baalke@mars.jpl.nasa.gov (Ron Baalke) (02/09/91)
VOYAGER STATUS REPORT
February 8, 1991
Voyager 1
The Voyager 1 spacecraft collected routine UVS (Ultraviolet Spectrometer)
data on the South Galactic Pole. On January 29, one frame of high-rate PWS
(Plasma Wave) data was recorded. Also on January 29, a TLC (Tracking Loop
Capacitor) test was executed by 70 meter Madrid antenna. Round trip light
time is 12 hours, 14 minutes.
A Dummy CC command was transmitted to the spacecraft on January 31 to
reset the Command Loss Timer. CCS (Computer Command Subsystem) Load A006 was
also successfully transmitted to the spacecraft and verified by CCS checksum.
It is scheduled to begin on February 4.
Voyager 2
The Voyager 2 spacecraft collected routine UVS data on source HD 17925.
On January 29 a frame of PWS data was recorded on the DTR (Digital Tape
Recorder) for future playback. Round trip light time is 9 hours, 37 minutes.
A Dummy CC command was transmitted to the spacecraft on January 28 to
reset the Command Loss Timer.
Execution of the Gyroscope C investigation mini-sequence began on
January 31. A full AACS (Attitude and Articulation Control Subsystem) memory
readout was performed, FDS (Flight Data Subsystem) commutator changes were
made to improve visibility of AACS parameters, AACS gyro test patches were
loaded, gyro C test #1 was linked, a full AACS memory readout was executed to
verify the changes, and gyros B and C were turned on and initialized. Gyros
B and C drift rates will continue to be monitored until the end of test #1
on February 7. All indications were normal.
The PLS (Plasma), MAG (Magnetometer), CRS (Cosmic Ray), and LECP (Low
Energy Charged Particles) instruments are measuring and recording the
heliospheric medium and continuing to look for signs of the interaction
between the solar wind and the interstellar medium. On January 25, the
Plasma instrument recorded a solar wind speed average of 385 kilometers/second,
with a particle density of about 0.024/cc. The Magnetometer instrument is
reading a magnetic field strength before background subtraction of about 0.7
gamma on Voyager 2 and 1.3 gamma on Voyager 1. The Cosmic Ray and Low Energy
Charged Particle instruments continue to measure energetic electrons and
nucleons.
CONSUMABLE STATUS AS OF 02/08/91
P R O P E L L A N T S T A T U S P O W E R
Consumption
One Week Propellant Remaining Output Margin
Spacecraft (Gm) (Kg) Watts Watts
Voyager 1 6 36.2 + 2.0 366 53
Voyager 2 6 39.1 + 2.0 370 46
___ _____ ___
/_ /| /____/ \ /_ /| Ron Baalke | baalke@mars.jpl.nasa.gov
| | | | __ \ /| | | | Jet Propulsion Lab |
___| | | | |__) |/ | | |___ M/S 301-355 | It's 10PM, do you know
/___| | | | ___/ | |/__ /| Pasadena, CA 91109 | where your spacecraft is?
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