Voyager Mission Operations Status
Report # 2009-07-17, Week Ending July 17, 2009
Command Transmission &
Verification Operations
Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset and CCS CLK CAL on 07/15 [DOY 196/2130z]. The spacecraft received the commands.
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 07/16 [DOY 197/1142z]. The spacecraft received three of the seven commands sent.
Sequence Generation Operations
Continue
sequence development of CCSL B145.
Data Return Operations
Voyager
1 Data Processing and Operations:
There were 95.1 hours of DSN scheduled support for Voyager 1 of which 57.8 hours were large aperture coverage. There was one real-time schedule support change on 07/11 [DOY 193] when DSS-26 supported 4.3 hours in place of 4.9 hours of DSS-14 down due to a red antenna. The total actual support was 94.5 hours of which 52.9 hours were large aperture coverage.
There were two significant outages during the period. The first outage of 2.6 hours on 07/12 [DOY 193] resulted from a red Maser at DSS-45 [DR C107000]. The second outage of 2.5 hours occurred on 07/16 [DOY 197] and caused by a red antenna at DSS-63 [DR M105420].
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 July 17. The EDR backlog is
2 day.
Voyager
2 Data Processing and Operations:
There were 56.3 hours of DSN scheduled support for Voyager 2 of which 21.9 hours were large aperture coverage. There were three schedule changes all adding DSS-43support. The changes were on 07/12 [DOY 193] extending the existing track by 2.8 hours, on 07/14 [DOY195] 2.2 hours was added and on 07/06 [DOY 186] 2.3 hours of DSS-43 support again was added. The total actual support was 63.6 hours of which 29.2 hours were large aperture coverage. There were no 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.
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 |
4.43 |
26.62 |
277.2 |
33 |
|
2 |
5.32 |
28.27 |
278.5 |
33 |
RANGE, VELOCITY AND ROUND TRIP
LIGHT TIME AS OF 7/17/2009
|
|
Voyager 1 |
Voyager 2 |
|
Distance
from the Sun (Km) |
16,535,000,000 |
13,402,000,000 |
|
Distance
from the Sun (Mi) |
10,274,000,000 |
8,328,000,000 |
|
Distance
from the Earth (Km) |
16,440,000,000 |
13,275,000,000 |
|
Distance
from the Earth (Mi) |
10,215,000,000 |
8,249,000,000 |
|
Total
Distance Traveled Since Launch (Km) |
21,062,000,000 |
20,062,000,000 |
|
Total
Distance Traveled Since Launch (Mi) |
13,087,000,000 |
12,466,000,000 |
|
Velocity
Relative to Sun (Km/sec) |
17.082 |
15.505 |
|
Velocity
Relative to Sun (Mi/hr) |
38,212 |
34,683 |
|
Velocity
Relative to Earth (Km/sec) |
39.962 |
33.205 |
|
Velocity
Relative to Earth (Mi/hr) |
89,394 |
74,277 |
|
Round
Trip Light Time (hh:mm:ss) |
30:27:08 |
24:35:58 |