1 / 3

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”.

gisela-little
Download Presentation

Implementation Overrides

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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.

  2. 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”

  3. 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

More Related