Transcript Implementation Overrides

Implementation Overrides
Changed Sun avoidance angle from 50.25 degrees
to 46.0 degrees for Venus obsets.
 Suppressed OBAD at the beginning of Venus visit
02 to preserve scheduling spot after recent HST
ephemeris change.




OBADs normally occur when computed position
uncertainty is >70”.
Computed position uncertainty is 91” for visit 02.
Increased guide star acquisition time to allow for extra
uncertainty.
Implementation Overrides
Disabled moving target tracking and parallax
correction for Venus offset pointings in Venus
visits.
 Changed guide star request parameters


Obsets A1 (Venus), A2 (Venus), and 10 (GS aq. test)


primary single spoiler radius from 75” to 47”
Obsets A4 (Venus) and 11 (GS acq. test)
Off –nominal roll from 30 degrees to 5 degrees
 Primary single spoiler radius from 75” to 39”
 Primary double spoiler radius from 75” to 49”

Implementation Overrides

Changed guide star request parameters

Obsets 05 (Venus offset) and 06 (Venus offset)


Off –nominal roll from 30 degrees to 5 degrees
Obset A5 (Venus)
Off-nominal roll from 30 degrees to 5 degrees
 Primary single spoiler from 75” to 47”


Ignore Earth avoidance constraint for post-Venus
offset pointing.


Just a gyro pointing
No science happening