baalke@mars.jpl.nasa.gov (Ron Baalke) (11/06/90)
Pioneer 11 Status Report
November 2, 1990
The Pioneer 11 spacecraft is still operating with Receiver A on the Medium
Gain Antenna (MGA). The uplink margin for the MGA has been established to
be somewhere between 150 and 191 kw. Receiver B on the High Gain Antenna
(HGA) still has not responded to commands at 350 kw. Commands were addressed
to both decoders but the command was unsuccessful.
On October 29, a CONSCAN procedure was transmitted over the 70 meter
antenna in Spain at 350 kw. This used the MGA to determine the spacecraft's
attitude. However, it appears that due to the low signal strength, large
errors are introduced when the CONSCAN Signal Processor determines the
pointing amplitude and phase, making the telemetered data unusable.
On October 31, the spacecraft was commanded back to Format A. No
science data was collected from October 6 through October 31.
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/_ /| /____/ \ /_ /|
| | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov
___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov
/___| | | | ___/ | |/__ /| M/S 301-355 |
|_____|/ |_|/ |_____|/ Pasadena, CA 91109 |