Voyager Mission Operations Status Report # 2009-09-11, Week Ending September 11, 2009
Command Transmission & Verification Operations
Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 09/10 [DOY 253/2130z]. 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 09/09 [DOY 252/1432z]. The spacecraft received four of the seven commands sent.
Sequence Generation Operations
Continue sequence development of CCSL A073.
Data Return Operations
Voyager 1 Data Processing and Operations:
There were 99.5 hours of DSN scheduled support for Voyager 1 of which 64.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.
There was one significant outage of 0.8 hours on 09/10 [DOY 253] due to a DCC-3 problem at DSS-45 [DR C107085].
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 September 11. The EDR backlog is 2 day.
Voyager 2 Data Processing and Operations:
There were 72.1 hours of DSN scheduled support for Voyager 2 of which 44.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.
There were two significant outages both due to rain. The first outage of 1.2 hours occurred over DSS-45on 09/06 [DOY 249, DR C107075]. The second outage of 0.8 hours occurred also during a DSS-45 support on 09/08 [DOY 251, DR C107081]
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. Activity included turning on the AB Gyros on 9/9 (DOY 252).
Voyager 2 performance was nominal during this report period. Activity included switching to the BC Gyros on 9/11 (DOY 254).
PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT
|
Spacecraft |
Consumption One Week (Gm) |
Propellant Remaining (Kg) |
Output (Watts) |
Margin (Watts) |
|
1 |
4.69 |
26.54 |
276.5 |
20 |
|
2 |
5.27 |
28.22 |
277.8 |
18 |
RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 9/11/2009
|
|
Voyager 1 |
Voyager 2 |
|
Distance from the Sun (Km) |
16,617,000,000 |
13,475,000,000 |
|
Distance from the Sun (Mi) |
10,325,000,000 |
8,373,000,000 |
|
Distance from the Earth (Km) |
16,626,000,000 |
13,411,000,000 |
|
Distance from the Earth (Mi) |
10,331,000,000 |
8,333,000,000 |
|
Total Distance Traveled Since Launch (Km) |
21,269,000,000 |
20,241,000,000 |
|
Total Distance Traveled Since Launch (Mi) |
13,216,000,000 |
12,577,000,000 |
|
Velocity Relative to Sun (Km/sec) |
17.080 |
15.501 |
|
Velocity Relative to Sun (Mi/hr) |
38,205 |
34,674 |
|
Velocity Relative to Earth (Km/sec) |
44.601 |
40.256 |
|
Velocity Relative to Earth (Mi/hr) |
99,768 |
90,051 |
|
Round Trip Light Time (hh:mm:ss) |
30:47:52 |
24:51:06 |