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System Details and Calibrations of the CRL-ASI

System Details and Calibrations of the CRL-ASI. Minoru Kubota Communications Research Laboratory. Contents System details of the CRL-ASI Calibration and data processing for the CRL-ASI. 2000 ～. Instruments and Targets of the Alaska project. System details of the CRL-ASI.

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System Details and Calibrations of the CRL-ASI

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  1. System Details and Calibrations of the CRL-ASI Minoru Kubota Communications Research Laboratory • Contents • System details of the CRL-ASI • Calibration and data processing • for the CRL-ASI

  2. 2000～ Instruments and Targets of the Alaska project

  3. System details of the CRL-ASI System diagram of CRL-ASI

  4. Size and externals

  5. Optical system f80 mm Bright and Precise! • Fisheye Nikkor • f6 mm • F1.4 • FOV 180o • Weight: 5 kg Total transmission of fisheye lens and telecentric lens system

  6. Detector (CCD camera) • PixelVision • SpectraVideo Camera Model SV512 • format: 512×512 • Back-illuminated CCD (SITe) • O-ring Dewar • 3-stage thermoelectric cooler • (minimum temp. ~225K) • dark current: ~0.5 • electron/pixel/sec@230K • readout noise: ~12 • electron,rms@100kHz-readout Quantum efficiency of the back-illuminated CCD

  7. Control software • Functions: • decision of observation period and sequence • filter-channel control • focus control • CCD camera control (temperature setting, exposure, data readout ..) • data saving • making QL-images and display • operation from a remote-site • Programming Language: • Visual C++, Visual Basic, and IDL • OS:Windows NT Control panel of the CRL-ASI

  8. SALMON (System for Alaska Middle Atmosphere Observation Data Network) SALMON is developed using a high-speed computer networks, for effective use and display of the data observed in Alaska and for assistance in the data distribution. The system has capabilities of quasi-real time data transfer to CRL from Alaska, real time data displays on the world wide web.

  9. Please add SALMON in your bookmark!! http://salmon.crl.go.jp/

  10. Calibration and Image Data Processing of the CRL-ASI Sensitivity calibration using an integrating sphere Aug. 1999 in NIPR, Japan

  11. Image of the integrating sphere It shows that luminosity (sensitivity) drops towards the edge of the image. (mainly by vignetting)

  12. Image data processing WWW real-time display ftp

  13. [F. Kasten, Arch. Mateorol. Geophys. Bioklimatol., p206, 1966] Geometry of the van Rhijn effect and atmospheric extinction 100 km alt. Variation of the van Rhijn correction factor combined with atmospheric extinction versus zenith angle.

  14. CRL-ASI Observations at Poker Flat Observatory: Poker Flat Research Range (PFRR) LAT. 65.1oN、LON.147.5oW MLAT65.5o Observation Periods: Oct., 2000 ~ Apr., 2001 Sept., 2001 ~ Mar., 2002 Sept., 2002 ~ Mar., 2003 Sept., 2003 ~ Mar., 2004 2004 ~ ? : ASI field-of-view for an assumption of observation altitude of 100 km. : ASI field-of-view for 250 km altitude.

  15. Target emissions, filter details, and exposure times for the CRL-ASI in 2000

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