Voyager Mission Operations Status Report #1122, April 29 – May 5, 2000
VOYAGER MISSION OPERATIONS STATUS REPORT #1122, APRIL 29 – MAY 5, 2000 COMMAND TRANSMISSION & VERIFICATION OPERATIONS
Voyager 1 command operations consisted of the uplink of a command loss timer reset on 03/03 [DOY 124/2315z]. The spacecraft received the command.
Voyager 2 command operations consisted of the uplink of the B107 Mini Sequence and seven bracketed command loss timer resets, sent on five-minute centers using 0.5 Hz steps, on 05/01 [DOY 122/1829z and 2042z respectively]. The spacecraft received the Mini Sequence and commands three through six of the seven bracketed commands sent.
SEQUENCE GENERATION OPERATIONS
No sequence development activity during this report period.
DATA RETURN OPERATIONS
Voyager 1 Data Processing and Operations:
There were 107.6 hours of DSN scheduled support for Voyager 1 of which 55.8 hours were large aperture coverage. There were no real-time or schedule support changes made during the period.
There were two significant outages. The first outage of 0.5 hours occurred on 05/04 [DOY 125] and was caused by rain at DSS-65 [DR L04254]. The second outage of 0.6 hours occurred on 05/05 [DOY 126] was due to SRC problems at DSS-63 [DR L04258].
Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week with the PLS modulator switched off. The EDR backlog is 2 days.
Voyager 2 Data Processing and Operations:
There were 63.5 hours of DSN scheduled support for Voyager 2 of which 48.8 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. One frame of GS-4 data was recorded this week. The PRA receiver recovered from its 70th POR event, which occurred between station passes at DSS 43 on May 3. The EDR backlog is 2 days.
FLIGHT SYSTEM PERFORMANCE
Voyager 1 performance was nominal during this report period. Activities included an ASCAL on 5/2 (DOY 123) and a MAGROL on 5/5 (DOY 126).
Voyager 2 performance was nominal during this report period. Activity included a PMPCAL on 5/2 (DOY 123).
PROPELLANT/POWER CONSUMABLES STATUS AS OF 5-3-00/5-5-00
Spacecraft | Consumption One Week (Gm) | Propellant Remaining (Kg) | Output (Watts) | Margin (Watts) |
31 | 8.90* | 32.03 | 318.0 | 33 |
32 | 9.35 | 34.04 | 319.7 | 61 |
*ASCAL 00-123/0758
RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 5/5/00
| Voyager 1 | Voyager 2 |
Distance from the Sun (Km) | 11,579,000,000 | 9,102,000,000 |
Distance from the Sun (Mi) | 7,195,000,000 | 5,656,000,000 |
Distance from the Earth (Km) | 11,467,000,000 | 9,038,000,000 |
Distance from the Earth (Mi) | 7,126,000,000 | 5,616,000,000 |
Total Distance Traveled Since Launch (Km) | 13,387,000,000 | 12,589,000,000 |
Total Distance Traveled Since Launch (Mi) | 8,318,000,000 | 7,822,000,000 |
Velocity Relative to Sun (Km/sec) | 17.274 | 15.796 |
Velocity Relative to Sun (Mi/hr) | 38,641 | 35,333 |
Velocity Relative to Earth (Km/sec) | 25.927 | 22.952 |
Velocity Relative to Earth (Mi/hr) | 57,997 | 51,341 |
Round Trip Light Time (Hours:Minutes:Seconds) | 21:14:58 | 16:44:52 |
