Voyager Mission Operations Status Report # 2009-07-03,  Week Ending  July 3, 2009

 

Command Transmission & Verification Operations

 

Voyager 1 command operations consisted of the uplink of a Command Loss Timer Reset on 06/29 [DOY 180/1450z].  The spacecraft received the command.

 

Voyager 2 command operations consisted of the uplink of Hpoint1 PTR Set, PTR DMRO and a Command Loss Timer Reset on 06/30 [DOY 181/1346z]. The spacecraft received all commands sent, the Hpoint1 PTR Set and the PTR DMRO was verified.

 

Sequence Generation Operations

 

Start sequence development of CCSL B145.

 

Data Return Operations

 

Voyager 1 Data Processing and Operations:

 

There were 96.8 hours of DSN scheduled support for Voyager 1 of which 31.9 hours were large aperture coverage. There were three schedule support change made.  The first change on 06/27 [DOY 178] substituted 4.3 hours of DSS-26/25 array support for 7.0 hours of DSS-15 down due to a Red antenna.  The second change on the same day 6.0 hours of DSS-43 support released fromVGR2 replaced 2.9 hours of DSS-45 down due to a Red Maser. The last change released 2.1 hours of DSS-45down due to a red Maser.  The total actual support for the period was 95.1 hours of which 37.9 hours were large aperture coverage.

 

There was one significant outage of 4.3 hours on 06/30 [DOY 181] due to a red Maser at DSS-45 [DR C106983].

 

 

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 July 3.  The EDR backlog is 9 day.

 

Voyager 2 Data Processing and Operations:

 

There were 63.1 hours of DSN scheduled support for Voyager 2 of which 19.8 hours were large aperture coverage. There were five schedule support changes made.  The first change on 06/27 [DOY 178] substituted 4.6 hours of DSS-34 support in place of 5.8 hours of DSS-43 released to support VGR1.  The second change extended the DSS-43 track 8.0 hours on 07/01 [DOY 182].  The following change on the same day released 3.6 hours of DSS-45 support to Maser maintenance.  The following change enabled the continued maintenance at DSS-45 the next day when 10.2 hours of DSS-45 support was released and substituted in place were 5.9 hours of DSS-43 and 6.1 hours of DSS-34 support.    The final support change on 07/03 [DOY 184] added 2.2 hours of DSS-43 and extended the DSS-34 support by 1.0 hours.  The total actual support for the period was 71.3 hours of which 30.1 hours were large aperture coverage.

 

There was one significant outage of 8.0 hours on 06/30 [DOY 181] due to a TLP1 problem at DSS-43 [DR C106986].

 

 

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.

 

Voyager 2 performance was nominal during this report period.  Activity included a PMPCAL on 6/30 [DOY 181].

 

PROPELLANT/POWER CONSUMABLES STATUS AS OF THIS REPORT

 

 

Spacecraft

Consumption

One Week (Gm)

Propellant

Remaining (Kg)

Output

(Watts)

Margin

(Watts)

1

4.18

26.63

277.4

33

2

5.40

28.28

278.7

33

 

 

RANGE, VELOCITY AND ROUND TRIP LIGHT TIME AS OF 7/3/2009

 

 

Voyager 1

Voyager 2

Distance from the Sun (Km)

16,514,000,000

13,384,000,000

Distance from the Sun (Mi)

10,261,000,000

8,317,000,000

Distance from the Earth (Km)

16,403,000,000

13,258,000,000

Distance from the Earth (Mi)

10,192,000,000

8,238,000,000

Total Distance Traveled Since Launch (Km)

21,015,000,000

20,022,000,000

Total Distance Traveled Since Launch (Mi)

13,058,000,000

12,442,000,000

Velocity Relative to Sun  (Km/sec)

17.083

15.506

Velocity Relative to Sun  (Mi/hr)

38,213

34,686

Velocity Relative to Earth  (Km/sec)

37.725

30.948

Velocity Relative to Earth  (Mi/hr)

84,388

69,227

Round Trip Light Time (hh:mm:ss)

30:23:02

24:34:00