From: baalke@kelvin.jpl.nasa.gov (Ron Baalke)
Subject: Galileo Update - 08/14/92
News-Software: VAX/VMS VNEWS 1.3-4   
Keywords:  Galileo, JPL
Reply-To: baalke@kelvin.jpl.nasa.gov
Organization: Jet Propulsion Laboratory
Date: Sat, 15 Aug 1992 00:22:46 GMT

Forwarded from Neal Ausman, Galileo Mission Director

                                  GALILEO
                       MISSION DIRECTOR STATUS REPORT
                               POST-LAUNCH
                            August 7 - 13, 1992

SPACECRAFT

1.  On August 7, the final portion of TCM-14 (Trajectory Correction
Maneuver #14), TCM-14D, was performed consisting of one small (0.4 m/sec)
axial burn followed by a three segment lateral burn of 2.3 m/sec.  The
spacecraft performance throughout the maneuver activity was normal and near
expected levels.  In particular, the RPM (Retro-Propulsion Module) tank
pressures and temperatures were normal throughout the four burn segments.
Radio navigation data after TCM-14D indicated about a 1.3 percent overburn.
The integrated 4-portion overburn was about 1.4 percent.

2.  On August 7, the EE-7 (Earth-Earth 7) sequence memory load was uplinked
to the spacecraft.  This sequence covers spacecraft activities from
August 10, 1992 to November 23, 1992.  The sequence was loaded on the
spacecraft without incident.

3.  On August 10, a NO-OP command was sent to reset the command loss timer
to 264 hours, its planned value for this mission phase.

4.  On August 10, the Energetic Particle Detector (EPD) was returned to
Sector 4 from Sector 0 after the completion of TCM-14.  The EPD instrument
was placed in Sector 0 for TCM-14 because it was the predicted least
contamination position for the maneuver.

5.  The AC/DC bus imbalance measurements exhibited some change.  The AC
measurement increased 1 DN and reads 3.3 volts.  The DC measurement has
ranged from 103 DN (11.9 volts) to 160 DN (18.9 volts) and now reads 127 DN
(14.9 volts).  These measurement variations are consistent with the model
developed by the AC/DC special anomaly team.

6.  The Spacecraft status as of August 13, 1992, is as follows:

       a)  System Power Margin -  70 watts
       b)  Spin Configuration - Dual-Spin
       c)  Spin Rate/Sensor - 3.16 rpm/Star Scanner
       d)  Spacecraft Attitude is approximately 6 degrees
           off-sun (lagging) and 40 degrees off-earth (lagging)
       e)  Downlink telemetry rate/antenna-40 bps (coded)/LGA-1
       f)  General Thermal Control - all temperatures within
           acceptable range
       g)  RPM Tank Pressures - all within acceptable range
       h)  Orbiter Science - UVS, EUV, DDS, MAG, EPD, and HIC are
           powered on
       i)  Probe/RRH - powered off, temperatures within
           acceptable range
       j)  CMD Loss Timer Setting - 264 hours
           Time To Initiation - 184 hours


TRAJECTORY

     As of noon Thursday, August 13, 1992, the Galileo Spacecraft trajectory
status was as follows:

        Distance from Earth         97,738,600 miles (1.05 AU)
	Distance from Sun           156,757,800 miles (1.69 AU)
	Heliocentric Speed           49,700 miles per hour
	Distance from Jupiter        660,750,900 miles
	Round Trip Light Time        17 minutes, 38 seconds

SPECIAL TOPIC

1.  As of August 13, 1992, a total of 8109 real-time commands have been
transmitted to Galileo since Launch.  Of these, 3231  were pre-planned in
the sequence design and 4872 were not.  In the past week, 1 real time command
was transmitted and pre-planned in the sequence design.  In addition, 5427
mini-sequence commands have been transmitted since March 1991; 3269 were
pre-planned and 2158 were not.  In the past week, no mini-sequence commands
were transmitted.  Major command activities this week included commands to
reset the command loss timer.
     ___    _____     ___
    /_ /|  /____/ \  /_ /|     Ron Baalke         | baalke@kelvin.jpl.nasa.gov
    | | | |  __ \ /| | | |     Jet Propulsion Lab |
 ___| | | | |__) |/  | | |__   M/S 525-3684 Telos | You can't hide broccoli in
/___| | | |  ___/    | |/__ /| Pasadena, CA 91109 | a glass of milk - 
|_____|/  |_|/       |_____|/                     | anonymous 7-year old.