Fiber run measurements, April 2024:
- From Nasmyth focus to top of pier needs measurement of exact route, but roughly 62.25 inches estimated
- From top of pier to bottom of pier: 4' 6“
- from bottom of pier to J3 junction box (concrete): 22' 3”, including some estimate of service loop for azimuth motion (SEEMS SHORT???)
- from J3 junction box to J4 junction box : 98'
- from J4 junction box to J5 junction box : 25' 6“
- from J5 junction box to big box on wall of SDSS pier: 24'
- from big box to small junction box where conduit enters APOGEE raceway: 40' 4”
- from small junction box up to wall in MARVELS room: 21' (but may need additional if service loops are needed for tight turns, e.g. from building entrance through APOGEE room heading up (SEEMS LONG?)
Total length from Nasmyth to MARVELS room
- in inches : 62.25 + (4*12+6) + (22*12+3) + (98*12) + (25*12+6) + (24*12) + (40*12+4) + (21*12) = 2889.25
- in meters : 73.38 m total
MARVELS room wall length ~6 meters, so need additional depending on where spectrograph is located
Some images of fiber run
Small junction box into APOGEE raceway
Turn inside APOGEE room
New conduit around SDSS
Raw fiber from Polymicro
