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Near-infrared Imaging Spectrometer for NEXTSat-1

Near-infrared Imaging Spectrometer for NEXTSat-1. Dae‐Hee Lee Korea Astronomy and Space Science Institute. NISS on NEXTSat-1. NEXTSat-1 Korea’s 3 rd Scientific Micro-satellite PI institute: SaTReC, KAIST Spacecraft mass ~ 136 kg Spacecraft size ~ 60x60x80 cm3

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Near-infrared Imaging Spectrometer for NEXTSat-1

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  1. Near-infrared Imaging Spectrometer for NEXTSat-1 Dae‐Hee Lee Korea Astronomy and Space Science Institute

  2. NISS on NEXTSat-1 • NEXTSat-1 • Korea’s 3rd Scientific Micro-satellite • PI institute: SaTReC, KAIST • Spacecraft mass ~ 136 kg • Spacecraft size ~ 60x60x80 cm3 • Sun-sync orbit with 3 axis attitude control • Scheduled launch in 2017 • NISS • NIR Imaging Spectrometer for Star formation history • Observing emission/absorption spectral lines • Cosmic NIR background observation • PI institute: KASI • Mass ~ 18 kg, Size ~ 29x27x40 cm3 • Spectral coverage : 0.95 – 3.8 um • Spectral resolution ~ 20 with LVF • FoV: 2 x 2 degrees • Survey area > 100 sq degree

  3. IR sensor & readout • Teledyne HgCdTe sensor • 1K x 1K array using technologies from H2RG (18m cell pitch) • (GBA H2RG FPA with reduced Active Pixels and PRICE!) • Low noise (~10e-) & low heat dissipation (~ 1mW) • Quantum efficiency : 75 ~ 85% • Customized cut-off freq. : 3.8 m • Dark current at 80 K < 0.1e-/s @3.8 um • (Beletic et al. 2008, SPIE) • - Readout method: Window mode • - Reference pixel usage: CIBER2 heritage “Modified Guide Mode”

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