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Developed by Orbital Sciences Corporation
Physical Specifications:
- Dimensions: 56” long x 22.5” diameter
- Weight: 251 lb.
- Optics mounted to 4 invar rods for axial stability over
wide temperature range.
- Optics enclosed in a cantilevered inner barrel which is
decoupled from the weight of the front window.
- Minimum resonance: 120 Hz.
- Surfaces: interior- black anodized aluminum, exterior-
white enamel paint.
- Heaters on front/side windows and desiccant system used
for dew mitigation.
- Telescope O-ring sealed for contamination and moisture
control.
- Air bladder compensates for thermally induced internal
pressure changes
- Sun shield reduces stray light infiltration
Optical Specifications:
- Off-axis Cassegrain with 17” diameter primary mirror
- 16” clear aperture
- 10X magnification
- Edge obscuration due to secondary: ~9%
- Performed optical wavefront test through entire telescope
system and measured .36 waves rms.
 
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