SETI bioastro: Voyager 1-2 Status Report 1208 for December 22-28, 2001

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From: LARRY KLAES (ljk4@msn.com)
Date: Tue Feb 05 2002 - 11:24:26 PST


VOYAGER MISSION OPERATIONS STATUS REPORT #1208, DECEMBER 22 – DECEMBER 28, 2001
COMMAND TRANSMISSION & VERIFICATION OPERATIONS
 There were no Voyager 1 command operations during the period.
 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 12/27 [DOY 361/0052z]. The spacecraft received four of the seven commands sent.
SEQUENCE GENERATION OPERATIONS
Continue sequence development of CCSL B115.
DATA RETURN OPERATIONS
Voyager 1 Data Processing and Operations:
There were 77.3 hours of DSN scheduled support for Voyager 1 of which 4.0 hours were large aperture coverage. There were no real-time or schedule support changes during the period.
There were two significant outages during the period both caused by poor weather conditions at Madrid. The first outage of 8.3 hours duration was caused by a snowstorm at DSS-65 on 12/23 [DOY 357, DR M100431]. The second outage of 1.2 hours was attributed to poor weather conditions at DSS-65 on 12/24 [DOY 358, DR M100440].
Science instrument performance was nominal for all activities during this period. One frame of GS-4 data was recorded this week. The AHELI1 cyclic for recording additional GS-4 data was enabled on November 17. One frame of GS-4 data from this cyclic was recorded on December 22. The EDR backlog is 2 days.
Voyager 2 Data Processing and Operations:
There were 68.2 hours of DSN scheduled support for Voyager 2 of which 7.8 hours were large aperture coverage. There were no real-time or schedule support changes during the period.
There was one significant outages of 0.6 hours duration on 12/26 [DOY 360] due to a commercial power outage at DSS-45. [DR C100754].
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 December 22, using the BHELI 1 cyclic, which was enabled on July 14. The PRA receiver recovered from it’s 82nd POR event on December 24. This event occurred between two station DSS-45 passes. The EDR backlog is 3 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 12-27-01/12-28-01
  
SpacecraftConsumption
One Week (Gm)Propellant
Remaining (Kg)Output
(Watts)Margin
(Watts)
319.6431.07310.229
329.4032.91312.057

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 12/28/01
 Voyager 1Voyager 2
Distance from the Sun (Km)12,468,000,0009,863,000,000
Distance from the Sun (Mi)7,747,000,0006,129,000,000
Distance from the Earth (Km)12,578,000,0009,992,000,000
Distance from the Earth (Mi)7,816,000,0006,209,000,000
Total Distance Traveled Since
Launch (Km)
14,285,000,000
13,409,000,000
Total Distance Traveled Since
Launch (Mi)
8,876,000,000
8,332,000,000
Velocity Relative to Sun
 (Km/sec)
17.237
15.730
Velocity Relative to Sun
 (Mi/hr)
38,557
35,187
Velocity Relative to Earth
 (Km/sec)
31.476
36.881
Velocity Relative to Earth
 (Mi/hr)
70,410
82,501
Round Trip Light Time
(Hours:Minutes:Seconds)
23:18:28
18:31:02


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