Voyager Mission Operations Status Report # 2004-01-23, Week Ending January 23, 2004
Command Transmission & Verification Operations
Voyager 1 command operations consisted of the uplink of a command loss timer reset, CCSL A050, and a CCS MRO on 01/20 [DOY 020/1514z]. The spacecraft received all commands sent and the CCSL was 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 and a Full AACS MRO on 01/17 [DOY 017/0237z]. Six of the seven bracketed commands plus the MRO command were received by the spacecraft.
Another seven bracketed command loss timer resets were sent on 01/21 [DOY 021/2157z]. The DSS-43 low power transmitter was declared red prior to transmission so the high power transmitter was used in place of [DR C 103261]. The spacecraft received four of the seven commands sent.
Sequence Generation Operations
Continue sequence development of CCSL B123.
Data Return Operations
Voyager 1 Data Processing and Operations:
There were 84.7 hours of DSN scheduled support for Voyager 1 of which 3.8 hours were large aperture coverage. There was one real-time changes made on 01/21 [DOY 021] when DSS-24 supported 0.5 hours in place of DSS-25 down due to a red maser [DR G103965]. The total actual support for the period remained unchanged
There was one significant outages of 0.5 hours duration on 01/18 [DOY 018] due to snow at DSS-65 [DR M102241]
Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. The AHELIO subroutine was reactivated on day 251, 2003. A frame of GS-4 data from this cyclic was recorded on January 17, 2004. The EDR backlog is 2 days.
Voyager 2 Data Processing and Operations:
There were 70.2 hours of DSN scheduled support for Voyager 2 of which 42.2 hours were large aperture coverage. There was one schedule changes made on 01/23 [DOY 023] when 1.3 hours of DSS-45 support was released to support MER. The total actual support for the period was 68.9 hours of which 42.2 hours were large aperture coverage.
There was one significant outages of 0.5 hours duration on 01/17 [DOY 017] due to high winds at DSS-49 [DR C103237]
Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. 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 |
7.62 |
29.71 |
301.1 |
31 |
| 2 |
7.25 |
31.50 |
302.5 |
48 |
RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 1/23/04
| Voyager 1 |
Voyager 2 |
|
| Distance from the Sun (Km) |
13,588,000,000 |
10,827,000,000 |
| Distance from the Sun (Mi) |
8,443,000,000 |
6,728,000,000 |
| Distance from the Earth (Km) |
13,668,000,000 |
10,952,000,000 |
| Distance from the Earth (Mi) |
8,493,000,000 |
6,805,000,000 |
| Total Distance Traveled Since Launch (Km) |
15,429,000,000 |
14,468,000,000 |
| Total Distance Traveled Since Launch (Mi) |
9,587,000,000 |
8,990,000,000 |
| Velocity Relative to Sun (Km/sec) |
17.201 |
15.664 |
| Velocity Relative to Sun (Mi/hr) |
38,478 |
35,039 |
| Velocity Relative to Earth (Km/sec) |
25.684 |
32.773 |
| Velocity Relative to Earth (Mi/hr) |
57,452 |
73,311 |
| Round Trip Light Time (hh:mm:ss) |
25:18:52 |
20:17:40 |