Voyager Mission Operations Status
Report # 2009-07-10, Week Ending July 10, 2009
Command Transmission &
Verification Operations
Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset , CCSL A072 and CCS SID MRO on 07/08 [DOY 189/0025z]. The spacecraft received all commands sent. The CCSL and SID MRO were verified.
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 at a transmitter power of 75 kW on 07/06 [DOY 187/1542z]. The spacecraft received six the seven commands sent.
Sequence Generation Operations
Continue
sequence development of CCSL B145.
Data Return Operations
Voyager
1 Data Processing and Operations:
There were 83.4 hours of DSN scheduled support for Voyager 1 of which 42.3 hours were large aperture coverage. There was one schedule support change on 07/04 [DOY 185] when 2.5 hours of DSS-63 replaced 4.4 hours of DSS-65 support. The total actual support was 81.5 hours of which 44.8 hours were large aperture coverage.
There was one significant outage of 2.4 hours on 07/04 [DOY 185] due to a red Maser at DSS-45 [DR C106988].
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 10. The EDR backlog is
2 day.
Voyager
2 Data Processing and Operations:
There were 63.6 hours of DSN scheduled support for Voyager 2 of which 18.8 hours were large aperture coverage. There were five schedule changes all adding DSS-43support on successive days. The changes were on 07/04 [DOY 185] 2.8 hours added, on 07/05 [DOY186] 3.1 hours of an existing track extended and on 07/06 [DOY 186] 2.3 hours of DSS-43 support added. The remaining tracks on 07/07 [DOY 188] and on 07/09 [DOY 190] replaced 0.8 hours of DSS-45 support both days with 2.5 and 1.8 hours of DSS-43 support respectively. The total actual support was 74.5 hours of which 31.3 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 |
4.46 |
26.62 |
277.3 |
33 |
|
2 |
5.49 |
28.27 |
278.6 |
33 |
RANGE, VELOCITY AND ROUND TRIP
LIGHT TIME AS OF 7/10/2009
|
|
Voyager 1 |
Voyager 2 |
|
Distance
from the Sun (Km) |
16,524,000,000 |
13,393,000,000 |
|
Distance
from the Sun (Mi) |
10,268,000,000 |
8,322,000,000 |
|
Distance
from the Earth (Km) |
16,420,000,000 |
13,266,000,000 |
|
Distance
from the Earth (Mi) |
10,203,000,000 |
8,243,000,000 |
|
Total
Distance Traveled Since Launch (Km) |
21,038,000,000 |
20,042,000,000 |
|
Total
Distance Traveled Since Launch (Mi) |
13,072,000,000 |
12,453,000,000 |
|
Velocity
Relative to Sun (Km/sec) |
17.083 |
15.506 |
|
Velocity
Relative to Sun (Mi/hr) |
38,212 |
34,685 |
|
Velocity
Relative to Earth (Km/sec) |
38.880 |
32.076 |
|
Velocity
Relative to Earth (Mi/hr) |
86,971 |
71,750 |
|
Round
Trip Light Time (hh:mm:ss) |
30:25:00 |
24:34:52 |