Campuses:
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| ====== Telecon 20170926 ====== | ====== Telecon 20170926 ====== | ||
| - | Attending: | + | Attending: |
| __Agenda: | __Agenda: | ||
| - | * optical system (Qi) | + | * optical system (Qi) {{:: |
| - | * Scan angles (Gorski, Delabrouille) | + | * {{:: |
| - | * noise model and focal plane options (Young) | + | * {{:: |
| __Notes:__ | __Notes:__ | ||
| + | |||
| + | Attending: Brian, Jeff, Julian, Kris, Shaul, Qi | ||
| + | |||
| + | Scanning rates | ||
| + | |||
| + | * Brian will look into scanning speeds, possible limits etc. (**AI**) | ||
| + | * With reaction wheels, there is not much coupling between precession and spin; If increase spin, precession may be slower. | ||
| + | * WMAP used reaction wheels | ||
| + | |||
| + | Scan angles (Kris) | ||
| + | * mitigation of polarization systematics | ||
| + | * alpha: angle between boresight and spin axis; beta: angle between sun-satellite and spin axis (swapped definitions) | ||
| + | * Plots are one-year average on single pixel; at least 4 hits per pixel | ||
| + | * Large precession angle helps mix pixels | ||
| + | * Kris is going to calculate at different spin and precession rates. (**AI**) | ||
| + | |||
| + | Cross Dragone (Qi) | ||
| + | * Requirements: | ||
| + | * With a third flat mirror, two designs below do not have direct view of sky and can fit into the envelope | ||
| + | * D=140 cm, F#=3.0, FOV=+/- 5 deg | ||
| + | * D=120 cm, F#3.5, FOV=+/-7 deg | ||
| + | * Sidelobes still exist. | ||