3 ms·
It's constrained to about 10 degrees in the roll axis, 50 degrees in pitch (-5 to +45), 360 in yaw. At any given moment, it can point anywhere in about 39% of
by bewaretheirs 5y ago
It's constrained to about 10 degrees in the roll axis, 50 degrees in pitch (-5 to +45), 360 in yaw. At any given moment, it can point anywhere in about 39% of the full sky (inner solar system excluded of course), but can access the entire sky over a period of 6 months.
see: https://jwst-docs.stsci.edu/jwst-observatory-characteristics/jwst-observatory-coordinate-system-and-field-of-regard https://jwst-docs.stsci.edu/jwst-observatory-characteristics...
Or in video form: https://www.youtube.com/watch?v=y0bOi3kVIBs https://www.youtube.com/watch?v=y0bOi3kVIBs
- sandworm101 5y agoPerspective is funny. When I think of it hanging out there in space I think of it as having 360 in roll. But I guess if you were facing in the direction of the mirror that would be 360 in yaw.
- bewaretheirs 5y agoyeah, really depends on the coordinate system you use but to me it's like a square-rigged ship with the sunshade as the hull, the tower as mast, and the main mirror as sail. And it's consistent with the terminology used to describe parts of the sunshade during deployment -- fore/aft sunshield pallets, port/starboard sunshield booms..