance Traveled Since Launch (Km)

23,973,000,000

22,983,000,000

Total Distance Traveled Since Launch (Mi)

14,896,000,000

14,281,000,000

Velocity Relative to Sun  (Km/sec)

17.047

15.444

Velocity Relative to Sun  (Mi/hr)

38,133

34,547

Velocity Relative to Earth  (Km/sec)

24.143

22.637

Velocity Relative to Earth  (Mi/hr)

54,005

50,638

Round Trip Light Time (hh:mm:ss)

33:12:14

27:11:42