Voyager Mission Operations Status Report 3-9 Mar 2001
COMMAND TRANSMISSION & VERIFICATION OPERATIONS
Voyager 1 command operations consisted of the uplink of a command loss timer reset on 03/08 [DOY 067/1530z]. 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 03/05 [DOY 064/1912z]. The spacecraft received four of the seven commands sent.
SEQUENCE GENERATION OPERATIONS
Continue UVS development as a part of sequence development for CCSL A039.
DATA RETURN OPERATIONS
Voyager 1 Data Processing and Operations:
There were 90.6 hours of DSN scheduled support for Voyager 1 of which 38.8 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.
There was one significant outage of 1.5 hours duration on 03/03 [DOY 062] due to antenna problems at DSS-24 [DR G06790].
Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. The PRA receiver recovered from its 49th POR event on March 5. The EDR backlog is 2 days.
Voyager 2 Data Processing and Operations:
There were 75.9 hours of DSN scheduled support for Voyager 2 of which 20.9 hours were large aperture coverage. There was one real-time change made during the period, on 03/03 [DOY 062] 2.3 hours of DSS-34 support was released to support the EUTELSAT launch. The total actual support for the period was 73.6 hours of which 20.9 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. Ninety-seven percent of the data from a 26 frame GS-4 playback were recovered on March 7. 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. Activities included a PMPCAL on 3/3 (DOY 065), DTR playback of PWS data on 3/7 (DOY 066), X-Band High Power followed by a DTR playback on 3/7 (DOY 066), and turn-on of the B/C gyros on 3/8 (DOY 067).
PROPELLANT/POWER CONSUMABLES STATUS AS OF 3/7/01-3/9/01
Spacecraft | Consumption One Week (Gm) | Propellant Remaining (Kg) | Output (Watts) | Margin (Watts) |
31 | 6.55 | 31.56 | 314.1 | 37 |
32 | 8.78 | 33.49 | 315.6 | 46 |
RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 3/9/01
| Voyager 1 | Voyager 2 |
Distance from the Sun (Km) | 12,034,000,000 | 9,491,000,000 |
Distance from the Sun (Mi) | 7,478,000,000 | 5,897,000,000 |
Distance from the Earth (Km) | 12,019,000,000 | 9,554,000,000 |
Distance from the Earth (Mi) | 7,468,000,000 | 5,937,000,000 |
Total Distance Traveled Since Launch (Km) | 13,847,000,000 | 13,009,000,000 |
Total Distance Traveled Since Launch (Mi) | 8,604,000,000 | 8,083,000,000 |
Velocity Relative to Sun (Km/sec) | 17.254 | 15.760 |
Velocity Relative to Sun (Mi/hr) | 38,597 | 35,254 |
Velocity Relative to Earth (Km/sec) | 18.830 | 25.074 |
Velocity Relative to Earth (Mi/hr) | 42,122 | 56,089 |
Round Trip Light Time (Hours:Minutes:Seconds) | 22:16:44 | 17:42:48 |
