replaced. The lines were then twisted into
a large braid to reduce movement and friction, which cause the lines to wear.
Regular preventative maintenance tasks
on the A & G unit were completed successfully, and several outstanding faults were
resolved. Mainly a long-standing one on the
adaptive optics fold mirror, which prevented
it from responding correctly, was fixed. The
mirror is now working fine. The science-fold
mirror was also tuned for correct movement
between all the different focal stations, and
measurements were taken to consider the
feasibility of purchasing a spare.
Gemini Planet Imager
Commissioning Run
The fourth and final planned commissioning run for the Gemini Planet Imager (GPI)
was successfully completed during the first
half of September. Extensive testing in the
lab and on the f