1 / 13

EVA 5: Batteries, FGS, NOBL

EVA 5: Batteries, FGS, NOBL. Ed Nelan May 21, 2009. Batteries: original batteries are 14 years older than design lifetime. new batteries are an improved design EVAs 2 & 5. Batteries: replacement batteries have passed Aliveness & Functional Tests. FGS2:

bryga
Download Presentation

EVA 5: Batteries, FGS, NOBL

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. EVA 5: Batteries, FGS, NOBL Ed Nelan May 21, 2009

  2. Batteries: • original batteries are 14 years older than design lifetime. • new batteries are an improved design • EVAs 2 & 5

  3. Batteries: • replacement batteries have passed Aliveness & Functional Tests

  4. FGS2: • FGS2 was replaced due to failing LEDs on its star selector servos, which put guide star acquisitions at risk. • Replacement FGS2 successfully passed it Aliveness and Functional Test • We now have: • FGS3 (original) • FGS2 (new) • FGS1 (1997)

  5. John Grunsfeld removes FGS2

  6. FGS2 Aliveness Test: High Voltage On, PMT dark counts > 0 Courtesy of Goodrich

  7. FGS2 Functional Test, part 1: • fine lock acquisition of Internal Test Source (ITS) • demonstrates interferometer functions “half” S-curve typically seen in fine lock acquisition Courtesy of Goodrich

  8. FGS2 Functional Test, part 2: • move AMA motors • +8 steps motor1 • - 8 steps motor2 • observe ITS position in finelock • move AMA motors back • - 8 steps motor1 • +8 steps motor2 • observe ITS position in finelock • observed shift of ITS position verifies AMA functions • test was a complete success.

  9. Upcoming FGS SMOV activities • Guide star acquisition tests (FGS1 & 3) • May 22 • FGS2 ITS measurement • May 22 • Checks for short term stability (compare to FT) • FGS1r Trans Mode observations of AMA target stars • May 31 • FGS2 AMA adjustments • June 1 through June 9

  10. Grunsfeld & Feustel installed New Outer Blanket Lining (NOBL) on bays 5, 7, & 8

  11. EVA 5 completed the SM4 manifest

More Related