Voyager Mission Operations Status
Report # 2009-05-01, Week Ending May 1, 2009
Command Transmission &
Verification Operations
Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 04/27 [DOY 117/2325z]. The spacecraft received the command.
There were no command operations in support of Voyager 2 during the period.
Sequence Generation Operations
Complete
sequence development of CCSL B144.
Data Return Operations
Voyager
1 Data Processing and Operations:
There were 75.8 hours of DSN scheduled support for Voyager 1of which 37.8 hours were large aperture coverage. Two schedule changes were made both due to the down time of DSS-14. The first change on 04/30 [DOY 120] substituted for 9.8 hours of DSS-14 support 4.2 hours of the array DSS-24/15/25/26 followed by 3.8 hours of DSS-15 standalone. The following day 9.3 hours of DSS-14 support was replaced by 5.9 hours of DSS-24. The total actual support was 70.6 hours of which 18.7 hours were large aperture coverage. There were no significant outages during the period.
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 April 28. The EDR backlog is
1 day.
Voyager
2 Data Processing and Operations:
There were 59.1 hours of DSN scheduled support for Voyager 2 of which 42.3 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.
There was one significant outage of 1.2 hours on 04/25 [DOY 115] due to rain at DSS-45 [DR C106891].
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 4/29 [DOY
119], X-Band high power and DTR playback on 4/29 [DOY 120], and turning on the B&C gyros on 4/30
[DOY121].
Voyager
2 performance was nominal during this report period. Activities included X-Band high power, MAGROL
followed by gyros OFF, and X-Band low power on 4/29 [DOY 119].
PROPELLANT/POWER CONSUMABLES
STATUS AS OF THIS REPORT
|
Spacecraft |
Consumption One Week (Gm) |
Propellant Remaining (Kg) |
Output (Watts) |
Margin (Watts) |
|
1 |
5.28 |
26.71 |
278.1 |
15 |
|
2 |
46.06* |
28.37 |
279.4 |
34 |
*MAGROL
2009-119/1633
RANGE, VELOCITY AND ROUND TRIP
LIGHT TIME AS OF 5/1/2009
|
|
Voyager 1 |
Voyager 2 |
|
Distance
from the Sun (Km) |
16,421,000,000 |
13,303,000,000 |
|
Distance
from the Sun (Mi) |
10,204,000,000 |
8,266,000,000 |
|
Distance
from the Earth (Km) |
16,319,000,000 |
13,257,000,000 |
|
Distance
from the Earth (Mi) |
10,140,000,000 |
8,237,000,000 |
|
Total
Distance Traveled Since Launch (Km) |
20,843,000,000 |
19,880,000,000 |
|
Total
Distance Traveled Since Launch (Mi) |
12,951,000,000 |
12,352,000,000 |
|
Velocity
Relative to Sun (Km/sec) |
17.086 |
15.511 |
|
Velocity
Relative to Sun (Mi/hr) |
38,221 |
34,696 |
|
Velocity
Relative to Earth (Km/sec) |
24.890 |
22.783 |
|
Velocity
Relative to Earth (Mi/hr) |
55,678 |
50,963 |
|
Round
Trip Light Time (hh:mm:ss) |
30:13:32 |
24:33:48 |