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 à 

Salle D-460
2900, chemin de la Tour
Montréal (QC) Canada  H3T 1J6

Jerry Harder, LASP, University of Colorado Boulder

The Solar Radiation and Climate Experiment (SORCE) mission has provided for the first time solar spectral irradiance (SSI) observations over a full solar cycle time period with wavelength coverage from the X-ray through the near infrared. We discuss the lessons-learned from SORCE including the need to develop more effective methods to track on-orbit spectroscopic response and sensitivity degradation. This is especially important in using spectral irradiance as input to modern day chemistry-climate models. A basic requirement to obtain this essential climate record is to 1) perform preflight radiometric calibrations that are traceable SI standards and 2) design the instrument to have the ability to perform instrument-only sensitivity corrections to objectively account for on-orbit degradation. 

Current NIST (National Institute of Science and Technology) capabilities now permit the full characterization of the spectral radiometer’s response.  Going forward, we discuss a compact spectral radiometer development that will couple with advances in CubeSat technology to permit shorter and more frequent missions without compromising measurement accuracy. We also discuss the development of a radiometric solar imager that will both greatly improve the interpretation of existing Sun-as-a-star irradiance observations and provide a bridge from our current irradiance capabilities to future high spatial/temporal resolution solar physics assets such as the Daniel K. Inouye Solar Telescope (DKIST).

Présentée par le Groupe Astronomie et astrophysique du Département de physique de l'Université de Montréal. Cette conférence est destinée à des spécialistes dans le domaine de l'astrophysique et sera donnée en anglais.

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