ISOPHOT calibration facility and pre-flight characterization

Juergen Wolf; Carlos Gabriel; Ulrich Groezinger; Ingolf Heinrichsen; Gerhard Hirth; Stefan Kirches; Dietrich Lemke; Josef Schubert; Bernhard Schulz; Clemens N. Tilgner; Manfred Boison; Albrecht Frey; Ib Lundgaard Rasmussen; Robert Wagner; Klaus Proetel

doi:10.1117/12.157816

1 October 1993 ISOPHOT calibration facility and pre-flight characterization

Juergen Wolf, Carlos Gabriel, Ulrich Groezinger, Ingolf Heinrichsen, Gerhard Hirth, Stefan Kirches, Dietrich Lemke, Josef Schubert, Bernhard Schulz, Clemens N. Tilgner, Manfred Boison, Albrecht Frey, Ib Lundgaard Rasmussen, Robert Wagner, Klaus Proetel

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Proceedings Volume 2019, Infrared Spaceborne Remote Sensing; (1993) https://doi.org/10.1117/12.157816
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

A calibration facility simulating the optical and cryogenic environment of the ISO satellite has been built for characterizing the ISOPHOT instrument. This facility uses a commercially calibrated, 900 K--blackbody radiation source and an optics at room temperature to provide an f/15 beam to the instrument which is contained in a LHe-cryostat. The low level infrared flux levels of ISO are obtained by use of a light sealed instrument chamber and cold attenuation filters. The infrared flux can be calculated using the known blackbody emission and the cold calibrated transmission spectra of the filters. The calibration facility further provides a scanning mechanism, a light modulator and filters for polarization measurements and wavelength calibrations of the ISOPHOT spectrometer channels. Electrical support equipment for the instrument operation and software for data archiving and analysis have been customized for this project. The test program comprised a standardized acceptance test for the entire instrument and special tests addressing individual instrument properties. The data obtained contain the photometric sensitivities of ISOPHOT, optimized instrument settings, reference data for the integrated system tests and inputs for the ongoing mission planning.

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Juergen Wolf, Carlos Gabriel, Ulrich Groezinger, Ingolf Heinrichsen, Gerhard Hirth, Stefan Kirches, Dietrich Lemke, Josef Schubert, Bernhard Schulz, Clemens N. Tilgner, Manfred Boison, Albrecht Frey, Ib Lundgaard Rasmussen, Robert Wagner, and Klaus Proetel "ISOPHOT calibration facility and pre-flight characterization", Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); https://doi.org/10.1117/12.157816

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KEYWORDS

Sensors

Calibration

Optical filters

Black bodies

Infrared radiation

Infrared sensors

Fluorescence correlation spectroscopy

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