baalke@mars.jpl.nasa.gov (Ron Baalke) (02/09/91)
PIONEER 11 STATUS REPORT
February 8, 1991
Another unsuccessful attempt to switch receivers on the Pioneer 11
spacecraft was made on February 1. There were no command rejects. The power
sharing plan implemented on February 1 (HVM and TRD on) will remain in effect
for February and March 1991.
Work is continuing to develop a method to determine the spacecraft
pointing attitude (no attitude has been obtained since the receiver failure).
On January 9 an IPP (Imaging Photopolarimeter) procedure will be transmitted
which will obtain the the roll and cone angles of Sirius and Canopus. If
sufficient data is obtained, the intersection of the two cone angles may be
used to determine the attitude.
From February 9 to 10, the spacecraft will be placed in format C
(engineering) to increase the sample rate of the telemetered receiver lock
status. This will help determine the accuracy of the uplink predicts.
___ _____ ___
/_ /| /____/ \ /_ /| 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?
|_____|/ |_|/ |_____|/ | We do!