Voyager
Mission Operations Status Report # 2012-09-21, Week Ending September 21, 2012
Command Transmission & Verification Operations
Voyager 1 command operations consisted of the
uplink of a Command Loss Timer Reset on 09/20 [DOY 264/2010z]. 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 09/18 [DOY 262/1617z]. The spacecraft received two
of the seven commands sent.
Sequence
Generation Operations
Data
Return Operations
Voyager 1 Data Processing and Operations:
There were 53.3 hours of DSN scheduled support
for Voyager 1 of which 50.0 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 sub
reflector problems at DSS-14. The first
outage of 0.8 hours occurred on 09/17 [DOY 261, DR G113229]. The second outage of 1.7 hours occurred the
next day on 09/18 [DOY 262, DR G113231].
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 15. The EDR backlog is 9 days.
Voyager 2 Data Processing and Operations:
There were 39.1 hours of
DSN scheduled support for Voyager 2 of which 13.6 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 9 days.
Flight
System Performance
Voyager 1 performance was nominal during this
report period. Activities included
X-Band high power/MAGROL/Gyros BC OFF/X-Band low power on 9/19 (DOY263/264).
Voyager 2 performance was nominal during this
report period. Activity included a
PMPCAL on 9/18 (DOY
263).
PROPELLANT/POWER
CONSUMABLES STATUS AS OF THIS REPORT
|
Spacecraft |
Consumption One
Week (Gm) |
Propellant Remaining
(Kg) |
Output (Watts) |
Margin (Watts) |
|
1 |
46.54* |
26.27 |
264.0 |
17 |
|
2 |
56.62** |
26.63 |
265.1 |
22 |
*MAGROL
2012-264/2143 **MAGROL
2012-259/0753
RANGE,
VELOCITY AND ROUND TRIP LIGHT TIME AS OF THIS REPORT
|
|
Voyager
1 |
Voyager
2 |
|
Distance from the Sun (Km) |
18,239,000,000 |
14,904,000,000 |
|
Distance from the Sun (Mi) |
11,333,000,000 |
9,261,000,000 |
|
Distance from the Earth (Km) |
18,268,000,000 |
14,860,000,000 |
|
Distance from the Earth (Mi) |
11,351,000,000 |
9,234,000,000 |
|
Total Distance Traveled Since Launch (Km) |
24,446,000,000 |
23,388,000,000 |
|
Total Distance Traveled Since Launch (Mi) |
15,190,000,000 |
14,533,000,000 |
|
Velocity Relative to Sun (Km/sec) |
17.044 |
15.438 |
|
Velocity Relative to Sun (Mi/hr) |
38,126 |
34,532 |
|
Velocity Relative to Earth (Km/sec) |
44.575 |
40.954 |
|
Velocity Relative to Earth (Mi/hr) |
99,711 |
91,610 |
|
Round Trip Light Time (hh:mm:ss) |
33:50:24 |
27:32:18 |