Voyager
Mission Operations Status Report # 2011-12-09, Week Ending December 9, 2011
Command
Transmission & Verification Operations
Voyager 1 command operations consisted of the uplink of a Command
Loss Timer Reset on 12/05 [DOY 339/2145z].
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 12/07 [DOY 341/1257z]. The spacecraft received
two of the seven commands sent.
Sequence
Generation Operations
Continue sequence development of CCSL A082A and start development
of CCSL B154C.
Data Return
Operations
Voyager 1 Data Processing and Operations:
There were 32.3 hours of DSN
scheduled support for Voyager 1 of which 28.3 hours were large aperture
coverage. There were no real-time or
schedule support changes made during the period.
There was one significant outage of 0.5 hours on 12/08 [DOY 342]
due to an antenna Problem at DSS-43 [DR C108362].
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
December 9. The EDR backlog is 2 days.
Voyager 2 Data Processing and Operations:
There were 33.8 hours of DSN
scheduled support for Voyager 2 of which 15.8 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 turning off the IRIS
Replacement Heater, X-Band high power, full memory readout, and X-Band low
power on 12/7 (DOY 341).
Voyager 2 performance was nominal during this report period.
Activity included X-Band high power, one 360 degree negative roll turn, gyros
OFF, and X-Band low power on 12/9 (DOY 343).
PROPELLANT/POWER
CONSUMABLES STATUS AS OF THIS REPORT
|
Spacecraft |
Consumption One Week (Gm) |
Propellant Remaining
(Kg) |
Output (Watts) |
Margin (Watts) |
|
1 |
4.56 |
23.98 |
267.3 |
33 |
|
2 |
5.50 |
27.056 |
268.5 |
28 |
RANGE,
VELOCITY AND ROUND TRIP LIGHT TIME AS OF THIS REPORT
|
|
Voyager 1 |
Voyager 2 |
|
Distance from the Sun (Km) |
17,818,000,000 |
14,533,000,000 |
|
Distance from the Sun (Mi) |
11,072,000,000 |
9,030,000,000 |
|
Distance from the Earth (Km) |
17,939,000,000 |
14,636,000,000 |
|
Distance from the Earth (Mi) |
11,147,000,000 |
9,094,000,000 |
|
Total Distance Traveled Since Launch (Km) |
23,680,000,000 |
22,630,000,000 |
|
Total Distance Traveled Since Launch (Mi) |
14,714,000,000 |
14,061,000,000 |
|
Velocity Relative to Sun
(Km/sec) |
17.050 |
15.451 |
|
Velocity Relative to Sun
(Mi/hr) |
38,139 |
34,562 |
|
Velocity Relative to Earth
(Km/sec) |
35.648 |
39.170 |
|
Velocity Relative to Earth
(Mi/hr) |
79,742 |
87,620 |
|
Round Trip Light Time (hh:mm:ss) |
33:13:42 |
27:07:20 |