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Mission
Parameters |
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Launch Date |
March 2007 |
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Launch Vehicle |
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Orbit |
High-Earth, Lunar-Assist Open Orbit Period: 13.7 days (1/2 lunar period) |
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Science Program Duration |
30 months (Baseline Mission) |
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Payload |
Co-aligned UV/VIS and X-Ray spectrophotometers |
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Spacecraft |
Spectrum Astro SA-200HP |
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Slew Rate |
180° in 430 sec |
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Observatory Mass (Wet) |
883 kg |
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Power Requirements |
641 Watts |
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Observatory Pointing Accuracy |
<7" |
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Ground Communications |
Commercially through Universal Space Network, Inc. |
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Spacecraft Communications |
Phased array (X-band) |
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Uplink |
S-band, 10 kb/uplink |
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Downlink |
Spacecraft: S-band, 125 bps |
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Science: X-band, 3500 Mbytes/day |
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UV/VIS
Instrument Parameters |
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Aperture |
70 cm |
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Mirror Type |
Off-axis parabola |
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Focal Ratio |
f/4.25 |
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Field of View |
20" × 20" |
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Spectrograph Type |
Modified Rowland |
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Gratings |
Mild toroids |
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Far Ultraviolet |
Near
Ultraviolet/Visible |
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Bandpass |
100 - 170 nm |
270 - 540 nm |
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Spectral Resolution |
0.15 nm |
0.25 nm |
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Detector |
Photon-counting electron- |
Integrating CCD |
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Timing Resolution |
<500 msec |
<500 msec |
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X-Ray Instrument
Parameters |
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Aperture |
40 cm |
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Mirror Type |
Segmented conical foil |
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Mirror Coating |
Gold |
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Focal Length |
3.4 m |
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Bandpass |
0.1 - 10 keV |
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Spatial Resolution (half power) |
1.5' |
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Field of View |
24' × 24' |
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Detector |
CCD (600 × 600, 40 µm pixels) |
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Filters |
Al (48 nm) + polyimide (180 nm) + Ni mesh |
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Timing Resolution |
<200 msec |
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Go to: [Kronos Home Page] [OSU Astronomy Home Page]
Updated 29 October 2001
peterson@astronomy.ohio-state.edu